Direct development of the catfish pectoral fin: An alternative pectoral fin pattern of teleosts.
Fedor N ShkilDaria KapitanovaVasily BorisovNikolay VeretennikovNatacha RouxVincent LaudetPublished in: Developmental dynamics : an official publication of the American Association of Anatomists (2022)
This catfish displays a direct pectoral fin developmental trajectory differing from the stereotyped teleost pattern. In the absence of the larval endoskeletal disk and TH control, the catfish's proximal radials arise in a manner somewhat similar to the metapterygial radials in basal actinopterygians and humerus in sarcopterygians. Thus, the catfish fin pattern seems homoplastic, arising by convergence with, or reversion to the ancestral developmental mechanisms.
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