New and little-known species of Clostophis Benson, 1860 from Southeast Asia (Gastropoda: Eupulmonata: Hypselostomatidae)

The present paper describes six new species as follows: Clostophis bactrianus, new species (Peninsular Malaysia), Clostophis thinbowguensis, new species (Myanmar), Clostophis obliquus, new species (China: Guangxi), Clostophis yoga, new species (Vietnam), Clostophis candidus, new species (Vietnam) and Clostophis charybdis, new species (Vietnam). Additional information on shell morphology and distribution is presented for Clostophis laidlawi (Collinge, 1902), Clostophis neglectus (van Benthem Jutting, 1961) and Clostophis sankeyi Benson, 1860. Furthermore, Hypselostoma lacrima Páll-Gergely & Hunyadi, 2015 and H. socialis Páll-Gergely & Hunyadi, 2015 are transferred to Clostophis