Skip to main content

Disentangling the Collema-Leptogium complex through a molecular phylogenetic study of the Collemataceae (Peltigerales, lichen-forming Ascomycota).

Publication ,  Journal Article
Otálora, MAG; Aragón, G; Molina, MC; Martínez, I; Lutzoni, F
Published in: Mycologia
March 2010

Family Collemataceae (Peltigerales, Ascomycota) includes species of cyanolichens with foliose to fruticose or crustose thalli, with simple or septate ascospores. The current classification divides this family into two groups on the basis of ascospore types. The objective of this study was to evaluate the phylogenetic relationships within this family. Combined DNA sequence data from the nuclear large subunit and mitochondrial small subunit ribosomal RNA genes were used to evaluate monophyly of the family and the relationships between the largest genera of this family. The results revealed that this family is not monophyletic. Genera Staurolemma and Physma, currently classified within the Collemataceae, were found nested within the Pannariaceae. The second result of this study confirms that the genera Collema and Leptogium, both part of the Collemataceae s. str., are not monophyletic and that the presence of a thallus cortex is not a synapomorphy for Leptogium. The main taxonomic conclusion is that families Collemataceae and Pannariaceae were recircumscribed in light of molecular findings with the latter family now including Staurolemma and Physma. Genera Collema and Leptogium form a single mixed monophyletic group. Inferred ancestral character states within the Collema-Leptogium complex revealed that the ancestor of this family had a thallus without cortex and that a cortex evolved at least twice relatively early in the evolution of the Collemataceae s. str. These independent gains of a thallus cortex seems to be associated with a transition from colonizing bare rocks and soils in semi-arid and exposed habitats to epiphytism in shady humid forests.

Duke Scholars

Altmetric Attention Stats
Dimensions Citation Stats

Published In

Mycologia

DOI

EISSN

1557-2536

ISSN

0027-5514

Publication Date

March 2010

Volume

102

Issue

2

Start / End Page

279 / 290

Related Subject Headings

  • Sequence Alignment
  • RNA, Ribosomal
  • Polymerase Chain Reaction
  • Phylogeny
  • Mycology & Parasitology
  • Lichens
  • DNA, Mitochondrial
  • DNA, Fungal
  • Base Sequence
  • Ascomycota
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Otálora, M. A. G., Aragón, G., Molina, M. C., Martínez, I., & Lutzoni, F. (2010). Disentangling the Collema-Leptogium complex through a molecular phylogenetic study of the Collemataceae (Peltigerales, lichen-forming Ascomycota). Mycologia, 102(2), 279–290. https://doi.org/10.3852/09-114
Otálora, Mónica A. G., Gregorio Aragón, M Carmen Molina, Isabel Martínez, and François Lutzoni. “Disentangling the Collema-Leptogium complex through a molecular phylogenetic study of the Collemataceae (Peltigerales, lichen-forming Ascomycota).Mycologia 102, no. 2 (March 2010): 279–90. https://doi.org/10.3852/09-114.
Otálora, Mónica A. G., et al. “Disentangling the Collema-Leptogium complex through a molecular phylogenetic study of the Collemataceae (Peltigerales, lichen-forming Ascomycota).Mycologia, vol. 102, no. 2, Mar. 2010, pp. 279–90. Epmc, doi:10.3852/09-114.
Otálora MAG, Aragón G, Molina MC, Martínez I, Lutzoni F. Disentangling the Collema-Leptogium complex through a molecular phylogenetic study of the Collemataceae (Peltigerales, lichen-forming Ascomycota). Mycologia. 2010 Mar;102(2):279–290.

Published In

Mycologia

DOI

EISSN

1557-2536

ISSN

0027-5514

Publication Date

March 2010

Volume

102

Issue

2

Start / End Page

279 / 290

Related Subject Headings

  • Sequence Alignment
  • RNA, Ribosomal
  • Polymerase Chain Reaction
  • Phylogeny
  • Mycology & Parasitology
  • Lichens
  • DNA, Mitochondrial
  • DNA, Fungal
  • Base Sequence
  • Ascomycota