Parazaptyx, PILSBRY, 1905

Motochin, Risho, Wang, Min & Ueshima, Rei, 2017, Molecular phylogeny, frequent parallel evolution and new system of Japanese clausiliid land snails (Gastropoda: Stylommatophora), Zoological Journal of the Linnean Society 181, pp. 795-845 : 835

SUBGENUS PARAZAPTYX PILSBRY, 1905

Type species: Clausilia thaumatopoma Pilsbry, 1905

Diagnosis: Shell small, slender. Inferior lamella receded, but developed inside the aperture, obliquely ascending. Sutural plica absent. Lunella oblique, separated from the upper palatal plica. Principal plica developed, long. Lower palatal plica absent. Clausilium wide, with a short transverse plate on the outer side. Reproduction ovoviviparous. Distribution: endemic to Kerama Islands in the central Ryukyus.

Morphology: Apex pointed. Plicae and clausilium located laterally. Superior lamella developed. Inferior lamella receded. Upper palatal plica present. Middle palatal plica(e) absent. Diverticulum of bursa copulatrix developed. See also Diagnosis.