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Effigia skeleton and convergent body plan

A nearly complete Upper Triassic suchian skeleton combines an edentulous skull and gracile, probably bipedal postcranium resembling later ornithomimid dinosaurs.

Represented range208.5–201.3 Ma
Regions'Siltstone member', Chinle Group, Ghost Ranch, New Mexico, USA
CladesEffigia okeeffeae · Suchia

Claim ledger

topology · medium

AMNH FR 30587 preserves a nearly complete edentulous, gracile archosaur skeleton that the published character analysis places within Suchia; resemblance to ornithomimid theropods is interpreted as convergence, not shared ancestry or identical ecology.

claim:event:effigia-convergent-body-plan

References

  1. Extreme convergence in the body plans of an early suchian (Archosauria) and ornithomimid dinosaurs (Theropoda)Nesbitt, S.J.; Norell, M.A. · 2006 · DOI 10.1098/rspb.2005.3426
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