Tylomelania scalariopsis is a species of freshwater snail with an operculum, an aquatic gastropod mollusk in the family Pachychilidae.
Distribution This species occurs in Lake Poso drainage, Sulawesi, Indonesia.von Rintelen T. & Glaubrecht M. (2005). "Anatomy of an adaptive radiation: a unique reproductive strategy in the endemic freshwater gastropod Tylomelania (Cerithioidea: Pachychilidae) on Sulawesi, Indonesia and its biogeographical implications." Biological Journal of the Linnean Society 85: 513–542. . The type locality is the Poso River, 400 m against the river current.
Description The shell has 11-12 whorls.
The width of the shell is 12 mm. The height of the shell is 34 mm. The width of the aperture is 6.5 mm. The height of the aperture is 10 mm.
There are 6 concentric lines on the operculum.
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