part of part of postcranial axial skeleton endochondral bone transverse radial UBERON:2001697 Endochondral bone, which may be ossified or not in adults, located immediately anteriorly to the pterygiophore series of the anal fin. The structure is usually cylindrical, and its plane of symmetry is transverse to that of pterygiophores and fin rays. This class was sourced from an external ontology (teleost_anatomy). Its definitions, naming conventions and relationships may need to be checked for compatibility with uberon Recorded in some Cetopsidae, Clariidae and Austroglanididae (Siluriformes) (De Pinna et al., 2007).