Pupina limitanea Godwin-Austen, 1897

Jirapatrasilp, Parin, Sutcharit, Chirasak & Panha, Somsak, 2022, Annotated checklist of the operculated land snails from Thailand (Mollusca, Gastropoda, Caenogastropoda): the family Pupinidae, with descriptions of several new species and subspecies, and notes on classification of Pupina Vignard, 1829 and Pupinella Gray, 1850 from mainland Southeast Asia, ZooKeys 1119, pp. 1-115 : 1

Pupina limitanea Godwin-Austen, 1897

Figs 21P-R , 24D-F

Pupina limitaneus [sic] Godwin-Austen, 1897: 40, pl. 69, fig. 4, 4a, b. Type locality: Eastern frontier of Burmah and Siam; Eastern Shan Plateau [Shan State, Myanmar].

Pupina (Tylotoechus) limitanea - Kobelt 1902: 316, 317. Gude 1921: 196. Hemmen and Hemmen 2001: 39.

Pupina brachysoma [non Ancey]- Inkhavilay et al. 2019: 29, fig. 15f, Nam Ork Roo, Ban Nathong village, Namo District, Oudomxay Province.

Type material examined.

Syntypes NHMUK 1903.7.1.2967 (10 shells; Figs 21P, Q , 24D, E ) from East of Burma & Siam.

Other material examined.

CUMZ 12043 (1 specimen in ethanol) from Pha Tub Cave , Mueang Nan District, Nan Province, 11 Oct. 2009 . CUMZ 12171 (1 shell) from Luang Sakoen Cave , Song Khwae District, Nan Province, 19 Jan. 2017 . CUMZ 12044 (2 shells; Figs 21R , 24F ) from Mae Lana junction, Pang Mapha District, Mae Hong Son Province, 18 Jan. 2015 .

Diagnosis.

Shell ovate; last whorl ca. 60% of shell height. Apertural lip highly thickened, not expanded. Both parietal and columellar teeth fin-shaped and very thickened; parietal tooth always covering posterior canal; columellar tooth either next to or covering slit-like anterior canal.

Differential diagnosis.

Pupina limitanea is most similar to P. artata in shell shape, but differs in having parietal and columellar teeth and apertural lip thickened, and a shorter last whorl.

Distribution.

Eastern Myanmar, Laos ( Godwin-Austen 1897; Inkhavilay et al. 2019), and Nan Province, northern Thailand.

Remarks.

The specimen of P. brachysoma from Oudomxay Province, Laos figured in Inkhavilay et al. (2019: fig. 15f) is different from the type materials of P. brachysoma (see below) in having a thick and large parietal tooth covering the posterior canal, whereas P. brachysoma has a sharp triangular parietal tooth which is not thickened, making the posterior canal visible. Therefore, the specimen from Oudomxay Province, Laos is herein identified as P. limitanea of the P. artata species group, whereas P. brachysoma belongs to the P. aureola species group.

As this species is highly similar to P. artata , more sampling of this species, with both morphometric and molecular phylogenetic analyses, are needed to resolve the relationship between these two species.

Figures

Figure 21. Shells of Pupina artata species group from mainland Southeast Asia A-M Pupina artata A syntype UMZC I. 102960. A and specimens B CUMZ 12011 C CUMZ 12023 D CUMZ 12038 E CUMZ 12026 F CUMZ 12015 G CUMZ 12009 H CUMZ 12001 I CUMZ 12003 J NHMUK 1906.4.4.28 K CUMZ 12037 L CUMZ 12031, and M CUMZ 12018 N, O Pupina pallens N lectotype SMF 109951 and O specimen CUMZ 12042 P-R Pupina limitanea P, Q syntypes NHMUK 1903.7.1.2967 and R specimen CUMZ 12044 S Pupina billeti, holotype MNHN-IM- 2000 - 35841 T Pupina verneaui, syntype MNHN-IM- 2000 - 35843 U, V Pupina hungerfordiana, specimens NHMUK 91.3.14.686 - 7 W, X Pupina bensoni sp. nov. W holotype CUMZ 12045 / 1 and X paratype CUMZ 12046 / 1. Photo: H. Taylor, NHM (A, P, Q), P. Maestrati, MNHN (S, T).

Figure 24. A Pupina artata, specimen CUMZ 12038 from Tham Suea Temple, Krabi B, C Pupina pallens B lectotype SMF 109951 and C specimen CUMZ 12042 from Suan Wiwek Bureau of Monks, Prachuap Khiri Khan D-F Pupina limitanea D, E syntypes NHMUK 1903.7.1.2967 from East of Burma & Siam and F specimen CUMZ 12044 from Mae Lana junction, Mae Hong Son G Pupina bensoni sp. nov., holotype CUMZ 12045 / 1. Photo: H. Taylor, NHM (D, E).