Nodopomatias oakesi ( Godwin-Austen, 1917 )

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 : 19

Nodopomatias oakesi ( Godwin-Austen, 1917)

Fig. 8 E

Eupomatias oakesi Godwin-Austen, 1917 : p. 580, Figs 5 d, 6b. Nodopomatias oakesi — Gude 1921: p. 161.

Diagnosis. A medium sized, tumid species with very weak peristome margin and a basal keel situated close to the umbilicus.

Description. Shell light brownish-yellowish; turriform, widest at its base; the 7.25–7.5 rather flat whorls (n=3) are separated by shallow suture; the boundary of the protoconch was not visible on the three specimens examined because of corrosion; approx. the first whorl of the protoconch seemed to be smooth, glossy, the second whorl is extremely finely ribbed; ribs are regular on the whole shell, even behind the aperture; basal keel with blunt ribs; keel starts behind the aperture (a bit left from the lowermost point) and ends behind the columellar-basal meeting point of the aperture; aperture rounded with slight upper incision (parietal-palatal transition); parietal-columellar transition is not angled; apertural rim slightly thickened and not, or very slightly reflexed; it consists of two circles, a wider outer and a very thin inner; the boundary between these visible only from apertural view, from lateral view the aperture seems to be simple.

Measurements (in mm). H: 11.0, D: 3.8 (n=1).

Differential diagnosis. Nodopomatias oakesi is much smaller than N. sibbumensis , has a more corpulent shell and weaker basal keel.

Type material. Abor Hills, leg. Oakes, Godwin-Austin Collection, NHMUK 1903.7.1.3086. (3 syntypes).

Distribution. Nodopomatias oakesi 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 5. SEM images of the protoconch (A – B) and operculum (C, E – F: outer side, D: inner side) of Pseudopomatias sp. A. P. nitens n. sp., HNHM 98834; B. P. amoenus Möllendorff 1885, China, Yunnan, Yiliang Xian, Jiuxiang Fengjingqu, 1818 m, 25 ° 04.27306 ' N, 103 ° 22.87032 ' E, leg. Nakahara, Y., Ohara, K., Okubo, K. & Otani, J. U., 10.06. 2005., coll. PGB; C. P. amoenus, Indochine, leg. Messager, MNHN 2012 - 26983; D. P. amoenus, Tonkin, Muong-Hum, between Muong-Hum and the Clouds Pass (Col de Nuages), near the latter one, more than 2000 m a. s. l., leg. Messager, MNHN 2012 - 26997; E – F. P. e o s, Nantou Xian, Renai Xiang, Meifeng-Songgang road, around km 14, 2120 m asl., 24 ° 05.103 ' N 121 ° 10.257 ' E, leg. Hunyadi, 20.10. 2014.

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.