Hypselostoma loei Panha & Prateespasen 2005

Hypselostoma loei Panha & Prateespasen, 2005 Figs 186 H, 203, 223 Hypselostoma loei Panha & Prateespasen, 2005: 99, fig. 2. Hypselostoma loei — Panha and Burch 2008: 94–95, fig. 81; Dumrongrojwattana and Wongkamhaeng 2024: 324, fig. 8. Type material examined. Thailand • 1 paratype; from the type locality; CUMZ ver. 025. Additional material examined. Thailand-Central • 3 shells; Phitsanulok Province, Noen Maprang district, Chomphu, Tham Phra Wang Daeng; 16°40.651'N, 100°41.287'E; 150 m a. s. l.; 02 Mar. 2023; A. Hunyadi & J. U. Otani leg.; coll. HA • Thailand- Northeast • 54 shells; Loei Province, Nong Hin district, 20.3 km southwest from the centre of Nong Hin towards Pha Wai, left side of the road no. 3029; 17°2.471'N, 101°43.655'E; 705 m a. s. l.; 28 Feb. 2023; A. Hunyadi & J. U. Otani leg.; coll. HA • 46 shells; Loei Province, Mueang Loei district, rock wall above Wat Tham Piya Thammarangsi; 17°27.896'N, 101°51.578'E; 27 Feb. 2023; A. Hunyadi & J. U. Otani leg.; coll. HA • 9 shells; Loei Province, 9.2 km NW Loei Buddhist temple, up and N of main cave entrance, among leaves; 17°35'N, 101°44'E; 28 Apr. 1988; K. Auffenberg leg.; locality code KA-0685, UF 345859 • 1 shell; Loei Province, 1 km E Ban Huai Muang; 17.474°N, 101.889°E; 375 m a. s. l.; 21. May 1987; F. G. Thompson leg.; locality code FGT-4274, UF 527260 • 11 shells; Nong Bua Lamphu Province, Na Klang district, Wat Phuttha Banphot - Tham Pha Choo; 17°18.931'N, 102°7.042'E; 27 Feb. 2023; A. Hunyadi & J. U. Otani leg.; coll. HA • 13 shells; Khon Kaen Province, Phu Pha Man district, rocks above Wat Phu Hua Chang; 16°39.170'N, 101°48.094'E; 345 m a. s. l.; 01 Mar. 2023; A. Hunyadi & J. U. Otani leg.; coll. HA • 10 shells; Khon Kaen Province, Chum Phae district, Na Nong Tum, Kled Kaew cave; 16°49.021'N, 101°57.382'E; 580 m a. s. l.; 01 Mar. 2023; A. Hunyadi & J. U. Otani leg.; coll. HA Type locality. “ Limestone hills in Loei Province, 16°45'47"N. 101°59'8"E, 110 meters elevation … Thailand … ”. Differential diagnosis. This species is similar to H. hungerfordianum but the latter has separate angular and parietal lamellae and more numerous barriers. Distribution. Known from Loei, Phitsanulok, Khon Kaen and Nong Bua Lamphu provinces in Thailand. Remarks. The striking similarity of this species with H. hungerfordianum suggests that Gyliotrachela is a junior synonym of Hypselostoma.