Pseudopomatias peguensis ( Theobald, 1864 )

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 : 25

Pseudopomatias peguensis ( Theobald, 1864)

Fig. 10 F

Pomatias sp. — Blanford 1864: p. 463.

Pomatias Peguense Theobald, 1864: p. 248.

Pomatias Peguensis — Hanley & Theobald 1870: p. 4, plate 7, Fig. 8 . Pomatias peguensis — Nevill 1878: p. 255.

Pseudopomatias Peguensis — Möllendorff 1885: p. 164. Pseudopomatias peguensis — Möllendorff 1886: p. 179. Pseudopomatias peguensis — Kobelt & Möllendorff 1897: p. 140. Pseudopomatias peguensis — Kobelt 1902: p. 274.

Pseudopomatias peguensis — Gude 1921: pp 159, 160.

Diagnosis. A small to medium sized, slender turriform species with weak sculpture, bulging whorls (deep suture) and very thin apertural margin.

Description. Shell yellowish-greenish, very slender turriform, widest at its base; the 7.25–8.25 (n=4), very much bulging whorls are separated by deep suture; protoconch consists of 2 whorls, first half whorl is very finely granulated, glossy; the remaining whorls are very finely, regularly ribbed; teleoconch also finely, regularly ribbed without spiral lines; ribs very low, they become less regular on the last half whorl; aperture rounded with very slightly angled columellar-parietal transition and slightly more sharply angled parietal-palatal transition; apertural rim whitish, slightly thickened and usually not, or very slightly reflexed; it consists of a slimmer inner and a wider outer circle; the boundary between them is hardly visible.

Measurements (in mm). H: 7.9–10.4, D: 3.6–4.1 (NHMUK 1906.5.5.9, n=3).

Differential diagnosis. Pseudopomatias peguensis has deeper suture and more bulging whorls than any other Pseudopomatias species. The most similar species in size, shell shape and morphology of the apertural lip is P. amoenus which has a shallower suture and stronger ribs.

Type material. According to Dance (1986) some shells of Theobald’s material is in the NHM, the Indian Museum, and Cambridge Museum, a few types in Cardiff Museum (excoll Fedden). We contacted these museums (except Indian Museum) but we were unable to locate the type specimens.

Museum material. Pegu, Burmah, Fedden collection, NMW.1894.015/6; no locality, coll. Godwin-Austen, NHMUK 20130403/1; Gwah Hill, Pegu, Burma, E.R. Sykes coll, Acc. no. 1825, NHMUK 20130404/2; Gwah Hill, NHMUK 1888.124.331–4/4; Gwa, Arakan, W. Blanford coll, NHMUK 1906.5.5.9/7.

Distribution ( Fig. 11 ): The type locality of the species is Pegu (=Bago, Myanmar). Blanford (1864) mentioned Theobald’s new species from Arakan, and later, Nevill (1878) and Möllendorff (1886) marked "Mai, Sandoway". Both the Arakan Mts (Rakhin State) and Sandoway are located in western Myanmar, whereas Bago Province lies eastwards. See also Table 3 .

Figures

FIGURE 11. Distribution of Pseudopomatias species. Filled circle: P. pe g ue ns i s (Theobald, 1864); open triangle, top up: P. nitens n. sp.; open circle: P. amoenus Möllendorff 1885 s. l.; empty square: P. e o s Pilsbry & Hirase 1905; script " Shan States ": Pseudopomatias shanensis n. sp. The meaning of the numbers: 1: Sandoway, 2: Pegu, 3: locality of P. amoenus near Jiuxiang Fengjingqu, 4: locality of P. amoenus near Kongshan Cun, 5: Northern Vietnamese and Chinese localities of P. amoenus and P. nitens n. sp., 6: Mau Son, That Khé and the new localities of " typical fulvus " (= P. amoenus), 7: Xuan Son National Park; 8: Cuc Phuong National Park, 9: Chengkou (type locality of Fargesia cornea), 10: locality near Mufu Cun (new locality of typical P. amoenus), 11: Badong (type locality of P. amoenus), 12: Changyang (locality of P. nitens n. sp.), 13: Hengshan (possible position of the type locality of P. amoenus var. tumidula), 14: Guiyan Xian (possible position of the type locality of P. amoenus var. tumidula), 15: Nanling Guojia (see Hu et al. 2004).

FIGURE 10. A. Pseudopomatias prestoni n. sp., holotype, NHMUK 20130423.1; B. P. prestoni n. sp., Indien, NHMW 109194; C. P. siyomensis Godwin-Austen, 1917, holotype, NHMUK 3406.03.7.1; D. P. himalayae, Himalaya, Darjiling, NHMUK 1860.6.27.32.1; E. P. himalayae, syntype, UMZC 102695; F. P. peguensis (Theobald, 1864), Pegu, Burmah, NMW. 1894.015; G. P. shanensis n. sp. holotype, NHMUK 1903.7.1.1631.1; H. P. reischuetzi n. sp., holotype, NHMUK 1903.7. 1.1549. 1. Photos: A, C – D, G – H: H. Taylor; B: J. Harl; E: J. Gundry; F: B. Rowson. 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.

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.