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…

Pectoral girdle and fin of Squalus megalops (MZUSP 110973, female

The pectoral fin of Tiktaalik roseae and the origin of the tetrapod limb

Lateral view of the left pectoral girdle and fin muscles of the shark

Fish fin - Wikipedia

Fossils, genes and the evolution of animal limbs

Origin and Comparative Anatomy of the Pectoral Limb

davidpeters1954, The Pterosaur Heresies

Chondrenchelys problematica (Traquair, 1888) redescribed: a Lower Carboniferous, eel-like holocephalan from Scotland, Earth and Environmental Science Transactions of The Royal Society of Edinburgh

Comparative anatomy of pectoral limb endoskeleton and humerus of

Evolution of the tetrapod pelvis and the known mechanisms of vertebrate