Scholars@Duke
Richard Frederick Kay

Richard Frederick Kay

Professor Emeritus of Evolutionary Anthropology
Evolutionary Anthropology
richard.kay@duke.edu
Duke Box 90383, Durham, NC 27708-0383
0013 Biological Sciences Building, 130 Science Drive, Durham, NC 27708

Selected Publications

Dental sculpting and compensatory shearing crests demonstrated in a WEAR series of Presbytis rubicunda (Cercopithecoidea, Colobidae) with dental topography analysis.

Journal Article American journal of biological anthropology · September 2024 ObjectivesMaintaining effective and efficient occlusal morphology presents adaptive challenges for mammals, particularly because mastication produces interactions with foods and other materials that alters the geometry of occlusal surfaces through ... Full text Open Access Cite

Dental topography of the Oligocene anthropoids Aegyptopithecus zeuxis and Apidium phiomense: Paleodietary insights from analysis of wear series.

Journal Article Journal of human evolution · July 2023 Fossil primate dietary inference is enhanced when ascertained through multiple, distinct proxies. Dental topography can be used to assess changes in occlusal morphology with macrowear, providing insight on tooth use and function across the lifespans of ind ... Full text Open Access Cite

Sign-oriented Dirichlet Normal Energy: Aligning Dental Topography and Dental Function in the R-package molaR

Journal Article Journal of Mammalian Evolution · December 1, 2022 Dirichlet normal energy (DNE) is a dental topography measurement aimed at capturing occlusal sharpness and has shown promise for its ability to sort primate molars according to perceived shearing ability. As initially implemented, this measurement does not ... Full text Open Access Cite

Fossil vertebrates of the early-middle Miocene Cerro Boleadoras Formation, northwestern Santa Cruz Province, Patagonia, Argentina

Journal Article Andean Geology · September 1, 2022 The early-middle Miocene continental Cerro Boleadoras Formation (CBF) crops out in the area of Cerro Boleadoras and Cerro Plomo on the western slope of the Meseta del Lago Buenos Aires, northwestern Santa Cruz Province, Argentina. The lower levels of the C ... Full text Open Access Cite

Unique nasal turbinal morphology reveals Homunculus patagonicus functionally converged on modern platyrrhine olfactory sensitivity.

Journal Article Journal of human evolution · June 2022 The phyletic position of early Miocene platyrrhine Homunculus patagonicus is currently a matter of debate. Some regard it to be an early member of the Pitheciidae, represented today by the sakis, uakaris, and titi monkeys. Others view Homunculus as a stem ... Full text Open Access Cite

A New Humerus of Homunculus patagonicus, a Stem Platyrrhine from the Santa Cruz Formation (Late Early Miocene), Santa Cruz Province, Argentina

Journal Article Ameghiniana · January 1, 2022 We describe a well-preserved humerus of Homunculus patagonicus, a stem platyrrhine from the late early Miocene of the Santa Cruz Formation, Santa Cruz Province, Argentina. The distal part of a humerus was collected by Carlos Ameghino and figured in the 19t ... Full text Open Access Cite

Molar sharpness maintained with wear in the early anthropoids Apidium and Aegyptopithecus

Conference AMERICAN JOURNAL OF BIOLOGICAL ANTHROPOLOGY · 2022 Cite

Reconstructing Cenozoic Patagonian biotas using multi-proxy fossil records

Journal Article Journal of South American Earth Sciences · December 1, 2021 The fossil record from Cenozoic sediments provides a great deal of information that has direct bearing on the early assembling of modern Patagonian ecosystems. In this synthesis, we revise selected fossil marine and terrestrial records from the last 66 Ma ... Full text Open Access Cite

Paleoenvironments and paleoecology of the Santa Cruz Formation (early-middle Miocene) along the Río Santa Cruz, Patagonia (Argentina)

Journal Article Journal of South American Earth Sciences · August 1, 2021 The continental early-middle Miocene Santa Cruz Formation (SCF) in Austral Patagonia contains the best record of South American mammalian faunas prior to the Great American Biotic Interchange (GABI) and is of particular interest because it is the best pres ... Full text Open Access Cite

Leonard B. Radinsky (1937–1985), Radical Biologist

Journal Article Journal of Mammalian Evolution · March 1, 2021 Trained in vertebrate paleontology, Leonard Radinsky (1937–1985) made signal contributions to the study of form and function in paleobiology. Here, I review Radinsky’s contributions and philosophy in the context of developments during the 1960s and 1970s, ... Full text Open Access Cite

Insights on the controls on floodplain-dominated fluvial successions: A perspective from the early–middle miocene santa cruz formation in río chalía (patagonia, argentina)

Journal Article Journal of the Geological Society · January 1, 2021 The Santa Cruz Formation (SCF) in Río Chalía (Austral Basin, Patagonia, Argentina) is a well-exposed fluvial succession with abundant and diverse fossil vertebrates accumulated during the Miocene Climatic Optimum (MCO). Using facies analysis, characterizat ... Full text Open Access Cite

The record of the typothere Pachyrukhos (Mammalia, Notoungulata) and the Chinchillid Prolagostomus (Mammalia, Rodentia) in the Santa Cruz Formation (early-middle Miocene) south to the Río Coyle, Patagonia, Argentina

Journal Article Publicacion Electronica de la Asociacion Paleontologica Argentina · January 1, 2021 The continental early-middle Miocene Santa Cruz Formation (SCF) from Patagonia is one of the most important stratigraphic units of southern South America in terms of the terrestrial Neogene record. Its fossil content was pivotal for establishing the succes ... Full text Open Access Cite

Testing the hypothesis of an impoverished predator guild in the Early Miocene ecosystems of Patagonia: An analysis of meat availability and competition intensity among carnivores

Journal Article Palaeogeography, Palaeoclimatology, Palaeoecology · September 15, 2020 Featured Publication The lower Miocene Santa Cruz Formation (dated to ~18–16 Ma) of Southern Patagonia, Argentina, preserves rich vertebrate faunas, which are representative of communities that existed prior to the Great American Biotic Interchange (GABI). Some previous resear ... Full text Open Access Cite

Patagonian Aridification at the Onset of the Mid-Miocene Climatic Optimum

Journal Article Paleoceanography and Paleoclimatology · September 1, 2020 Featured Publication Fossil-rich sediments of the Santa Cruz Formation, Patagonia, Argentina, span the initiation of the Miocene Climatic Optimum (MCO), the most recent period of warm and wet conditions in the Cenozoic. These conditions drove the expansion of tropical and subt ... Full text Open Access Cite

Dental topographic change with macrowear and dietary inference in Homunculus patagonicus.

Journal Article Journal of human evolution · July 2020 Featured Publication Homunculus patagonicus is a stem platyrrhine from the late Early Miocene, high-latitude Santa Cruz Formation, Argentina. Its distribution lies farther south than any extant platyrrhine species. Prior studies on the dietary specialization of Homunculus sugg ... Full text Open Access Cite

Fruit Selectivity in Anthropoid Primates: Size Matters

Journal Article International Journal of Primatology · June 1, 2020 Featured Publication Certain features of both extant and fossil anthropoid primates have been interpreted as adaptations to ripe fruit foraging and feeding particularly spatulate incisors and trichromatic color vision. Here, we approach the question of anthropoid fruit foragin ... Full text Open Access Cite

An improved approach to age-modeling in deep time: Implications for the Santa Cruz Formation, Argentina

Journal Article Bulletin of the Geological Society of America · January 1, 2020 Accurate age-depth models for proxy records are crucial for inferring changes to the environment through space and time, yet traditional methods of constructing these models assume unrealistically small age uncertainties and do not account for many geologi ... Full text Open Access Cite

A diminutive Pliocene guenon from Kanapoi, West Turkana, Kenya.

Journal Article Journal of human evolution · October 2019 Although modern guenons are diverse and abundant in Africa, the fossil record of this group is surprisingly sparse. In 2012 the West Turkana Paleo Project team recovered two associated molar teeth of a small primate from the Pliocene site of Kanapoi, West ... Full text Open Access Cite

Parvimico materdei gen. et sp. nov.: A new platyrrhine from the Early Miocene of the Amazon Basin, Peru.

Journal Article Journal of human evolution · September 2019 Three field seasons of exploration along the Río Alto Madre de Dios in Peruvian Amazonia have yielded a fauna of micromammals from a new locality AMD-45, at ∼12.8°S. So far we have identified the new primate described here as well as small caviomorph roden ... Full text Open Access Cite

Technical note: Comparing dental topography software using platyrrhine molars.

Journal Article American journal of physical anthropology · May 2019 ObjectivesThere remain many idiosyncrasies among the values calculated for varying dental topography metrics arising from differences in software preferences among research groups. The aim of this work is to compare and provide potential conversio ... Full text Cite

Mammalian faunas, ecological indices, and machine-learning regression for the purpose of paleoenvironment reconstruction in the Miocene of South America

Journal Article Palaeogeography, Palaeoclimatology, Palaeoecology · March 15, 2019 Reconstructing paleoenvironments has long been considered a vital component for understanding community structure of extinct organisms, as well as patterns that guide evolutionary pathways of species and higher-level taxa. Given the relative geographic and ... Full text Open Access Cite

Intraspecific variation in semicircular canal morphology-A missing element in adaptive scenarios?

Journal Article American journal of physical anthropology · January 2019 ObjectivesRecent evidence suggests that the amount of intraspecific variation in semicircular canal morphology may, itself, be evidence for varying levels of selection related to locomotor demands. To determine the extent of this phenomenon across ... Full text Open Access Cite

Correction: First record of the Miocene hominoid Sivapithecus from Kutch, Gujarat state, western India.

Journal Article PloS one · January 2019 [This corrects the article DOI: 10.1371/journal.pone.0206314.]. ... Full text Cite

New primates from the Río Santa Cruz and Río Bote (Early-Middle Miocene), Santa Cruz Province, Argentina

Journal Article Publicacion Electronica de la Asociacion Paleontologica Argentina · January 1, 2019 Four specimens of primates were collected from the Santa Cruz Formation (Early-Middle Miocene) during expeditions undertaken by the Museo de la Plata, Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”, and Duke University in 2013, 2014, and 2017 ... Full text Open Access Cite

Analysis of the Early-Middle Miocene mammal associations at the Río Santa Cruz (Patagonia, Argentina)

Journal Article Publicacion Electronica de la Asociacion Paleontologica Argentina · January 1, 2019 The Santa Cruz Formation (SCF) records high latitude terrestrial paleoecosystems in the Southern Hemisphere during Burdigalian-early Langhian times (Early-Middle Miocene). Mammalian fossils from Río Santa Cruz (RSC) localities were first collected in the l ... Full text Open Access Cite

Historical background for a revision of the paleontology of the Santa Cruz formation (Early–Middle Miocene) along the rÍo Santa Cruz, Patagonia, Argentina

Journal Article Publicacion Electronica de la Asociacion Paleontologica Argentina · January 1, 2019 In 1887, Carlos Ameghino carried out the first geological and paleontological expedition to the Río Santa Cruz (RSC), Patagonia, Argentina. Between 1887 and 1889, Florentino Ameghino studied the fossils obtained by Carlos, founding more than 120 taxa and e ... Full text Open Access Cite

Adaptive wear-based changes in dental topography associated with atelid (Mammalia: Primates) diets

Journal Article Biological Journal of the Linnean Society · August 1, 2018 Primates are generally characterized by low-crowned, brachydont molars relative to many other groups of mammals. This conservative architecture may create special challenges for maintaining dental functionality in the case of a diet requiring proficient sh ... Full text Open Access Cite

100 years of primate paleontology.

Journal Article American journal of physical anthropology · April 2018 Full text Open Access Cite

New Early Miocene primate bearing faunal assemblage from the Alto Madre de Dios, Peru

Conference AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY · April 1, 2018 Link to item Cite

Dental Topography and Food Processing in Wild-Caught Costa Rican Alouatta

Conference AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY · April 1, 2018 Link to item Cite

First record of the Miocene hominoid Sivapithecus from Kutch, Gujarat state, western India.

Journal Article PloS one · January 2018 Hominoid remains from Miocene deposits in India and Pakistan have played a pivotal role in understanding the evolution of great apes and humans since they were first described in the 19th Century. We describe here a hominoid maxillary fragment preserving t ... Full text Open Access Cite

Smooth operator: The effects of different 3D mesh retriangulation protocols on the computation of Dirichlet normal energy.

Journal Article American journal of physical anthropology · May 2017 ObjectivesDirichlet normal energy (DNE) is a metric of surface topography that has been used to evaluate the relationship between the surface complexity of primate cheek teeth and dietary categories. This study examines the effects of different 3D ... Full text Open Access Cite

Are there any African Platyrrhines?

Conference AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY · April 1, 2017 Link to item Cite

Tooth morphology, wear and diet in australopithecus and paran thropus from Southern Africa

Chapter · January 1, 2017 For over 30 years, the dietary proclivities of the australopithecines have been the subject of considerable study and debate. The longevity of these debates is understandable because the question of diet is central to the construction of viable models of e ... Full text Cite

Introducing molaR: a New R Package for Quantitative Topographic Analysis of Teeth (and Other Topographic Surfaces)

Journal Article Journal of Mammalian Evolution · December 1, 2016 Researchers studying mammalian dentitions from functional and adaptive perspectives increasingly have moved towards using dental topography measures that can be estimated from 3D surface scans, which do not require identification of specific homologous lan ... Full text Open Access Cite

Wear and its effects on dental topography measures in howling monkeys (Alouatta palliata).

Journal Article American journal of physical anthropology · December 2016 ObjectivesThree dental topography measurements: Dirichlet Normal Energy (DNE), Relief Index (RFI), and Orientation Patch Count Rotated (OPCR) are examined for their interaction with measures of wear, within and between upper and lower molars in Al ... Full text Open Access Cite

Stem members of Platyrrhini are distinct from catarrhines in at least one derived cranial feature.

Journal Article Journal of human evolution · November 2016 The pterion, on the lateral aspect of the cranium, is where the zygomatic, frontal, sphenoid, squamosal, and parietal bones approach and contact. The configuration of these bones distinguishes New and Old World anthropoids: most extant platyrrhines exhibit ... Full text Open Access Cite

U-Pb geochronology of the Santa Cruz Formation (early Miocene) at the Río Bote and Río Santa Cruz (southernmost Patagonia, Argentina): Implications for the correlation of fossil vertebrate localities

Journal Article Journal of South American Earth Sciences · October 1, 2016 The early Miocene Santa Cruz Formation (SCF) in southern Patagonia hosts the Santacrucian South American Land Mammal Age (SALMA), whose age is known mainly from exposures along the Atlantic coast. Zircon U-Pb ages were obtained from intercalated tuffs from ... Full text Open Access Cite

Internal carotid arterial canal size and scaling in Euarchonta: Re-assessing implications for arterial patency and phylogenetic relationships in early fossil primates.

Journal Article J Hum Evol · August 2016 Primate species typically differ from other mammals in having bony canals that enclose the branches of the internal carotid artery (ICA) as they pass through the middle ear. The presence and relative size of these canals varies among major primate clades. ... Full text Open Access Link to item Cite

Quantitative Occlusal Surface Complexity Metrics and Dental Wear in Alouatta palliata

Conference AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY · March 1, 2016 Link to item Cite

Environmental Variation Explains Mammalian Niche Structure in Central and South America

Conference AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY · March 1, 2016 Link to item Cite

The influence of brain size on canal radius of curvature

Conference AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY · March 1, 2016 Link to item Cite

Dust in the wind: How climate variables and volcanic dust affect rates of tooth wear in Central American howling monkeys.

Journal Article American journal of physical anthropology · February 2016 ObjectivesTwo factors have been considered important contributors to tooth wear: dietary abrasives in plant foods themselves and mineral particles adhering to ingested food. Each factor limits the functional life of teeth. Cross-population studies ... Full text Open Access Cite

Paleoenvironmental reconstruction of the coastal Monte Léon and Santa Cruz formations (Early Miocene) at Rincón del Buque, Southern Patagonia: A revisited locality

Journal Article Journal of South American Earth Sciences · July 1, 2015 Sedimentological, ichnological and paleontological analyses of the Early Miocene uppermost Monte León Formation and the lower part of the Santa Cruz Formation were carried out in Rincón del Buque (RDB), a fossiliferous locality north of Río Coyle in Santa ... Full text Open Access Cite

Anthropology. New World monkey origins.

Journal Article Science (New York, N.Y.) · March 2015 Full text Open Access Cite

Intraspecific Semicircular Canal Variance-A Missing Element in Adaptive Scenarios?

Conference AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY · March 1, 2015 Link to item Cite

Environmental Variables Affecting Primate Species Richness in the Neotropics

Conference AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY · March 1, 2015 Link to item Cite

Biogeography in deep time - What do phylogenetics, geology, and paleoclimate tell us about early platyrrhine evolution?

Journal Article Mol Phylogenet Evol · January 2015 Molecular data have converged on a consensus about the genus-level phylogeny of extant platyrrhine monkeys, but for most extinct taxa and certainly for those older than the Pleistocene we must rely upon morphological evidence from fossils. This raises the ... Full text Open Access Link to item Cite

The effect of differences in methodology among some recent applications of shearing quotients.

Journal Article American journal of physical anthropology · January 2015 A shearing quotient (SQ) is a way of quantitatively representing the Phase I shearing edges on a molar tooth. Ordinary or phylogenetic least squares regression is fit to data on log molar length (independent variable) and log sum of measured shearing crest ... Full text Open Access Cite

Dietary inference from upper and lower molar morphology in platyrrhine primates.

Journal Article PloS one · January 2015 The correlation between diet and dental topography is of importance to paleontologists seeking to diagnose ecological adaptations in extinct taxa. Although the subject is well represented in the literature, few studies directly compare methods or evaluate ... Full text Open Access Cite

Oldest known cranium of a juvenile New World monkey (Early Miocene, Patagonia, Argentina): implications for the taxonomy and the molar eruption pattern of early platyrrhines.

Journal Article Journal of human evolution · September 2014 A juvenile cranium of Homunculus patagonicus Ameghino, 1891a from the late Early Miocene of Santa Cruz Province (Argentina) provides the first evidence of developing cranial anatomy for any fossil platyrrhine. The specimen preserves the rostral part of the ... Full text Open Access Cite

An exceptionally well-preserved skeleton of Palaeothentes from the Early Miocene of Patagonia, Argentina: new insights into the anatomy of extinct paucituberculatan marsupials

Journal Article Swiss Journal of Palaeontology · July 1, 2014 During the Cenozoic paucituberculatans were much more diverse taxonomically and ecomorphologically than the three extant genera of shrew-like marsupials. Among paucituberculatans, palaeothentids were abundant during the Early Miocene, although most of the ... Full text Open Access Cite

Dental topography of platyrrhines and prosimians: convergence and contrasts.

Conference American journal of physical anthropology · January 2014 Dental topographic analysis is the quantitative assessment of shape of three-dimensional models of tooth crowns and component features. Molar topographic curvature, relief, and complexity correlate with aspects of feeding behavior in certain living primate ... Full text Cite

Fossil localities of the Santa Cruz Formation (Early Miocene, Patagonia, Argentina) prospected by Carlos Ameghino in 1887 revisited and the location of the Notohippidian

Journal Article Journal of South American Earth Sciences · January 1, 2014 Between January and September of 1887 Carlos Ameghino carried out his first geologic and paleontological expedition to the Río Santa Cruz, Patagonia. Based on the fossils and geologic information compiled, in 1887 and 1889, Florentino Ameghino named more t ... Full text Open Access Cite

Additional Vertebrate Remains from the Early Miocene of Kutch, Gujarat

Journal Article Special Publication of the Paleontological Society of India · 2014 Open Access Cite

Localidades fosilíferas de la Formación Santa Cruz (Mioceno Inferior) en el margen meridional del valle del río Santa Cruz, provincia de Santa Cruz, Argentina

Conference X Congreso Argentino de Paleontología y Bioestratigrafía y VII Congreso Latinoamericano de Paleontología · 2013 Cite

Semicircular canal morphology as a predictor of platyrrhine locomotor behavior.

Conference AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY · January 1, 2013 Link to item Cite

Locomotor head movements and semicircular canal morphology in primates.

Journal Article Proc Natl Acad Sci U S A · October 30, 2012 Animal locomotion causes head rotations, which are detected by the semicircular canals of the inner ear. Morphologic features of the canals influence rotational sensitivity, and so it is hypothesized that locomotion and canal morphology are functionally re ... Full text Open Access Link to item Cite

Evidence for an Asian origin of stem anthropoids.

Journal Article Proceedings of the National Academy of Sciences of the United States of America · June 2012 Full text Open Access Cite

Testing a developmental model in the fossil record: Molar proportions in South American ungulates

Journal Article Paleobiology · March 1, 2012 A developmental model, based upon murine rodents, has been proposed by Kavanagh et al. (2007) to explain lower molar proportions in mammals. We produce a clade-wide macroevolutionary test of the model using the dental evolutionary trends in a unique radiat ... Full text Open Access Cite

Dietary quality and encephalization in platyrrhine primates.

Journal Article Proceedings. Biological sciences · February 2012 The high energetic costs of building and maintaining large brains are thought to constrain encephalization. The 'expensive-tissue hypothesis' (ETH) proposes that primates (especially humans) overcame this constraint through reduction of another metabolical ... Full text Open Access Cite

Predicting locomotion from the primate semicircular canal system

Journal Article Proceedings of the National Academy (USA) · 2012 Open Access Cite

Dental morphology and dietary adaptation in Homunculus patagonicus.

Conference AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY · January 1, 2012 Link to item Cite

ORIGIN OF THE GREATER ANTILLEAN PRIMATE FAUNA

Conference JOURNAL OF VERTEBRATE PALEONTOLOGY · January 1, 2012 Link to item Cite

ENDOCAST SHAPE AND BRAIN PROPORTIONS IN PRIMATES

Conference JOURNAL OF VERTEBRATE PALEONTOLOGY · January 1, 2012 Link to item Cite

New perspectives on anthropoid origins.

Journal Article Proceedings of the National Academy of Sciences of the United States of America · March 2010 Adaptive shifts associated with human origins are brought to light as we examine the human fossil record and study our own genome and that of our closest ape relatives. However, the more ancient roots of many human characteristics are revealed through the ... Full text Cite

Darwinius masillae is a European middle Eocene stem strepsirrhine.

Journal Article Journal of Human Evolution · 2010 Cite

Tooth root size, chewing muscle leverage, and the biology of Homunculus patagonicus (Primates) from the late early Miocene of Patagonia

Journal Article Ameghiniana · January 1, 2010 Inferences about the diet of Miocene platyrrhine monkeys have relied upon the morphology of the molar teeth, specifically the crests on the molars. Using a library of Micro-CT images of a broad comparative sample of living platyrrhines (callitrichines, ceb ... Full text Open Access Cite

A baseline paleoecological study for the Santa Cruz Formation (late-early Miocene) at the Atlantic Coast of Patagonia, Argentina

Journal Article Palaeogeography, Palaeoclimatology, Palaeoecology · January 1, 2010 Coastal exposures of the Santa Cruz Formation (late-early Miocene, southern Patagonia, Argentina) between the Coyle and Gallegos rivers have been a fertile ground for recovery of Miocene vertebrates for more than 100 years. The formation contains an except ... Full text Open Access Cite

Predominance of orthal masticatory movements in the early Miocene Eucholaeops (Mammalia, Xenarthra, Tardigrada, Megalonychidae) and other megatherioid sloths

Journal Article Journal of Vertebrate Paleontology · December 1, 2009 The megatherioid sloths from the Santa Cruz Formation (Santacrucian Age; early-middle Miocene, Patagonia, southernmost South America) occupy basal positions in the most recent phylogenetic schemes. The cranial morphology of Eucholaeops, particularly of the ... Full text Cite

Much Hype and Many Errors The Link Uncovering Our Earliest Ancestor by Colin Tudge, with Josh Young Little, Brown, New York, 2009. 304 pp. $25.99, C$28.99. ISBN 9780316070089.

Journal Article Science · August 28, 2009 This account of Darwinius masillae , its discovery, and its importance was rushed into print as part of the hype surrounding the public announcement of the work. ... Full text Cite

Much hype and many errors

Other Science · 2009 Cite

Dietary quality and brain size in platyrrhines: support for the "Expensive Tissue Hypothesis".

Conference AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY · January 1, 2009 Link to item Cite

Systematic characterization of locomotor head movements in Lemur catta

Journal Article AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY · January 1, 2009 Link to item Cite

Technical note: Dental microwear textures of "Phase I" and "Phase II" facets.

Journal Article American journal of physical anthropology · December 2008 The power stroke of mastication has been traditionally divided into two parts, one which precedes centric occlusion, and the other which follows it-"Phase I" and "Phase II," respectively. Recent studies of primate mastication have called into question the ... Full text Cite

The oldest Asian record of Anthropoidea.

Journal Article Proceedings of the National Academy of Sciences of the United States of America · August 2008 Undisputed anthropoids appear in the fossil record of Africa and Asia by the middle Eocene, about 45 Ma. Here, we report the discovery of an early Eocene eosimiid anthropoid primate from India, named Anthrasimias, that extends the Asian fossil record of an ... Full text Cite

Two new fossil vertebrate localities in the Santa Cruz Formation (late early - early middle Miocene, Argentina), ∼51° South latitude

Journal Article Journal of South American Earth Sciences · March 1, 2008 Two new fossil vertebrate localities are described from the Santa Cruz Formation (late early - early middle Miocene) of coastal Patagonia. They are noteworthy because they are the lowest stratigraphically of any precisely recorded in coastal Santa Cruz Pro ... Full text Cite

The anatomy of Dolichocebus gaimanensis, a stem platyrrhine monkey from Argentina.

Journal Article Journal of human evolution · March 2008 Dolichocebus is known from the type skull encased in a concretion, numerous isolated teeth, parts of two mandibles, and a talus. The specimens come from the Trelew Member (early Miocene, Colhuehuapian South American Land Mammal Age) of the Sarmiento Format ... Full text Cite

Low magnification dental microwear: The problem of postmortem artifacts

Conference Journal of Vertebrate Paleontology · 2008 Cite

Comparisons of dental microwear texture attributes between facets in three primate taxa

Conference AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY · January 1, 2008 Link to item Cite

A new generalized paucituberculatan marsupial from the oligocene of Bolivia and the origin of 'shrew-like' opossums

Journal Article Palaeontology · September 1, 2007 Insights into the origin of 'shrew-like' oposssums of South America are gained thanks to a new fossil from the Oligocene Salla Beds in Bolivia. The specimen described here consists of a partial rostrum, palate and postcanine teeth, and shows several genera ... Full text Cite

South American metatherians from the begining of the neogene (Early Miocene, Colhuehuapan Land-mammal Age). Part 1: Introduction, didelphimorphia and sparassodonta

Journal Article Ameghiniana · March 30, 2007 This work is the first, of a series of three, taxonomic reviews of the Early Miocene (Colhuehuapian Land-mammal Age) South American metatherians. Colhuehuapian levels from the Gran Barranca south of the Colhue Huapi lake (Sarmiento Department, Chubut Provi ... Cite

Evaluaing hearing sensitivity in Homunculus patagonicus

Journal Article American Journal of Physical Anthropology · 2007 Cite

A new species of Hathliacynidae (Metatheria, Sparassodonta) from the middle Miocene of Quebrada Honda, Bolivia

Journal Article Journal of Vertebrate Paleontology · September 11, 2006 A new species of Hathliacynidae (Sparassodonta, Metatheria), Acyon myctoderos, from the middle Miocene of Quebrada Honda, Bolivia, is described. This new species is the largest known hathliacynid. Compared to the type species of the genus, A. tricuspidatus ... Full text Cite

The armadillos (Mammalia, Xenarthra, Dasypodidae) of the Santa Cruz Formation (early-middle Miocene): An approach to their paleobiology

Journal Article Palaeogeography, Palaeoclimatology, Palaeoecology · August 4, 2006 The Santacrucian (early-middle Miocene) fauna is exceptional in its richness (over 70 species recorded in 21 stratigraphic levels). In this contribution we attempt a preliminary paleobiological characterization of the armadillos (Dasypodidae and Peltephili ... Full text Cite

New platyrrhine monkeys from the Solimões Formation (late Miocene, Acre State, Brazil).

Journal Article Journal of human evolution · June 2006 We report here a new fossil primate from the late Miocene of Brazil. The material consists of a lower first molar and a maxilla with P3-4. The fossils were collected in the Solimões Formation at the locality of Patos, upper Acre River, Acre State, Brazil. ... Full text Cite

Applications of X-ray synchrotron microtomography for non-destructive 3D studies of paleontological specimens

Journal Article Applied Physics A: Materials Science and Processing · May 1, 2006 Paleontologists are quite recent newcomers among the users of X-ray synchrotron imaging techniques at the European Synchrotron Radiation Facility (ESRF). Studies of the external morphological characteristics of a fossil organism are not sufficient to extra ... Full text Cite

Morfología y paleobiología de vertebrados. Aplicación a los mamíferos de la Formación Santa Cruz (Mioceno temprano-medio), Patagonia, Argentina

Conference IX Congreso Argentino de Paleontología y Bioestratigrafía, 18 -22 de septiembre, Córdoba, Argentina · 2006 Cite

The armadillos (Mammalia, Xenarthra, Dasypodidae) of the Santa Cruz formation (early-middle Miocene)

Journal Article Palaeogeography, Palaeoclimatology and Paleoecology · 2006 Cite

Paranasal pneumatization in the early Miocene platyrrhine Homunculus patagonicus

Conference AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY · January 1, 2006 Link to item Cite

The role of binocular vision in primate locomotion.

Conference AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY · January 1, 2006 Link to item Cite

A synopsis of the phylogeny and paleobiology of Amphipithecidae, South Asian middle and late Eocene primates

Journal Article Anthropological Science · April 1, 2005 Amphipithecidae of late middle Eocene to late Eocene of Myanmar and Thailand is a phylogenetically enigmatic group that some place with Anthropoidea and others with Adapoidea. A linkage with adapoids is hard to demonstrate because it relies largely on a se ... Full text Cite

Olfactory fossa of Tremacebus harringtoni (platyrrhini, early Miocene, Sacanana, Argentina): implications for activity pattern.

Journal Article The anatomical record. Part A, Discoveries in molecular, cellular, and evolutionary biology · November 2004 CT imaging was undertaken on the skull of approximately 20-Myr-old Miocene Tremacebus harringtoni. Here we report our observations on the relative size of the olfactory fossa and its implications for the behavior of Tremacebus. The endocranial surface of T ... Full text Cite

Climate stability across the Eocene-Oligocene transition, southern Argentina

Journal Article Geology · July 1, 2004 Fossil mammal teeth from mid-latitude southern Argentina (∼46°S) that closely bracket the Eocene-Oligocene transition show no resolvable change in oxygen isotope compositions. In combination with paleofloral observations and geographic considerations, this ... Full text Cite

Anthropoid Origins

Book · January 1, 2004 Thissecond editionwill be an edited volume of interest to those who do research and teach about the evolution of primates. ... Cite

Nuevos hallazgos entre los más antiguos roedores de América del Sur: una dispersion post-transición Eoceno-Oligoceno

Conference Resumenes de Comunicaciones de la Asociación Argentina de Paleontologia (Diamante, Argentina) · 2004 Cite

Aspectos paleoambientales de la Formacion Santa Cruz (Mioeno temprano-medio) en Killik Aike Norte, Patagonia, Argentina

Journal Article Asociacion Paleontologica Argentina, Reunin Anual de Communicaciones · 2004 Cite

Discontinuidades estratigráficas de la Formación Sarmiento en Gran Barranca (Patagonia central): evaluación preliminary de la integridad de su registro

Journal Article Resumenes de Comunicaciones de la Asociación Argentina de Paleontologia (Diamante, Argentina) · 2004 Cite

The paleobiology of Amphipithecidae, South Asian late Eocene primates.

Journal Article Journal of human evolution · January 2004 Analysis of the teeth, orbital, and gnathic regions of the skull, and fragmentary postcranial bones provides evidence for reconstructing a behavioral profile of Amphipithecidae: Pondaungia, Amphipithecus, Myanmarpithecus (late middle Eocene, Myanmar) and S ... Full text Cite

Back to the future

Conference Evolutionary Anthropology: Issues, News, and Reviews · January 2004 Full text Cite

The primate fossil record

Other American Journal of Human Biology · November 2003 Full text Cite

Hypoglossal canal size in living hominoids and the evolution of human speech.

Journal Article Human biology · August 2003 The relative size of the hypoglossal canal has been proposed as a useful diagnostic tool for the identification of human-like speech capabilities in the hominid fossil record. Relatively large hypoglossal canals (standardized to oral cavity size) were obse ... Full text Cite

Comment on "Grasping primate origins".

Other Science (New York, N.Y.) · May 2003 Full text Cite

Cranial evidence for the timing of the catarrhine-platyrrhine divergence.

Journal Article American Journal of Physical Anthropology · 2003 Cite

New Palaeothentid marsupial from the middle Miocene of Bolivia

Journal Article Palaeontology · January 1, 2003 The new species Acdestis maddeni is described based on the most complete skull of a palaeothentid marsupial known so far. The skull preserves most of the upper dentition and of the ear region, the latter an anatomical region previously unknown in this exti ... Full text Cite

Cranial evidence for the timing of the platyrrhine-catarrhine divergence.

Conference AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY · January 1, 2003 Link to item Cite

A Mustersan Paleosol bearing land microgastropods (Charopidae) from the Sarmiento Formation, Eocene of Central Patagonia: Climatic implications

Journal Article Ameghiniana · December 30, 2002 The lower section of Puesto Almendra Member (Sarmiento Formation) at Gran Barranca (Chubut province, Argentina), is composed of tuffs, tuffaceous paleosols and fluvial sandstones and intraformational conglomerates of latest Middle Eocene age. In the lower ... Cite

The upper dentition and face of Pondaungia cotteri from central Myanmar.

Journal Article Journal of human evolution · August 2002 A specimen of Pondaungia from the late middle Eocene Pondaung Formation in central Myanmar includes maxillary fragments and parts of the dentition, some hitherto undocumented, including the upper central incisor, canine, premolars and molars. Pondaungia ha ... Full text Cite

Pondaungia cotteri, a slow moving primate seed predator from the Eocene of South Asia

Journal Article American Journal of Physical Anthropology · 2002 Cite

A Mustersan Paleosol bearing land microgastropods (Charopidae) from the Sarmiento Formation, Eocene of Central Patagonia: Climatic implications

Journal Article Ameghiniana · 2002 The lower section of Puesto Almendra Member (Sarmiento Formation) at Gran Barranca (Chubut province, Argentina), is composed of tuffs, tuffaceous paleosols and fluvial sandstones and intraformational conglomerates of latest Middle Eocene age. In the lower ... Cite

Activity patterns of subfossil lemurs: evidence based on the relative size of the optic canal.

Journal Article AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY · January 1, 2002 Link to item Cite

The Mustersan interval at Gran Barranca

Journal Article Ameghiniana · 2001 Cite

A comparative test of adaptive explanations for hypsodonty in ungulates and rodents

Journal Article Journal of Mammalian Evolution · January 1, 2001 Hypsodonty has long been recognized as an adaptation for grazing: grazing is suggested to increase tooth wear due to endogenous (e.g., fiber, silica) and/or exogenous (e.g., dust, grit) properties of ingested food. However, it is unknown whether tooth crow ... Full text Cite

Osteological evidence for the evolution of activity pattern and visual acuity in primates.

Journal Article American journal of physical anthropology · October 2000 Examination of orbit size and optic foramen size in living primates reveals two adaptive phenomena. First, as noted by many authors, orbit size is strongly correlated with activity pattern. Comparisons of large samples of extant primates consistently revea ... Full text Cite

Oligocene

Chapter · 2000 Cite

Fayum

Chapter · 2000 Cite

Ostological evidence for the evolution of activity pattern and visual acuity in primates

Journal Article American Journal of Physical Anthropology · 2000 Cite

Oligopithecidae

Chapter · 2000 Cite

Diet

Chapter · 2000 Cite

Parapithecidae

Chapter · 2000 Cite

Teeth

Chapter · 2000 Cite

Cranial anatomy and palaeobiology of the Miocene marsupial Hondalagus altiplanensis and a phylogeny of Argyrolagids

Journal Article Palaeontology · January 1, 2000 New cranial material of Hondalagus altiplanensis, from the middle Miocene of southern Bolivia, allows a rediagnosis of the genus and an assessment of its palaeobiology and phylogenetic relationships with other argyrolagid marsupials. The new specimens demo ... Full text Cite

A new near-shore marine fauna and flora from the early neogene of northwestern Venezuela

Journal Article Journal of Paleontology · January 1, 2000 A diverse near-shore marine fauna existed during the early Miocene in what is today an arid inland region about 90 km south of the Caribbean coast of northern Venezuela, a poorly known area geologically and paleontologically. The fossil locality consists o ... Full text Cite

Revised geochronology of the Casamayoran South American Land Mammal Age: climatic and biotic implications.

Journal Article Proceedings of the National Academy of Sciences of the United States of America · November 1999 Isotopic age determinations (40Ar/39Ar) and associated magnetic polarity stratigraphy for Casamayoran age fauna at Gran Barranca (Chubut, Argentina) indicate that the Barrancan "subage" of the Casamayoran South American Land Mammal "Age" is late Eocene, 18 ... Full text Cite

New notoungulates from the Paleogene at Vilcapujio, Bolivia

Journal Article Journal of Vertebrate Paleontology · 1999 Cite

A comparative test of competing adaptive explanations for hypsodonty in ungulates and rodents

Journal Article Programa y Resúmenes, Evolución Neotropical del Cenozoico,La Paz, Bolivia · 1999 Cite

Proteropithecia, new name for Propithecia

Journal Article American Juurnal of Primatology · 1999 Cite

Phylogenetic analysis of anthropoid relationships.

Journal Article Journal of human evolution · September 1998 The relationships of anthropoids to other primates are currently debated, as are the relationships among early fossil anthropoids and crown anthropoids. To resolve these issues, data on 291 morphological characters were collected for 57 taxa of living and ... Full text Cite

The hypoglossal canal and the origin of human vocal behavior.

Journal Article Proceedings of the National Academy of Sciences of the United States of America · April 1998 The mammalian hypoglossal canal transmits the nerve that supplies the muscles of the tongue. This canal is absolutely and relatively larger in modern humans than it is in the African apes (Pan and Gorilla). We hypothesize that the human tongue is supplied ... Full text Cite

The hypoglossal canal and the origins of human vocal behavior

Journal Article American Journal of Physical Anthropology · 1998 Cite

Geochronologic age of the casamayoran fauna at Gran Barranca, Chubut Province, Argentina

Conference Congreso Argentino de Paleontologia y Biostratigrafia · 1998 Cite

A new pitheciin primate from the middle Miocene of Argentina.

Journal Article American journal of primatology · January 1998 We report here a new fossil primate from the middle Miocene of Argentina. The material consists of isolated teeth, mandibular fragments, and a talus. The fossils were collected in the Collón Cura formation at Cañadón del Tordillo in Neuquén Province. An ag ... Full text Cite

Revised age of the salla beds, Bolivia, and its bearing on the age of the deseadan South American land mammal “age”

Journal Article Journal of Vertebrate Paleontology · January 1, 1998 The Salla beds of Bolivia contain a mammalian faunal assemblage assigned to the Deseadan South American Land Mammal “Age” (SALMA), known elsewhere principally in Patagonia. The earliest platyrrhine monkey Branisella comes from a single stratigraphie level ... Full text Cite

Cladistic analysis and anthropoid origins - Response

Journal Article SCIENCE · December 19, 1997 Link to item Cite

Primate species richness is determined by plant productivity: implications for conservation.

Journal Article Proceedings of the National Academy of Sciences of the United States of America · November 1997 The explanation of patterns in species richness ranks among the most important tasks of ecology. Current theories emphasize the interaction between historical and geographical factors affecting the size of the regional species pool and of locally acting pr ... Full text Cite

Nuciruptor rubricae, a new pitheciin seed predator from the Miocene of Colombia.

Journal Article American journal of physical anthropology · March 1997 A new genus and species of platyrrhine primate, Nuciruptor rubricae, are added to the increasingly diverse primate fauna from the middle Miocene of La Venta, Columbia. This species displays a number of dental and gnathic features indicating that it is rela ... Full text Cite

Mammals and rainfall: paleoecology of the middle Miocene at La Venta (Colombia, South America).

Journal Article Journal of human evolution · February 1997 A comparison of the species richness and macroniche composition of diet, locomotor and body-size classes among 16 nonvolant mammalian faunas in tropical South America reveals numerous significant positive correlations with rainfall. In particular, signific ... Full text Cite

Anthropoid origins.

Journal Article Science (New York, N.Y.) · February 1997 Recent fossil discoveries have greatly increased our knowledge of the morphology and diversity of early Anthropoidea, the suborder to which humans belong. Phylogenetic analysis of Recent and fossil taxa supports the hypotheses that a haplorhine-strepsirrhi ... Full text Cite

The evolution of the Altiplano-Puna Plateau of the central Andes

Journal Article Annual Review of Earth and Planetary Sciences · 1997 Cite

A skull of proargyrolagus, the oldest argyrolagid (late oligocene salla beds, bolivia), with brief comments concerning its paleobiology

Journal Article Journal of Vertebrate Paleontology · January 1, 1997 A skull of the oldest described argyrolagid, Proargyrolagus bolivianus (late Oligocene of the Salla Beds, Bolivia) allows an assessment of the phylogeny of this group and a reconstruction of its paleobiology. Several aspects of the cranial anatomy of the M ... Full text Cite

Dental evidence for diets of Miocene apes

Conference American Journal of Physical Anthropology · 1996 Cite

The evolution of diet in Old World monkeys

Journal Article American Journal of Physical Anthropology · 1996 Cite

New platyrrhines from the middle Miocene of Argentina

Conference American Journal of Physical Anthropology · 1996 Cite

Nuevos mamíferos de la Formación Chinches (Mioceno) de la Cordillera Frontal de San Juan, Argentina

Journal Article Resúmenes, XII Jornadas Argentinas de Paleontología de Vertebrados (La Pampa, May 1996) · 1996 Cite

Do phalangeriforms (Marsupialia: Diprotodontia) have a 'hypocone'?

Journal Article Australian Journal of Zoology · January 1, 1996 The identity of some molar cusps of phalangeriform marsupials has been debated, particularly the distolingual cusp of the upper molars, called the metaconule or hypocone by different workers. Here, we examine the molar teeth of two eutherian and two phalan ... Full text Cite

The dietary adaptations of European Miocene catarrhines.

Journal Article Proceedings of the National Academy of Sciences of the United States of America · June 1995 European Miocene "apes" have been known for nearly a century and a half but their phylogenetic significance is only now becoming apparent with the recent discovery of many relatively complete remains. Some appear to be close in time and morphology to the l ... Full text Cite

A SKULL OF PROARGYROLAGUS. THE OLDEST ARGYROLAGID (EARLY MIOCENE SALLA BEDS, BOLIVIA)

Journal Article JOURNAL OF VERTEBRATE PALEONTOLOGY · January 1, 1995 Link to item Cite

Molar Shear and dietary adaptations of European Miocene catarrhines

Journal Article American Journal of Physical Anthropology · 1995 Cite

Recent finds of monkeys from the Oligocene/Miocene of Salla, Bolivia

Conference American Journal of Physical Anthropology · 1995 Cite

"Giant" tamarin from the Miocene of Colombia.

Journal Article American journal of physical anthropology · November 1994 A nearly complete but badly crushed skull and mandible of Lagonimico conclucatus, gen. et sp. nov. is described from the La Victoria Formation, Colombia. The specimen is of middle Miocene age and dates from about 13.5 Ma. Features of the dentition suggest ... Full text Cite

Cladistics, computers, and character analysis.

Journal Article Evolutionary Anthropology · 1994 Cite

An overview of the paleogeography and paleoecology of the La Venta region

Journal Article American Journal of Physical Anthropology · 1994 Cite

"Giant" Tamarin from the Miocene of Colombia

Journal Article American Journal of Physcial Anthropology · 1994 Cite

The taxon anthropoidea and the crown clade concept

Journal Article Evolutionary Anthropology: Issues, News, and Reviews · January 1, 1994 Full text Cite

Fossil platyrrhines from the Rio Acre local fauna, late Miocene, western Amazonia

Journal Article Journal of Human Evolution · December 1993 Cite

Vertebrate paleontology in the Eocene of Bolivia and the Deseadan of Argentina

Journal Article Journal of Vertebrate Paleontology · 1993 Cite

Tooth form and diet in ateline and alouattine primates: reflections on the comparative method

Journal Article American Journal of Science · January 1, 1993 Folivores (Alouatta, Brachyteles) have relatively small lower incisors and relatively well-developed molar shearing crests compared to frugivores (Ateles, Lagothrix). The development of molar shear crests in the fossil alouattines of the genus Stirtonia is ... Full text Cite

Large fossil platyrrhines from the Rio Acre local fauna, late Miocene, western Amazonia

Journal Article Journal of Human Evolution · January 1, 1993 In September, 1977 and July, 1979, fossil vertebrates were collected at several localities along the Rio Acre west of Inapari, Peru on the border between Brazil and the Departamento de Madre de Dios, Peru, and also between Brazil and Departamento de Pando, ... Full text Cite

A new specimen of pitheciine primate from the Miocene of Colombia

Journal Article American Journal of Physical Anthropology · 1992 Cite

Aportes al conocimiento de la fauna de mamiferos del Grupo Honda, Mioceno, Colombia

Conference IX Jornadas Argeninas de Paleontologia de Vertebrados, Trelew, Chubut · 1992 Cite

Cranial anatomy of Ignacius graybullianus and the affinities of the Plesiadapiformes

Journal Article American Journal of Physical Anthropology · January 1, 1992 A nearly complete cranium of Ignacius graybullianus provides increased understanding of the cranial anatomy of Plesiadapiformes. In nearly all details of cranial anatomy, Ignacius differs markedly from primates. USNM 421608 exhibits a long tapering snout, ... Full text Cite

The Friasian of Patagonia

Journal Article Journal of Vertebrate Paleontology · 1991 Cite

Dietary evolution in platyrrhine primates and the comparative method

Conference Journal of Vertebrate Paleontology · 1991 Cite

Review of Primate Phylogeny by F.E. Grine, J.G. Fleagle and L.B. Martin

Journal Article American Journal of Physical Anthropology · 1991 Cite

New platyrrhine astragalus from the Miocene of Colombia

Conference American Journal of Physical Anthropology · 1991 Cite

Partial humeri of two Miocene Colombian primates.

Journal Article American journal of physical anthropology · March 1990 Distal portions of humeri from two Miocene Colombian primates were recovered during field work in 1986. The larger IGM 183420 is very similar in size and morphology to the humerus included in the type specimen of Cebupithecia sarmientoi, recovered from La ... Full text Cite

A POSSIBLE GIANT TAMARIN FROM THE MIOCENE OF COLOMBIA

Conference AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY · February 1, 1990 Link to item Cite

A NEW PARTIAL SKELETON OF CEBUPITHECIA-SARMIENTOI FROM THE MIOCENE OF COLOMBIA

Journal Article AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY · February 1, 1990 Link to item Cite

Nuevos hallazgos de monos del Mioceno de Colombia

Journal Article Ameghiniana · 1990 Cite

Eocene plesiadapiform shows affinities with flying lemurs not primates

Journal Article Nature · January 1, 1990 PLESIADAPIFORMES, of the North American and European Paleogene, is often identified as a sister group of primates. This hypothesis is based on several proposed anatomical synapo-morphies linking the best-known plesiadapiform families, Plesiadapidae, and Pa ... Full text Cite

The phyletic relationships of extant and fossil Pitheciinae (Platyrrhini, Anthropoidea)

Journal Article Journal of Human Evolution · January 1, 1990 A phylogenetic assessment of Pitheciinae (sensuHershkovitz, 1977) is undertaken. Among the three living genera of pitheciines,Chiropotes andCacajao share a more recent common ancestor than either does withPithecia. Evidence for the position of pitheciines ... Full text Cite

A NEW SMALL PLATYRRHINE FROM THE MIOCENE OF COLOMBIA AND THE PHYLETIC POSITION OF THE CALLITRICHINES

Journal Article AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY · February 1, 1989 Link to item Cite

THE DENTAL MORPHOLOGY OF DOLICHOCEBUS-GAIMANENSIS, A FOSSIL MONKEY FROM ARGENTINA

Journal Article AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY · February 1, 1989 Link to item Cite

NEW STIRTONIA-VICTORIAE MATERIAL FROM THE MIOCENE OF COLOMBIA

Journal Article AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY · February 1, 1989 Link to item Cite

A new "giant" tamarin from the Miocene of Colombia

Journal Article Journal of Vertebrate Paleontology · 1989 Cite

Review of Primate Adaptation and Evolution by J.G. Fleagle

Journal Article Quarterly Review of Biology · 1989 Cite

Sexual selection and canine dimorphism in New World monkeys.

Journal Article American journal of physical anthropology · November 1988 Social and ecological factors are important in shaping sexual dimorphism in Anthropoidea, but there is also a tendency for body-size dimorphism and canine dimorphism to increase with increased body size (Rensch's rule) (Rensch: Evolution Above the Species ... Full text Open Access Cite

Early hominid diets from quantitative image analysis of dental microwear.

Journal Article Nature · June 1988 The dietary habits of the early hominids Australopithecus and Paranthropus have long been debated. Robinson argued that the two species differed in the proportions of meat and vegetables consumed. More recently it has been suggested that Paranthropus, with ... Full text Cite

Sexual dimorphism and dental variability in platyrrhine primates

Journal Article International Journal of Primatology · June 1, 1988 Leutenegger and Cheverud (1982, 1985) propose a hypothesis to explain why larger primates are more sexually dimorphic in body weight and canine size. Their hypothesis states that any factor selecting for an evolutionary increase in body size will produce a ... Full text Cite

THE PHYLOGENETIC POSITION OF PARAPITHECIDAE (PRIMATES, ANTHROPOIDEA)

Journal Article AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY · February 1, 1988 Link to item Cite

Informe general de nuevos descubrimientos en el Mioceno de Colombia y Chile

Journal Article V. Journadas Arg. Paleont. Vert. · 1988 Cite

Phyletic Position of the Pitheciinae

Journal Article Journal of Vertebrate Paleontology · 1988 Cite

Fayum

Chapter · 1988 Cite

Oligocene

Chapter · 1988 Cite

Diet

Chapter · 1988 Cite

Teeth

Chapter · 1988 Cite

Parapithecidae

Chapter · 1988 Cite

Age assessment using cementum annulus counts and tooth wear in a free-ranging population of Macaca mulatta.

Journal Article American journal of primatology · January 1988 Estimates were made of the tooth wear and the number of cementum annuli on lower first molars of Macaca mulatta of known age that had lived on Cayo Santiago, Puerto Rico. It is demonstrated that both these measurements are significantly correlated with age ... Full text Cite

New material of Qatrania from Egypt with comments on the phylogenetic position of the parapithecidae (primates, Anthropoidea).

Journal Article American journal of primatology · January 1988 New material of the early anthropoid primate Qatrania wingi and a new species of that genus are described. Several features of the dental anatomy show that Qatrania, while quite primitive relative to other anthropoids in many ways, is most likely a parapit ... Full text Cite

NEW STIRTONIA-VICTORIAE MATERIAL FROM THE MIOCENE OF COLOMBIA

Conference INTERNATIONAL JOURNAL OF PRIMATOLOGY · October 1, 1987 Link to item Cite

Analysis of primate dental microwear using image processing techniques.

Journal Article Scanning microscopy · June 1987 This paper introduces Fourier transformation as a rapid, replicable means for characterizing and distinguishing patterns of microscopic wear on primate teeth. The two-dimensional power spectra obtained from numerical Fourier transformation are shown to be ... Cite

BEHAVIORAL AND SIZE CORRELATES OF CANINE DIMORPHISM IN PLATYRRHINE PRIMATES

Journal Article AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY · February 1, 1987 Link to item Cite

SEXUAL DIMORPHISM AND DENTAL VARIABILITY AMONG EXTANT PLATYRRHINES

Journal Article AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY · February 1, 1987 Link to item Cite

Primate Evolution, edited by J.G. Else and P.C. Lee

Other Quarterly Review of Biology · 1987 Cite

The phyletic position of the Parapithecidae

Journal Article Journal of Human Evolution · January 1, 1987 The Parapithecidae are a group of primitive anthropoid primates known only from the early Oligocene Jebel Qatrani Formation of Fayum, Egypt. Since the initial discovery of the group early in the century, their phyletic position relative to other higher pri ... Full text Cite

Stirtonia victoriae, a new species of Miocene Colombian primate

Journal Article Journal of Human Evolution · January 1, 1987 Upper jaws and other cranial material of a large primate from the Perico Member of the La Dorada Formation, Honda Group (Miocene) were discovered in 1985 and 1986. The specimens are of a new species of Stirtonia. Based on stratigraphic position, more than ... Full text Cite

A NEW SPECIMEN OF MIOCENE COLOMBIAN STIRTONIA

Journal Article AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY · February 1, 1986 Link to item Cite

Mohanamico hershkovitzi, gen. et sp. nov., un primate du Miocène moyen d'Amérique du Sud

Journal Article Comptes Rendus, Adademie des Sciences (Paris) · 1986 Cite

Miocene characid fishes from Colombia: Evolutionary stasis and extirpation

Journal Article Science · January 1, 1986 Fossil fishes from the Miocene La Venta fauna of the Magdalena River Valley, Colombia, are identified as Colossoma macropomum (Characidae), a living species from the Orinoco and Amazon basins. The fossils document a long and conservative history for a spec ... Cite

( Mohanamico herskovitzi gen. et sp. nov., a middle Miocene South American primate).

Journal Article Comptes Rendus - Academie des Sciences, Series II · January 1, 1986 Mohanamico hershkovitzi was about the size of the living squirrel monkey Saimiri sciureus. Its molars are low-crowned and the molar crests are not pronounced suggesting a frugivorous diet like Aotus. The lateral incisor is large and high-crowned, which for ... Cite

Dental evidence for the diet of Australopithecus.

Journal Article Annual review of anthropology. Vol. 14 · January 1, 1985 Surveys the evidence for australopithecine diets in the light of current knowledge about the diet and dental anatomy of living primates, especially the apes. To provide a backdrop for the functional and adaptive interpretations which form the bulk of the p ... Full text Cite

CEMENTUM ANNULUS COUNTS AND CHRONOLOGICAL AGE IN MACACA-MULATTA

Journal Article AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY · January 1, 1985 Link to item Cite

The Order of Man by Charles Oxnard, review

Journal Article Quarterly Review of Biology · 1984 Cite

Cementum annulus counts provide a means for age determination in Macaca mulatta (primates, anthropoidea).

Journal Article Folia primatologica; international journal of primatology · January 1984 14 teeth of 8 rhesus macaques (Macaca mulatta) of known age were analyzed to assess the usefulness of cementum annuli counts as a means of estimating chronological age. Methods used were histological examination of stained thin sections by light microscopy ... Full text Cite

PORTABLE MICROCOMPUTERS, ELECTRONIC DIGITAL CALIPERS, AND THE COLLECTION OF MORPHOMETRIC DATA

Journal Article AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY · January 1, 1984 Link to item Cite

Dental formulae and dental eruption patterns in Parapithecidae (Primates, Anthropoidea).

Journal Article American journal of physical anthropology · December 1983 The eruption sequence for the lower teeth of Apidium phiomense based on 18 juvenile specimens is dP3, dP4, M1, M2, P2, P4, (P3, M3), C. Only five specimens of Parapithecus grangeri show developing lower teeth. P2, M1, and M2 all erupted before P3 and P4; C ... Full text Cite

Qatrania, new basal anthropoid primate from the Fayum, Oligocene of Egypt

Journal Article Nature · December 1, 1983 Recent excavations in Egypt organized by the Geological Survey of Egypt and Duke University have recovered many fossil primate specimens, most of which come from upper levels of the Jebel Qatrani Formation (early Oligocene) including Aegyptopithecus, Propl ... Full text Cite

True grit: a microwear experiment.

Journal Article American journal of physical anthropology · May 1983 Recently we noted the effects of experimental diets on microscopic dental wear in the American opossum and concluded that it might prove difficult to distinguish the microwear produced by an insectivorous diet from that produced by some kinds of herbivorou ... Full text Cite

RAMAPITHECUS RECLAIMED

Journal Article The Sciences · January 2, 1983 Full text Cite

Sivapithecus simonsi, a new species of miocene hominoid, with comments on the phylogenetic status of the ramapithecinae

Journal Article International Journal of Primatology · June 1, 1982 The Ramapithecinae are an extinct, mainly Miocene group of hominoids, whose relationship to modern taxa is disputed. Some regard them as hominids, while others view them as ancestral to Pongo,or even as the group ancestral to both hominids and extant apes. ... Full text Cite

A model for comparison of masticatory effectiveness in primates.

Journal Article Journal of morphology · May 1982 A model is presented to express how effectively animals increase the exposed surface area of their food by chewing. It includes a coefficient of masticatory effectiveness (E) the value of which increases with effectiveness of exposing new food surface area ... Full text Cite

Habitus and heritage in archaic primates (Plesiadapiformes)

Journal Article International Journal of Primatology · 1982 Cite

Sexual dimorphism in Ramapithecinae.

Journal Article Proceedings of the National Academy of Sciences of the United States of America · January 1982 The Ramapithecinae are an extinct, mainly Miocene group of hominoids comprising the genera Sivapithecus and Gigantopithecus. Ouranopithecus and Ramapithecus are other included genera, here regarded as invalid. Cladistically, ramapithecines are hominid, alt ... Full text Cite

SPECIES NUMBER DETERMINATION AND SPECIMEN ALLOCATION IN FOSSIL SAMPLES

Conference AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY · January 1, 1982 Link to item Cite

Sexual dimorphism in early anthropoids

Journal Article Nature · 1981 Cite

A revision of the Oligocene apes of the Fayum Province, Egypt

Journal Article American Journal of Physical Anthropology · January 1, 1981 Three years of field excavations in the Oligocene strata of the Fayum Province, Egypt, have yielded more than two dozen new jaws and teeth of fossil apes. This material contributes significantly to our understanding of catarrhine systematics and phylogeny. ... Full text Cite

The nut‐crackers – a new theory of the adaptations of the Ramapithecinae

Journal Article American Journal of Physical Anthropology · January 1, 1981 Molar enamel is thicker among frugivorous extant Old World monkeys and apes than among their folivorous close relatives. Furthermore, species that have the thickest molar enamel reportedly eat fruits, seeds, and nuts that are so hard that they cannot be br ... Full text Cite

The ontogeny of premolar dental wear in Cercocebus albigena (cercopithecidae)

Journal Article American Journal of Physical Anthropology · January 1, 1981 The orientation of striated wear facets on primate teeth serves as a useful guide for reconstructing jaw movements during mastication. Most wear facets on the molars are formed during one of the two well‐documented movements, Phase I or Phase II, of the po ... Full text Cite

Sexual dimorphism in early anthropoids.

Journal Article Nature · September 1980 Sexual dimorphism in canine/premolar tooth size and in body size is found among many species of living primates and has been shown to be correlated with social organization. Among extant higher primate species that normally live in the nuclear families con ... Full text Cite

The ecology of Oligocene African Anthropoidea

Journal Article International Journal of Primatology · 1980 Cite

DAWN APE PROVIDES CLUE TO SOCIAL-LIFE

Journal Article GEOTIMES · January 1, 1980 Link to item Cite

Comments on the adaptive strategy of the first African anthropoids.

Journal Article Zeitschrift fur Morphologie und Anthropologie · January 1980 Cite

THE ADAPTIVE SIGNIFICANCE OF ENAMEL THICKNESS WITH IMPLICATIONS FOR HOMINID ORIGINS

Conference AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY · January 1, 1980 Link to item Cite

RECENTLY RECOVERED OLIGOCENE APES FROM EGYPT

Conference AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY · January 1, 1980 Link to item Cite

DENTAL MICROWEAR AND DIET - IMPLICATIONS FOR EARLY HOMINID FEEDING-BEHAVIOR

Journal Article AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY · January 1, 1980 Link to item Cite

Ecology of Oligocene African Anthropoidea

Journal Article American Journal of Physical Anthropology · 1979 Cite

Dietary and dental variations in the genus Lemur, with comments concerning dietary-dental correlations among Malagasy primates.

Journal Article American journal of physical anthropology · July 1978 Field studies of feeding in the lemur subspecies Lemur fulvus rufus and L. f. mayottensis have revealed that feeding patterns within a single species can be markedly different, both regionally and seasonally. Thus L. f. rufus is a dietary specialist (3 pla ... Full text Cite

A model for the comparison of mastication efficiency in primates

Journal Article American Journal of Physical Anthropology · 1978 Cite

MODEL FOR COMPARISON OF MASTICATORY EFFICIENCY IN PRIMATES

Conference AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY · January 1, 1978 Link to item Cite

Diets of early Miocene African hominoids

Journal Article Nature · December 1, 1977 MOST reviewers of East African early Miocene apes have been impressed by their similarity, as an adaptive array, to living Cebidae. These apes are most frequently pictured as small to medium-sized cebid-like quadrupeds occupying arboreal1-6, fruit-and leaf ... Full text Cite

The evolution of molar occlusion in the Cercopithecidae and early Catarrhines.

Journal Article American journal of physical anthropology · March 1977 Those Eocene prosimians which are possible catarrhine ancestors have four blade-like crests on each lower molar. Each crest shears in sequence across two upper molar crests. Occluding crests are concavely curved to hold the foods being sheared. Each of two ... Full text Cite

Cranial morphology and adaptations of Palaechthon nacimienti and other paromomyidae (Plesiadapoidea, ? primates), with a description of a new genus and species

Journal Article Journal of Human Evolution · January 1, 1977 The Middle Paleocene paromomyid Palaechthon nacimienti has the most primitive cranial anatomy known for any plesiadapoid. In relative size and functional morphology, its molars resemble those of primates and tree shrews known to feed largely on insects. It ... Full text Cite

An analysis of chewed food particle size and its relationship to molar structure in the primatesCheirogaleus medius andGalago senegalensis and the insectivoranTupaia glis

Journal Article American Journal of Physical Anthropology · January 1, 1977 The chewed food particle size and shearing capacity of the lower molars of two primate species, the fat‐tailed dwarf lemur,Cheirogaleus medius and the bushbabyGalago senegalensis, and an insectivoran, the tree shrew,Tupaia glis, were compared. Differences ... Full text Cite

POST-OLIGOCENE EVOLUTION OF CATARRHINE DIETS

Conference AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY · January 1, 1977 Link to item Cite

Evolution of molar function in catarrhines

Journal Article American Journal of Physical Anthropology · 1976 Cite

Prosimian Biology, a review

Journal Article American Scientist · 1976 Cite

Maxillary premolar reduction in the golden monkey

Journal Article Journal of Dental Research · December 1975 Cite

The functional adaptations of primate molar teeth.

Journal Article American journal of physical anthropology · September 1975 Measurements were taken on the upper and lower molars of 37 species of primates and one tupaiid to assess the relative importance of shearing, crushing and grinding features. Significant correlations were found between pairs of allometrically standardized ... Full text Cite

Letter: Allometry and early hominids.

Journal Article Science (New York, N.Y.) · July 1975 Cite

SKULL OF PALAECHTHON AND COMMENTS ON ECOLOGICAL ADAPTATIONS OF PLESIADAPOIDEA

Journal Article AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY · January 1, 1975 Link to item Cite

ALLOMETRY AND EARLY HOMINIDS - COMMENT

Journal Article SCIENCE · January 1, 1975 Link to item Cite

Body size, molar structure and diet in primates

Journal Article American Journal of Physical Anthropology · December 1974 Cite

Skull of Palaechthon nacimienti

Journal Article Nature · December 1, 1974 SPECIES in or near the ancestry of living primates first appear in the late Cretaceous and early Palaeocene of North America. Subsequent adaptive radiation of the Purgatorius-like ancestral stock produced the plesiadapoid families (Plesiadapidae, Carpolest ... Full text Cite

Jaw movement and tooth use in recent and fossil primates.

Journal Article American journal of physical anthropology · March 1974 Full text Cite

Letter: Humerus of robust Australopithecus.

Journal Article Science (New York, N.Y.) · October 1973 Full text Cite

Mastication, Molar Tooth Structure and Diet in Primates

Journal Article Dissertation Abstracts International · 1973 Cite