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Extreme convergence in the body plans of an early suchian (Archosauria) and ornithomimid dinosaurs (Theropoda).
Proc Biol Sci. 2006 May 07; 273(1590):1045-8.PB

Abstract

Living archosaurs comprise birds (dinosaurs) and crocodylians (suchians). The morphological diversity of birds and stem group dinosaurs is tremendous and well-documented. Suchia, the archosaurian group including crocodylians, is generally considered more conservative. Here, we report a new Late Triassic suchian archosaur with unusual, highly specialized features that are convergent with ornithomimid dinosaurs. Several derived features of the skull and postcranial skeleton are identical to conditions in ornithomimids. Such cases of extreme convergence in multiple regions of the skeleton in two distantly related vertebrate taxa are rare. This suggests that these archosaurs show iterative patterns of morphological evolution. It also suggests that this group of suchians occupied the adaptive zone that was occupied by ornithomimosaurs later in the Mesozoic.

Authors+Show Affiliations

Division of Paleontology, American Museum of Natural History, Central Park West at 79th Street, New York City, NY 10024, USA. nesbitt@ldeo.columbia.eduNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

16600879

Citation

Nesbitt, Sterling J., and Mark A. Norell. "Extreme Convergence in the Body Plans of an Early Suchian (Archosauria) and Ornithomimid Dinosaurs (Theropoda)." Proceedings. Biological Sciences, vol. 273, no. 1590, 2006, pp. 1045-8.
Nesbitt SJ, Norell MA. Extreme convergence in the body plans of an early suchian (Archosauria) and ornithomimid dinosaurs (Theropoda). Proc Biol Sci. 2006;273(1590):1045-8.
Nesbitt, S. J., & Norell, M. A. (2006). Extreme convergence in the body plans of an early suchian (Archosauria) and ornithomimid dinosaurs (Theropoda). Proceedings. Biological Sciences, 273(1590), 1045-8.
Nesbitt SJ, Norell MA. Extreme Convergence in the Body Plans of an Early Suchian (Archosauria) and Ornithomimid Dinosaurs (Theropoda). Proc Biol Sci. 2006 May 7;273(1590):1045-8. PubMed PMID: 16600879.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Extreme convergence in the body plans of an early suchian (Archosauria) and ornithomimid dinosaurs (Theropoda). AU - Nesbitt,Sterling J, AU - Norell,Mark A, PY - 2006/4/8/pubmed PY - 2006/8/8/medline PY - 2006/4/8/entrez SP - 1045 EP - 8 JF - Proceedings. Biological sciences JO - Proc Biol Sci VL - 273 IS - 1590 N2 - Living archosaurs comprise birds (dinosaurs) and crocodylians (suchians). The morphological diversity of birds and stem group dinosaurs is tremendous and well-documented. Suchia, the archosaurian group including crocodylians, is generally considered more conservative. Here, we report a new Late Triassic suchian archosaur with unusual, highly specialized features that are convergent with ornithomimid dinosaurs. Several derived features of the skull and postcranial skeleton are identical to conditions in ornithomimids. Such cases of extreme convergence in multiple regions of the skeleton in two distantly related vertebrate taxa are rare. This suggests that these archosaurs show iterative patterns of morphological evolution. It also suggests that this group of suchians occupied the adaptive zone that was occupied by ornithomimosaurs later in the Mesozoic. SN - 0962-8452 UR - https://www.unboundmedicine.com/medline/citation/16600879/Extreme_convergence_in_the_body_plans_of_an_early_suchian__Archosauria__and_ornithomimid_dinosaurs__Theropoda__ L2 - https://royalsocietypublishing.org/doi/10.1098/rspb.2005.3426?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -