Hypselostoma khaochakan (Panha & J. B. Burch, 2003 ), 2025

Hypselostoma khaochakan (Panha & J. B. Burch, 2003) comb. nov.

Gyliotrachela khaochakan Panha & Burch in Burch et al. 2003: 138–143, figs 4–5. View in CoL

Gyliotrachela srirachaensis Panha & Burch in Panha et al. 2004: 69–70, fig. 8. syn. nov. View in CoL

Gyliotrachela khaochakan View in CoL — Tongkerd et al. 2004: 143, fig. 2; Panha and Burch 2008: 69–70, fig. 60; Dumrongrojwattana and Wongkamhaeng 2024: 323, fig. 8.

Gyliotrachela srirachaensis View in CoL — Panha and Burch 2008: 81, fig. 70; Dumrongrojwattana and Wongkamhaeng 2024: 324, fig. 8.

Type material examined.

Thailand • 2 paratypes of H. khaochakan ; from the type locality; SMF 331445 About SMF • 1 paratype of H. khaochakan ; from the type locality; CUMZ 44041 View Materials • 1 paratype of G. srirachaensis ; from the type locality; S. Panha leg.; CUMZ ver. 44008 .

Additional material examined.

4 shells; Sa Kaeo Province, Khao Chakan district, vicinity of Wat Tham Khao Chakan; 13°39.668'N 102°05.195'E; 80 m a. s. l.; 05 Mar. 2023, A. Hunyadi & J. U. Otani leg.; coll. HA.

Type localities.

“ Chakan Mountain, east of Khaochakan Temple, Khaochakan District, Srakeaw Province, 13°39'17"N, 102°5'12"E, 70 meters elevation, Thailand ” ( H. khaochakan ); “ Sichang Island, Sriracha, Chonburi Province, 13°20'05"N, 100°55'24"E, 70 meters elevation ” ( H. srirachaensis ).

Differential diagnosis.

This species differs from H. chedi by the separated angular and parietal lamellae. See also under H. smokon .

Distribution.

This species is, apart from the type locality, known also from Sichang Island (type locality of H. srirachaensis ).

Remarks.

Gyliotrachela srirachaensis is a junior synonym of H. khaochakan since we could not find any morphological differences. The two species were not compared in the original description of G. srirachaensis .