Hypselostoma sichang (Panha & J. B. Burch, 2002 ), 2025

Hypselostoma sichang (Panha & J. B. Burch, 2002) comb. nov.

Figs 186 L View Figure 186 , 209 View Figure 209 , 210 View Figure 210 , 223 View Figure 223

Anauchen sichang Panha & Burch, 2002 e: 21 , fig. 2.

Gyliotrachela sichang View in CoL — Panha and Burch 2008: 80, fig. 69; Dumrongrojwattana and Wongkamhaeng 2024: 324, fig. 8.

Type material examined.

Thailand • holotype; 2001; S. Panha leg.; CUMZ 44001 View Materials • 2 paratypes; from the type locality; 2001; S. Panha leg.; SMF 331463 About SMF .

Additional material examined.

Thailand • 10 shells; Sa Kaeo Province, Wang Sombun district, vicinity of Tham Khoa Phlapphueng Thong ; 13°26.873'N, 102°13.071'E; 06 Mar. 2023; A. Hunyadi leg.; coll. HA GoogleMaps .

Type locality.

“ Sichang island, Si Racha, Chon Buri Province, 13°20′05″N, 100°55′24″E, 70 meters elevation ” ( Thailand).

Differential diagnosis.

This species is similar to H. hungerfordianum from which it can be separated by the much stronger and lower peripheral keel, very rough, sandpaper-like shell surface sculpture as well as the narrower umbilicus. See also under H. vesovici sp. nov.

Distribution.

This species is, apart from the type locality, known from one more sampling site in Sa Kaeo Province.