Simplified phylogeny with hypothetical steps in pectoral girdle

Simplified cladograms showing morphological evolutionary rates of birds

Diversity, Free Full-Text

The Pectoral Girdle and Forelimb Skeleton (Chapter 7) - Skeletal

A phylogenetic blueprint for a modern whale - ScienceDirect

Full article: A redescription of Chaoyangia beishanensis (Aves) and a comprehensive phylogeny of Mesozoic birds

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

Min WANG, Professor, PhD, Chinese Academy of Sciences, Beijing, CAS, Institute of Vertebrate Paleontology and Paleoanthropology

Holotype of Archaeornithura meemannae gen. et sp. nov., STM7-145. (a)

Higher‐order phylogeny of modern birds (Theropoda, Aves

Model of phylomorphogeny of P1 elements of the Tournaisian (Mississippian) siphonodellids - ScienceDirect