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…

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This strange little palaeoniscid': a new early actinopterygian genus, and commentary on pectoral fin conditions and function, Earth and Environmental Science Transactions of The Royal Society of Edinburgh

PDF) Fossil evidence for a pharyngeal origin of the vertebrate pectoral girdle

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This strange little palaeoniscid': a new early actinopterygian genus, and commentary on pectoral fin conditions and function, Earth and Environmental Science Transactions of The Royal Society of Edinburgh

Right pectoral girdles of the extant lobe-finned fish Neoceratodus (A