共找到 3 筆符合的資料
inferior well-developed, both poorly-developed at posterior tip. Neck dorso-ventrally constricted.....more
raised, wall-like. Crista superior ridge-like and crista inferior poorly-developed, both absent.....more
inferior poorly-developed, both absent at posterior tip. Neck dorso-ventrally constricted. Rostrum.....more
