Globotrochus mellea (Bavay & Dautzenberg, 1915)

Sutcharit, Chirasak, Backeljau, Thierry & Panha, Somsak, 2019, Re-description of the type species of the genera Ganesella Blanford, 1863 and Globotrochus Haas, 1935; with description of a new Ganesella species from Thailand (Eupulmonata, Camaenidae), ZooKeys 870, pp. 51-76 : 51

Globotrochus mellea (Bavay & Dautzenberg, 1915) Figs 4H , 8

Helix ( Ganesella ?) mellea Bavay & Dautzenberg, 1915: 147, 148, pl. 5, figs 1-3.

Ganesella mellea : Richardson 1985: 139.

Globotrochus mellea : Schileyko 2011: 46.

Type locality.

Nui-Ba-Dinh, Phu-Ha, and Phu-Ly [Vietnam].

Material examined.

Type material. Only a single shell was available, viz. the syntype RBINS/MT/ 525051 ex. Dautzenberg collection (1 shell; Fig. 4H , height 18.4 mm, width 26.3 mm).

Description.

Shell. Shell medium-sized, dextral, thin and depressed trochoid. Apex acute; embryonic shell smooth. Whorls 5-6, increasing regularly, slightly convex and slightly shouldered near suture; suture wide and shallow. Shell surface with fine growth lines. Last whorl large, angular with strong peripheral keel; slightly convex beneath. Shell monochrome, light brownish and translucent. Aperture semi-ovate; lip slightly expanded and brownish; parietal callus thin. Umbilicus closed; columella small and whitish.

Remark.

Globotrochus mellea is similar to Globotrochus onestera in almost all shell characters, except for its larger last whorl, strong angular peripheral keel and more depressed trochoid shell. Therefore, we provisionally retain Globotrochus mellea as a distinct species.

Figures

Figure 4. A-C Ganesella halabalah sp. nov. A holotype CUMZ 2608 B paratype CUMZ 2599 from the type locality and C paratype ZMB 53120 from Kelantan, Malaysia D Ganesella perakensis, syntype MNHN-IM- 2000 - 1964. E-G Globotrochus onestera E lectotype MNHN-IM- 2000 - 32456 F holotype of " simonei Thach & Huber, 2017 " MNHN-IM- 2000 - 33206 and G specimen from Vietnam CUMZ 5218 H Globotrochus mellea, holotype RBINS / MT / 525051.

Figure 8. Geographic distribution of Ganesella spp. and Globotrochus spp.