Hypselostoma tubiferum (Benson, 1856)

Figs 242 I, 260, 261

Tanystoma tubiferum Benson, 1856 a: 130 .

Hypselostoma tubiferum — Pfeiffer 1859: 325; Blanford 1863: 326; Hanley and Theobald 1870: 4, pl. 8 fig. 3; Stoliczka 1871: 173, pl. 7 fig. 1; Pfeiffer 1876 in 1875–1876: 488; Möllendorff 1891: 338; Gude 1914: 298; Pilsbry 1917: 178–179, pl. 31 figs 1–5; van Benthem Jutting 1950: 43; Zilch 1984: 163; Gojšina et al. 2022: 137, fig. 7; Tongkerd et al. 2024: 188, fig. 13 Q.

Pupa (Hypselostoma) tubifera — Nevill 1878: 193.

Material examined.

Myanmar • 6 shells; Tondung / Thyet Mio; W. Theobald leg.; NHMUK 1888.12.4.17 –22 • 35 shells; Mandalay, Patheingyi, near Shin Bodh Mell Waterfall; 21°59.281'N, 96°12.909'E; 225 m a. s. l.; 16 Oct. 2018; A. Hunyadi leg.; coll. HA • 31 shells; Mandalay, Kyaukse, Kho Nan Shin Cave Pagoda; 21°44.153'N, 96°20.229'E; 110 m a. s. l.; 17 Oct. 2018; A. Hunyadi leg.; coll. HA • 45 shells; Mandalay, Dee Dote, Waterfall; 21°42.564'N, 96°21.282'E; 185 m a. s. l.; 17 Oct. 2018; A. Hunyadi leg.; coll. HA • 3 shells; " India " (probably referring to former British India); F. F. Linter coll.; UF 00112342 • 1 shell; India (probably referring to former British India), Tankarin; 01. Jun. 1998 – 30. Jun. 1998; UF 540729 .

Type locality.

“ Thyet-Mio prope ripas fluminis Irawadi Burmanici, saxis calcareis adhaerens ” (nowadays Thayet), Myanmar.

Differential diagnosis.

This species is superficially similar to H. depressispira from which it can be separated by the concrescent angulo-parietal lamella (separated in H. depressispira) and fewer barriers in the aperture which are developed to roughly the same extent.

Distribution.

This species is, apart from the type locality, known from several localities in Mandalay, Myanmar.

Remarks.

Colouration of the animal body was observed and described by Stoliczka (1871). It was described as pale grey with blackish tentacles. Foot is short and ovate-elongated. The striking similarity of this species with H. depressispira suggests that Gyliotrachela is a junior synonym of Hypselostoma .