Simplified phylogeny with hypothetical steps in pectoral girdle

The Neck: Development and Evolution

June, 2017, The Pterosaur Heresies

On the serial homology of the pectoral and pelvic girdles of tetrapods - Sears - 2015 - Evolution - Wiley Online Library

Xing XU, Professor, PhD, Chinese Academy of Sciences, Beijing, CAS, Institute of Vertebrate Paleontology and Paleoanthropology

Photograph and line drawing of the holotype of Avimaia schweitzerae

Higher‐order phylogeny of modern birds (Theropoda, Aves

Ibiricu_003162016

a Wing and pectoral girdle bones of a pigeon (Columba sp.), with the

Higher-order phylogeny of modern birds (Theropoda, Aves

The Pterosaur Heresies, There's something very wrong with our pterosaurs.