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| Clostophis udayaditinus Sutcharit & Panha, in Sutcharit, Thi, Chantha, Chourn, Sophea, Jeratthitikul, Pholyotha, Siriwut, Srisonchai et Panha, 2025. Journal of Conchology. 45(3); |
Abstract
Specimens of a new species of hypselostomatid microsnail, Clostophis udayaditinus Sutcharit & Panha, n. sp., were collected from the limestone hills area in Battambang Province, western Cambodia. Besides being a species new to science, this discovery represents a new country record for the genus. The new species differs from all other congeners by its concave-conical shell, with apertural dentition four in number, and hooked parietal and columellar lamellae. Living snails were found crawling on the walls in a cave, and the snails have a colourless, semitransparent soft body.
Key words. Angkor Kingdom, endemic species, limestone, pulmonates, taxonomy
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| Clostophis udayaditinus n. sp. from the type locality. A–C, paratype CUMZ 14466 of living snails crawling on wet tissue paper (three snails at different angles; all shell widths about 1.3 mm). D, light microscope image of paratype CUMZ 14467 with enlarged aperture at different angles. Abbreviations: c = columellar lamella, ip = infraparietal lamella, p = parietal lamella, pl = palatal plica. |
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| Clostophis udayaditinus n. sp. from Battambang, Cambodia. A, holotype CUMZ 14441 with enlarged aperture at different angles, and enlarged columellar lamella and palatal plica, and B, C, protoconch. D, paratype CUMZ 14446 from the type locality. Abbreviations: c = columellar lamella, ip = infraparietal lamella, p = parietal lamella, pl = palatal plica. |
Family Hypselostomatidae Zilch, 1959
Clostophis Benson, 1860
Type species. Clostophis sankeyi Benson, 1860, by monotypy.
Remarks. Until now, the genus Clostophis has been known
to be widely distributed from Peninsular Malaysia to Myanmar, mainland Indochina, and southern China (Páll-Gergely
et al. 2020; Páll-Gergely & Hunyadi 2022; MolluscaBase
Eds 2024). There are 20 species known from Cambodia,
including the new species, described here.
Clostophis udayaditinus Sutcharit & Panha, n. sp.
Diagnosis. Shell concave-conical, with long, descending
tuba and expanded peristome. Apertural dentition four:
consisting of one hooked parietal lamella, one small infraparietal lamella, one large, strong palatal plica, and one hooked
columellar lamella. Umbilicus wide.
Etymology. The species name udayaditinus is from “udayadit-”, and the suffix “-inus”, meaning possession or belonging to. This name is a memorial to King Udayadityavarman
II, who ruled the Angkor Kingdom around 1100 A.D. He
also ordered the building of the Bannan Temple (Higham
2014), which became the name of the hill—the type locality of this new species.
Chirasak Sutcharit, Sothearen Thi, Nasak Chantha, Phyroum Chourn, Chhin Sophea, Ekgachai Jeratthitikul, Arthit Pholyotha, Warut Siriwut, Ruttapon Srisonchai and Somsak Panha. 2025. First Rrecord of the Microsnail Genus Clostophis Benson, 1860 (Eupulmonata: Pupilloidea) from Cambodia, with Description of A New Species. Journal of Conchology. 45(3); DOI. doi.org/10.61733/jconch/4538 [23 February 2025]
