A median fin derived from the lateral plate mesoderm and the origin of paired fins.

ABSTRACT: The development of paired appendages was a key innovation during evolution and facilitated the aquatic to terrestrial transition of vertebrates. Largely derived from the lateral plate mesoderm (LPM), one hypothesis for the evolution of paired fins invokes derivation from unpaired median fins via a pair of lateral fin folds located between pectoral and pelvic fin territories¹. Whilst unpaired and paired fins exhibit similar structural and molecular characteristics, no definitive evidence exists for paired lateral fin folds in larvae or adults of any extant or extinct species. As unpaired fin core components are regarded as exclusively derived from paraxial mesoderm, any transition presumes both co-option of a fin developmental programme to the LPM and bilateral duplication^2<

SUBMITTER: Tzung KW 

PROVIDER: S-EPMC10266977 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature