Display Settings:

Format

Send to:

Choose Destination
See comment in PubMed Commons below
Proc Biol Sci. 2010 Feb 7;277(1680):383-9. doi: 10.1098/rspb.2009.1603. Epub 2009 Oct 14.

Evidence for modular evolution in a long-tailed pterosaur with a pterodactyloid skull.

Author information

  • 1Institute of Geology, Chinese Academy of Geological Sciences, , Beijing 100037, People's Republic of China. lujc2008@126.com

Abstract

The fossil record is a unique source of evidence for important evolutionary phenomena such as transitions between major clades. Frustratingly, relevant fossils are still comparatively rare, most transitions have yet to be documented in detail and the mechanisms that underpin such events, typified by rapid large scale changes and for which microevolutionary processes seem insufficient, are still unclear. A new pterosaur (Mesozoic flying reptile) from the Middle Jurassic of China, Darwinopterus modularis gen. et sp. nov., provides the first insights into a prominent, but poorly understood transition between basal, predominantly long-tailed pterosaurs and the more derived, exclusively short-tailed pterodactyloids. Darwinopterus exhibits a remarkable 'modular' combination of characters: the skull and neck are typically pterodactyloid, exhibiting numerous derived character states, while the remainder of the skeleton is almost completely plesiomorphic and identical to that of basal pterosaurs. This pattern supports the idea that modules, tightly integrated complexes of characters with discrete, semi-independent and temporally persistent histories, were the principal focus of natural selection and played a leading role in evolutionary transitions.

PMID:
19828548
[PubMed - indexed for MEDLINE]
PMCID:
PMC2842655
Free PMC Article
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for HighWire Icon for PubMed Central
    Loading ...
    Write to the Help Desk