LAGOCHEILUS KLOBUKOWSKII (MORLET, 1885): A NEW SPECIES OF THE OPERCULATE TERRESTRIAL SNAIL FOR THE VIETNAMESE FAUNA (GASTROPODA: CYCLOPHORIDAE)

Abstract

Although terrestrial snails have such diversity and certain potential applications, they are still poorly studied in Vietnam, especially in limestone regions. The present study represents the first record of operculate terrestrial snail Lagocheilus klobukowskii (Morlet, 1885) in Vietnam. The species was found and collected from the isolated limestone hills of Son La, Dong Nai and Kien Giang Provinces. The specimens were identified using morphologic characters including shell shape, exterior sculpturing, aperture, and shape of operculate. This new discovery contributes to brings the number of species of genus Lagocheilus in Vietnam to nine species. L. klobukowskii is characterized by medium size, conical, high spire; shell sculpting of various colors and patterns, often appearing a dark brown band at the periphery of body whorl; thick, single and not extended peristome; operculum calcareous, disc-shaped, slightly thick and with multiple lamellate outside; umbilicus open.