Csomapupa grandis ( Godwin-Austen, 1876 )

Páll-Gergely, Barna, Fehér, Zoltán, Hunyadi, András & Asami, Takahiro, 2015, Revision of the genus Pseudopomatias and its relatives (Gastropoda: Cyclophoroidea: Pupinidae), Zootaxa 3937 (1), pp. 1-49 : 17

Csomapupa grandis ( Godwin-Austen, 1876)

Fig. 8 B

Pomatias grandis Godwin-Austen, 1876: p. 181.

Pomatias grandis — Nevill 1878: p. 255.

Pseudopomatias grandis — Möllendorff 1885: p. 164. Pseudopomatias grandis — Möllendorff 1886: p. 179. Pseudopomatias grandis — Kobelt & Möllendorff 1897: p. 140. Pseudopomatias grandis — Kobelt 1902: p. 273.

Pseudopomatias grandis — Godwin-Austen 1917: p. 578. Pseudopomatias grandis — Gude 1921: pp 158–159.

Diagnosis. A large species with "double" suture, weak sculpture, elongated apical portion, and simple-looking but conspicuously widened peristome margin.

Description. Shell yellowish, turriform, with the upper portion of the shell (first five whorls) being slightly concave; the 7.75–8.25 (n=3), rather flat whorls are separated by shallow suture; above the suture there is a groove running parallel with it; this is present on the whole shell except of above the last one to two whorls; protoconch of two whorls; the sculpture of the first whorl is finely granulated, glossy, after that it becomes regularly ribbed; teleoconch regularly, extremely finely ribbed with no spiral lines visible; the ribs are very low and are regular even behind the aperture; aperture rather rounded; the parietal-palatal transition is slightly angled; columellar-parietal transition not angled; peristome white, very much widened and reflexed, consists of two circles; the inner one is slimmer, the outer one is much wider, expanded and reflexed; the boundary between the two circles is hardly visible, the whole periostome seems to be simple.

Measurements (in mm). H: 12–13.3, D: 4–5.6 (n=3).

Differential diagnosis. Cs. luyorensis possesses a smaller shell, deeper suture and more conspicuous parallel groove above the suture. Moreover, the peristome of Cs. luyorensis is clearly separated into two circles, but that of Cs. grandis seems to be rather simple, but widened.

Type material. Dafla Hills, Assam, India, Godwin-Austin Collection, NHMUK 1903.7.1.3438 (9 syntypes).

Distribution. Cs. grandis is known from the type locality only (see also Fig. 2 and Table 3 ).

Figures

FIGURE 2. Different areas of north-eastern India mentioned in the text. See also Table 3. 1: Sikkim, 2: Aka Hills, 3: Garo Hills, 4: Khasi Hills, 5: Dafla Hills, 6: Abor Hills, 7: Naga Hills.

FIGURE 8. A. Csomapupa luyorensis (Godwin-Austen, 1917), syntype, NHMUK 1903.7.1.3377; B. Cs. grandis (Godwin- Austen, 1876), syntype, NHMUK 1903.7.1.3438; C. Vargapupa oharai n. sp., holotype, HNHM 98837; D. Vargapupa biheli n. sp., holotype, MNHN 2012 – 27020; E. Nodopomatias oakesi (Godwin-Austen, 1917), syntype, NHMUK 1903.7.1.3086; F. Nodopomatias sibbumensis (Godwin-Austen, 1917), syntype, NHMUK 1903.7. 1.3146. Photos: A – B, E, F: H. Taylor; C – D: B. Páll-Gergely. Scale bars = 5 mm; the smaller one refers to the photos of the whole shell, the larger one refers to the photos showing the lateral and basal side of the shells.