Notes on branchiosaurs

Abstract

A small amphibian from the late Pennsylvanian of Pennsylvania exhibits typical branchiosaur features and is described as Branchiosaurus darrahi. A study of the branchiosaurs demonstrates that the order Phyllospondyli is non-existent; the forms assigned to it are simply small and generally immature labyrinthodonts belonging to the rhachitomous and embolomerous divisions of that group.