Pseudopomatias linanprietoae Páll-Gergely, 2015

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 : 35

Pseudopomatias linanprietoae Páll-Gergely , n. sp.

Figs 6 D, 9G.

Pseudopomatias peguensis — Egorov 2013: p. 12, Fig. 18b.

Diagnosis. A medium sized, pale, slender turriform species with strong ribs, conspicuously thickened and reflexed peristome and plicae inside the last whorl.

Description. Shell pale, whitish to corneous, slender turriform; the 8–8.5, strongly bulging whorls are separated by very deep suture; first whorl of the protoconch smooth; other whorls very finely, regularly ribbed (similar to the teleoconch); boundary between protoconch and teleoconch hardly visible; ribs are regular on the whole shell, just behind the aperture they became more widely spaced; aperture rounded with very slightly angled columellar-parietal and parietal-palatal transitions; apertural margin white, very much thickened and reflexed, consist of an inner, slimmer circle and an outer, thicker and reflexed circle, with hardly visible boundary; parietal callus well developed. On the dorsal side of the body whorl there are four plicae of about the same size; all of them are visible in an oblique view from the aperture. First and second plicae are standing in the same line but the third and fourth are situated more dorsally. The uppermost plica is almost parallel with the upper suture, slightly descending towards the aperture. The gap between the first and second plica is very large, but the second, third and fourth plicae are situated very close to each other. Second plica horizontal or descending backwards, slim; third and fourth plicae are slightly curved with ends pointing in the direction of the umbilicus.

Measurements (in mm). H: 8.1–8.7, D: 3.4–4 (n=4).

Differential diagnosis. In terms of general shell shape, P. linanprietoae n. sp. is similar to P. himalayae and P. sophiae n. sp., but it can be distinguished from these species on the basis of the pale shell, conspicuously thickened apertural rim and the presence of inner plicae. See also under P. nit ens n. sp.

Material: Laos, Luang Prabang Prov., Nong Kiau, excoll Jose Ahuir Galindo, HNHM 98835 (holotype), HA/ 1 paratype, JAG/2 paratypes, NHMUK 20140669/1 paratype, PGB/2 paratypes.

Type locality. Laos, Luang Prabang Prov., Nong Kiau.

Etymology. The new species is dedicated to Carmen Linan Prieto, the wife of Jose Ahuir Galindo, who provided the material.

Distribution ( Fig. 15 ): The new species is known from the type locality only.

Remarks. Due to the few available shells we have not opened the shells to see possible inner plicae. There may be more, deeper situated plicae within the last whorl (see Remarks on shell characters).

Figures

FIGURE 6. Apertural margin of Pseudopomatias species. A. Pseudopomatias nitens n. sp., Tonkin, coll. Denis 1945, MNHN 2012 - 26931, paratype; B. P. sophiae n. sp., Tonkin, pris du Col de Nuages (2000 m altitude), leg. Messager, MNHN 2012 - 26952, paratype; C. P. amoenus Möllendorff 1885, same data as before; D. P. linanprietoae n. sp., Laos, Luang Prabang Prov., Nong Kiau, excoll Jose Ahuir Galindo, paratype, coll. PGB; E. P. nitens n. sp. from Sichuan, same data as before; F. P. maasseni n. sp., holotype.

FIGURE 15. Distribution of Pseudopomatias and Vargapupa n. gen. species. Empty triangle, top up: Vargapupa biheli n. sp.; filled triangle, top down: Vargapupa oharai n. sp.; empty square: Pseudopomatias maasseni n. sp., open circle: P. sophiae n. sp., closed circle: P. linanprietoae n. sp.