A Well-Preserved Archaeopteryx Specimen with Theropod Features-Reference-Cited by-同舟云学术

A Well-Preserved Archaeopteryx Specimen with Theropod Features

Published:2005-12-02 Issue:5753 Volume:310 Page:1483-1486
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Mayr Gerald¹²,Pohl Burkhard¹²,Peters D. Stefan¹²

Affiliation:

1. Forschungsinstitut Senckenberg, Division of Ornithology, Senckenberganlage 25, D-60325 Frankfurt am Main, Germany.

2. Wyoming Dinosaur Center, 110 Carter Ranch Road, Post Office Box 912, Thermopolis, WY 82443, USA.

Abstract

A nearly complete skeleton of Archaeopteryx with excellent bone preservation shows that the osteology of the urvogel is similar to that of nonavian theropod dinosaurs. The new specimen confirms the presence of a hyperextendible second toe as in dromaeosaurs and troodontids. Archaeopteryx had a plesiomorphic tetraradiate palatine bone and no fully reversed first toe. These observations provide further evidence for the theropod ancestry of birds. In addition, the presence of a hyperextendible second toe blurs the distinction of archaeopterygids from basal deinonychosaurs (troodontids and dromaeosaurs) and challenges the monophyly of Aves.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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5. The first 85 million years of avian evolution

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