Subulinidae, P. Fischer & Crosse, 1877

Jindal, Rajinder & Wats, Meenu, 2021, Systematic descriptions and seasonal variations of mollusc in Chandigarh (U. T., India) and its surrounding freshwater bodies, International Journal of Fisheries and Aquatic Studies 9 (3), pp. 165-173 : 170

Family: Subulinidae

Subulinidae is a family of most diverse terrestrial gastropods.

The shells of this family are elongate, turreted to cylindrical and their size varying from small to medium. They are uniformly coloured, whorls are smooth or with indistinct sculpture on apical whorls and in sutural region on lower whorls.

Opeas gracile (Hutton, 1834)

Taxonomic description- Shell small to large, thin walled, turreted, uniformly dull pale brown colored; spire gradually tapering; apex rounded; body whorl conspicuous, equal to two preceding whorls; number of whorls 10; aperture semi-ovate, slightly narrowed above, longer than broad; columellar lip slightly reflected, almost straight, outer lip thin, sharp edged.

Zootecus insularis (Ehrenberg, 1831)

Taxonomic description- Shell pupiform, sub cylindrical, thin, corneous white; number of whorls 7, moderately convex; body whorl slightly bigger, little above the aperture; aperture semi-oval, pointed above; columellar margin strongly reflected, thickened, partially covering umbilicus; umbilicus narrow, sculptured with fine closely set sub ventral striae.