Clostophis sankeyi Benson, 1860

Páll-Gergely, Barna & Hunyadi, András, 2022, New and little-known species of Clostophis Benson, 1860 from Southeast Asia (Gastropoda: Eupulmonata: Hypselostomatidae), Raffles Bulletin of Zoology 70, pp. 417-439 : 419

Clostophis sankeyi Benson, 1860

( Figs. 1 , 2 )

Clostophis sankeyi Benson, 1860: 95 .

Clostophis sankeyi — Páll-Gergely et al., 2020: 352, fig. 3 A. Material examined. 1 shell (coll. HA, Fig. 2 ), Myanmar, Mon Province , Mawlamyine centre ENE ca. 26 km, Dhammasa Cave, 8 m a.s.l., 16°30.403′N, 97°48.646′E (locality code 2018/49a), coll. A. Hunyadi, K. Okubo & J.U. Otani, 11 October 2018 ; 1 shell (coll. HA, Fig. 1 ), Myanmar, Mon Province , Mawlamyine NE ca. 14 km, Kalagon, Kha Yone Cave, 0 m a.s.l., 16°31.986′N, 97°42.910′E (locality code: 2018/50), coll. A. Hunyadi, K. Okubo & J.U. Otani, 11 October 2018 .

Measurements (in mm). SH = 1.53, SW = 1.41 (2018/49a); SH = 1.34, SW = 1.22 (2018/50).

Remarks. In our previous paper ( Páll-Gergely et al., 2020) we reported this species from two localities, but they were not figured. Here we figure both shells and add the following observation. The holotype and specimen from locality 2018/50 lack a parietal tooth ( Fig. 1B, E, G ), whereas the shell from locality 2018/49a has a blunt, low, but clearly visible parietal tooth ( Fig. 2B, E ). The presence or absence of the parietal tooth is best interpreted as part of intraspecific variability, because all other traits of the three examined available shells are similar.

Figures

Fig. 1. Clostophis sankeyi Benson, 1860, from locality 2018/50.

Fig. 2. Clostophis sankeyi Benson, 1860, from locality 2018/49a.