Origin of the vertebrate pectoral girdle and pectoral fins

Brazeau et al 2023 report,"The past 150 years of debate has been shaped by two contentious theories: the ventrolateral fin-fold hypothesis and the archipterygium hypothesis. The latter proposes that fins and girdles evolved from an ancestral gill arch. Although studies in animal development have revived interest in this idea, it is apparently unsupported by fossil…

New analysis of ancient fish may explain how shoulder evolved

Comparison of Pectoral Girdles in Various Vertebrates

The Project Gutenberg eBook of The Vertebrate Skeleton, by Sidney H. Reynolds

Origin of the vertebrate pectoral girdle and pectoral fins – overturned

Image from page 110 of A laboratory manual for comparativ…

Full article: Pectoral fin of the Paleozoic shark, Cladoselache: new reconstruction based on a near-complete specimen

Storming the Beaches: Early Land Vertebrates

What would it take to create a 6 limbed vertebrate with the neurology to support it and how could we go about it? - Quora

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

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