Display Settings:

Format

Send to:

Choose Destination
See comment in PubMed Commons below
Int J Dev Biol. 2003;47(7-8):517-22.

Morphological and developmental macroevolution: a paleontological perspective.

Author information

  • 1Center for Integrative Genomics and Department of Integrative Biology, University of California, Berkeley, California 94720, USA. jwvsossi@socrates.berkeley.edu

Abstract

Evidence of the morphological evolution of metazoans has been preserved, in varying degrees of completeness, in the fossil record of the last 600 million years. Although extinction has been incessant at lower taxonomic levels, genomic comparisons among surviving members of higher taxa suggest that much of the developmental systems that pattern their bodyplans has been conserved from early in their history. Comparisons between the origin of morphological disparity in the record and patterns of genomic disparity among living taxa promise to be interesting. For example, Hox cluster composition varies among major taxa, and the fossil record suggests that many of the changes in Hox clusters may have been associated with late Neoproterozoic evolution among minute benthic vermiform clades, from which crown bilaterian phyla arose just before or during the Cambrian explosion. Study of genomic differences among crown classes and orders whosetiming and mode of origin can be inferred from morphological data inthefossil record should throw further light on the timing and mode of origin of genomic disparities.

PMID:
14756327
[PubMed - indexed for MEDLINE]
Free full text
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for The International Journal of Developmental Biology
    Loading ...
    Write to the Help Desk