15-P034 Expression of a Coe gene in the developing nervous system of the annelid Platynereis dumerilii

Abstract

ancestral molluscs probably possessed a single shell plate as seen extant limpet. In addition, bivalves also acquired a novel structure, adducter muscle to close the separated shell plate. Because the two novel structures, the separated shell plate and the adducter muscle appear early embryonic stage, their evolution should