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…
Fish fin - Wikipedia
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Fish fin - Wikipedia
PDF) Fossil evidence for a pharyngeal origin of the vertebrate pectoral girdle
GEOL431 - Vertebrate Paleobiology
davidpeters1954, The Pterosaur Heresies
Evolution of pectoral innervation.(a) Cladogram of living jawed
davidpeters1954, The Pterosaur Heresies
PDF) Fossil evidence for a pharyngeal origin of the vertebrate pectoral girdle
