Hypselostoma taehwani Panha & J. B. Burch 2003

Hypselostoma taehwani Panha & J. B. Burch, 2003 Hypselostoma taehwani Panha & Burch in Burch et al. 2003: 174–178, figs 16, 17. Hypselostoma taehwani — Panha and Burch 2008: 101–102, fig. 86. Type material examined. Thailand • 1 paratype; from the type locality; CUMZ 44053. Type locality. “ Central area of Tamrong Temple, Muang Petchburi District, near the main Petchkasem artery of the Asian Hwy. to southern Thailand, Petchaburi Province, 13°01'32"N, 99°55'11"E, 10 meters elevation, Thailand ”. Differential diagnosis. This species is strikingly similar to H. sculpturatum sp. nov. They can be separated by the following characters: i) initial teleoconch whorls and the penultimate whorl are more angled in H. sculpturatum sp. nov.; ii) umbilicus is wider and has a wider, deeper, and longer umbilical groove; iii) basal plica is in H. taehwani situated closer to the columellar lamella but always closer to the lower palatal plica in H. sculpturatum sp. nov. Furthermore, the protoconch is spirally striated in H. taehwani but pitted in H. sculpturatum sp. nov. Hypselostoma depressum has a wider umbilicus, much less detached last whorl near the aperture as well as the narrower spire. See also under H. burchi. Distribution. This species is known only from the type locality.