Tonkinospira pulverea (Bavay & Dautzenberg, 1908)

Jochum, Adrienne, Slapnik, Rajko, Kampschulte, Marian, Martels, Gunhild, Heneka, Markus & Pall-Gergely, Barna, 2014, A review of the microgastropod genus Systenostoma Bavay & Dautzenberg, 1908 and a new subterranean species from China (Gastropoda, Pulmonata, Hypselostomatidae), ZooKeys 410, pp. 23-40 : 32

Tonkinospira pulverea (Bavay & Dautzenberg, 1908) Figure 3

Helix (Systenostoma) pulverea Bavay & Dautzenberg, 1908: Journal de Conchyliologie, 56: 243. [ “Phu-Quoc-Oai”].

Helix (Systenostoma) pulverea - Bavay and Dautzenberg 1909: Journal de Conchyliologie, 57: 194-195, Plate 8, Fig. 7-9. ["Vit sur les rochers de Phu-Quoc-Oaï”]

Systenostoma pulverea - Pilsbry 1917: Manual of Conchology …: 225, Plate 38, Figs 10-12.

Material examined.

Helix (Systenostoma) pulverea Bavay & Dautzenberg, 1908 (1 specimen), RBINS Dautzenberg Collection reg. nr. IG 10591 (tray 844), probably syntype.

Remarks.

The teleoconch shows rather regular, very fine spiral threads. These spiral lines are more numerous than in the other two examined species. The spiral lines are decussated. Irregular, impressed varices occur at intervals across the whorls. At higher magnification, the shell shows a highly flocculent texture.