共找到 3 筆符合的資料
at posterior. Colliculum low. Collum wall-like. Crista superior and crista inferior ridge-like, absent.....more
ridge-like, absent at posterior. Neck slightly constricted. Rostrum very extended, large. Excisura.....more
and crista inferior ridge-like, poorly-developed at post erior. Neck slightly constricted. Rostrum.....more
