Drimolen cranium DNH 155 documents microevolution in an early hominin species.

Journal Article (Journal Article)

Paranthropus robustus is a small-brained extinct hominin from South Africa characterized by derived, robust craniodental morphology. The most complete known skull of this species is DNH 7 from Drimolen Main Quarry, which differs from P. robustus specimens recovered elsewhere in ways attributed to sexual dimorphism. Here, we describe a new fossil specimen from Drimolen Main Quarry, dated from approximately 2.04-1.95 million years ago, that challenges this view. DNH 155 is a well-preserved adult male cranium that shares with DNH 7 a suite of primitive and derived features unlike those seen in adult P. robustus specimens from other chronologically younger deposits. This refutes existing hypotheses linking sexual dimorphism, ontogeny and social behaviour within this taxon, and clarifies hypotheses concerning hominin phylogeny. We document small-scale morphological changes in P. robustus associated with ecological change within a short time frame and restricted geography. This represents the most highly resolved evidence yet of microevolutionary change within an early hominin species.

Full Text

Duke Authors

Cited Authors

  • Martin, JM; Leece, AB; Neubauer, S; Baker, SE; Mongle, CS; Boschian, G; Schwartz, GT; Smith, AL; Ledogar, JA; Strait, DS; Herries, AIR

Published Date

  • January 2021

Published In

Volume / Issue

  • 5 / 1

Start / End Page

  • 38 - 45

PubMed ID

  • 33168991

Electronic International Standard Serial Number (EISSN)

  • 2397-334X

International Standard Serial Number (ISSN)

  • 2397-334X

Digital Object Identifier (DOI)

  • 10.1038/s41559-020-01319-6

Language

  • eng