Origin of the vertebrate pectoral girdle and pectoral fins – overturned

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…

palaeontology Archivi - Scientificult

Fish fin - Wikipedia

davidpeters1954, The Pterosaur Heresies

Diversity, Free Full-Text

Elasmosaurus - Wikipedia

Pectoral and Pelvic Girdles – Morphology of the Vertebrate Skeleton

davidpeters1954, The Pterosaur Heresies

Fish fin - Wikipedia

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

Mechanics of Pectoral Fin Swimming in Fishes - ScienceDirect

davidpeters1954, The Pterosaur Heresies

Ventral view of the cephalic region and pectoral girdle of Liobagrus

Pectoral Girdle - an overview