Description of the second Laotia Saurin, 1953; a genus new to the fauna of Vietnam (Gastropoda: Cyclophoroidea)

This paper reports the second species of the genus Laotia Saurin, 1953. L. pahiensis Saurin, 1953 was described from Laos, Pa Hia, whereas the new species, L. christahemmenae n. sp. was collected in Ha Noi Province, Vietnam, approximately 350 km NE of the type localty of the Laotian species. The new species is approximately twice larger than its congener, and has a ribbed shell with a smooth area behind its aperture. In contrast, L. pahiensis is ribbed until the peristome or the ribbing stops very close to the peristome. It is uncertain if Laotia should be placed in Diplommatinidae or in Alycaeidae.