Tylomelania mahalonensis is a species of freshwater snail with an operculum, an aquatic gastropod mollusk in the family Pachychilidae.
The specific name mahalonensis is taken from that of Lake Mahalona, where this species of snail lives.
Distribution This species occurs in the Malili Lakes, 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. . Its type locality is Lake Mahalona.
Ecology Tylomelania mahalonensis is a lacustrine species.
The females of Tylomelania mahalonensis usually have 1-11 embryos in their brood pouch. Newly hatched snails of Tylomelania mahalonensis have a shell height of 4.0-10.2 mm.
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