Tonkinospira pauperrima (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 : 31-32

Tonkinospira pauperrima (Bavay & Dautzenberg, 1908) Figure 2

Helix (Systenostoma) pauperrima Bavay & Dautzenberg, 1908: Journal de Conchyliologie, 56: 243-244. [ “Phu-Quoc-Oaï”].

Helix (Systenostoma) pauperrima - Bavay and Dautzenberg 1909: Journal de Conchyliologie, 57: 195-196, Plate 8, Fig. 4-6. [ “Trouvé à Phu-Quoc-Oaï, parmi les détritus coquilliers"]

Systenostoma pauperrima - Pilsbry 1917: Manual of Conchology …: 225-226, Plate 38, Figs 3-5.

Systenostoma pauperrima - Schileyko Ruthenica 1998: Supplement 2(2): 165, Fig. 202.

Material examined.

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

Remarks.

The whole shell, including the protoconch is covered with regular, extremely fine spiral threads. The number of threads increases from the apex towards the aperture. The spiral lines are decussated with irregular radial lines, resulting in in a reticulated surface.