part of part of develops from develops from endochondral bone skeleton of lower jaw bone of lower jaw mentomeckelian dentale UBERON:0011770 AAO:0000301 Paired, cylindrical, and small bones of endochondral origin that lie anteromedial to the anterior end of Meckel's cartilage. The precursors of the mentomeckelian bones are the larval infrarostral cartilages. pars mentalis infrarostral cartilage