Uroneural

Neural arch that extends along the dorso-lateral surface of the last preural centra and/or ural centra and the notochord (Arratia & Schultze, 1992). An uroneural develops as a modification of the neural arch of an ural centrum (Patterson, 1968). The series of uroneurals may include from 7 to 1 elements that are numbered from rostrad to caudad. An uroneural is a paired membrane bone.