A new genus of Diplommatinidae from the Andaman Islands (Gastropoda: Caenogastropoda: Cyclophoroidea)

摘要

Examination of the syntypes ofPupa(Pupisoma)constrictusGodwin-Austen, 1895 revealed that this species does not belong to the eupulmonate Pupilloidea, but to the caenogastropod Diplommatinidae. Based on conchological characters it could not be placed to any of the existing diplommatinid genera, therefore a new genus,Moderatan. gen. is erected, which is characterised by a conical shell, a discontinuous aperture and most importantly, a conspicuous constriction half a whorl behind the aperture.Pupisoma bilamellatumBenthem Jutting, 1958 andP. unilamellatumBenthem Jutting, 1958 are moved to the assimineid genusAcmellaW. T. Blanford, 1869.