part of part of develops from develops from lower jaw region endochondral bone Meckel's cartilage skeleton of lower jaw bone of lower jaw retroarticular 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 ZFA:0000422 The retroarticular is a cartilage bone that forms at the posteroventral tip of Meckel's cartilage where the interoperculomandibular ligament attaches (5.1 mm NL). In the adult it is basically triangular in shape. The retroarticular is ligamentously connected to the interopercle and preopercle posteriorly and abuts the ventral shelf of the dentary anteriorly. UBERON:2000422