Rivomarginella morrisoni
Rivomarginella morrisoni is a species of freshwater snail, gastropod mollusk in the family Marginellidae, the margin snails. "Rivomarginella morrisoni" is the type species of the genus "Rivomarginella". Distribution. It is native to central Thailand: Mae Klong River, Prachin Buri River, Nan River, Klong Bang O, Klong Ban Yikkan, Klong Prapa, Klong Rapipat. The type locality is Prachin Buri River, Kabin Buri District, Thailand. Description. The height of the shell is 5.4 - 11.3 mm. Ecology. "Rivomarginella morrisoni" lives in rivers, lakes, and canals.