Hypselostoma pattalungense Panha & J. B. Burch 2004

Hypselostoma pattalungense Panha & J. B. Burch, 2004 Figs 242 E, 254, 259 Hypselostoma pattalungensis Panha & Burch in Panha et al. 2004: 73–75, fig. 11. Hypselostoma pattalungensis — Panha and Burch 2008: 97–98, fig. 83; Dumrongrojwattana and Wongkamhaeng 2024: 324, fig. 8. Type locality. “ Ko Si Ko Ha (Ko Na Thewada), Limestone Hill, Pattalung Province ” (Thailand). Type material examined. Thailand • 3 paratypes; from the type locality; S. Panha leg.; SMF 331456. Additional material examined. Thailand • 3 shells; Phattalung Province, 6.4 km E of Hwy. 4081, 1 km SW of Khao Chai Son; 7°27'N, 100°11'E; 50 m a. s. l.; 11 Apr. 1988; K. Auffenberg leg.; locality code KA-0648; UF 345066 • 1 shell; same locality data as previous; UF 591338 • 13 shells; Songkhla Province, 31.3 km NW Hat Yai, 1.2 km W of Hwy. 43; 7°10'N, 100°16'E; 80 m a. s. l.; 08 Apr. 1988; K. Auffenberg leg.; locality code KA-0636; UF 344933 • 1 shell; same locality data as previous; 08 Apr. 1988; K. Auffenberg leg.; locality code KA-0635; UF 591337. Differential diagnosis. This species is most similar to H. fortunatum sp. nov., from which it differs by stronger and more numerous apertural barriers, separated angular and parietal lamellae as well as the higher spire. Distribution. This species is known from Phattalung and Songkhla provinces, Thailand. Remarks. Intraspecific variability is noticed on the appearance of the subcolumellar lamella, it can be present or completely absent.