Hypselostoma srakeoense

Hypselostoma srakeoense (Panha & J. B. Burch, 2004) Figs 186 M, 211, 223 Anauchen srakeoensis Panha & Burch in Panha et al. 2004: 62–63, fig. 4. Anauchen srakeoensis — Panha and Burch 2008: 52–53, fig. 48; Dumrongrojwattana and Wongkamhaeng 2024: 323, fig. 7. Hypselostoma srakeoensis — Sutcharit et al. 2023: 1291–1293, fig. 2. Type material examined. Thailand • 1 paratype; from the type locality; S. Panha leg.; SMF 331473. Additional material examined. Thailand • 1 shell; Srakeo Province, Khaochakan District, Wat Khao Chakan; 22 June 2014; P. Dumrongrojwattana leg.; ex. coll. Maassen; coll. PGB. Type locality. “ Plubpluengtong limestone hills, Srakeo Province, 13°48'02"N, 102°12'49"E, 110 meters elevation ” (Thailand). Differential diagnosis. This species is superficially similar to several congeners with strongly enlarged last whorl which is also sharply descending. The two most similar species are H. torticollis and H. fungus sp. nov. However, H. torticollis has separated lamellae on the parietal side and it is also less depressed with clearly narrower umbilicus. Hypselostoma fungus sp. nov. has more rounded last whorl, wider umbilicus, more apertural barriers and is spirally striated. See also under H. pendulum. Distribution. This species is known from four sampling sites, two in Sa Kaeo province (Thailand) and two in Banteay Meanchey province (Cambodia) (Sutcharit et al. 2023).