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…

Storming the Beaches: Early Land Vertebrates

davidpeters1954, The Pterosaur Heresies

davidpeters1954, The Pterosaur Heresies

The origin and early phylogenetic history of jawed vertebrates. - Abstract - Europe PMC

Image from page 110 of A laboratory manual for comparativ…

Skeleton - Limbs, Muscles, Joints

Origin and Comparative Anatomy of the Pectoral Limb

Comparison of Pectoral Girdles in Various Vertebrates

Frontiers Problems in Fish-to-Tetrapod Transition: Genetic Expeditions Into Old Specimens

Comparative anatomy of vertebrates

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