part of part of pelvic region element pelvic girdle skeleton cartilage element puboischiadic bar A transverse flattened or cylindrical plate in the posterior body wall opposite the anterior ends of the pelvic fins, in front of the vent and at the posterior end of the body cavity, that supports a few anterior pelvic radials and a basal cartilage, the basipterygium. from Leonard J. V. Compagno. 2001. Sharks of the World: An Annotated and Illustrated Catalogue of Shark Species Known to Date. Volume 2. Potentially homologous to the pelvic girdle. UBERON:4200135 T Alexander Dececchi