Paropeas terebralis ( Theobald, 1870 )

Man, Nem Sian, Ablett, Jonathan D., Lwin, Ngwe, Sutcharit, Chirasak & Panha, Somsak, 2024, Contributions on a small collection of the former Subulinidae Fischer & Crosse, 1877 (Eupulmonata, Achatinoidea) with catalogue of the Glessula and Rishetia species recorded from Myanmar, ZooKeys 1208, pp. 173-239 : 173-239

24 Paropeas terebralis ( Theobald, 1870)

Fig. 12 F

Stenogyra (Opeas) terebralis Theobald, 1870: 401. Type locality: Shan States [Shan State, Myanmar]. Nevill 1878: 166. Pfeiffer and Clessin 1881: 321.

Bulimus (Stenogyra) terebralis — Pfeiffer 1876: 133.

Prosopeas terebrale — Pilsbry 1906: 31. Gude 1914: 363.

Paraopeas terebrali s — Naggs 1994: 188.

Type specimen.

Syntype NHMUK 1888.12. 4.1081 (1 shell; Fig. 12 F ) ex. Theobald collection from Shan States, Burma.

Diagnosis.

Shell slender, elongate turreted and rapidly attenuated; apex obtuse; subsequent whorls coarse with dense growth lines throughout. Suture wide and shallow, and whorls slightly convex. Aperture elongate ovate and narrow; columella curved; peristome little acute.

Distribution.

This species is only known from the type locality.

Remarks.

No recent material of this species was collected in this survey, and the syntype is illustrated here for the first time. Gude (1914) recognised this species as belonging to the Prosopeas , but Naggs (1994) provisionally transferred this species to the Paropeas after comparing it with the type specimen.

Paropeas terebralis can be distinguished from P. swettenhami by its broader and more rounded embryonic whorls, deeper suture and slightly convex whorls, and coarse shell surface with dense growth lines. Whereas P. swettenhami possesses narrower and pointed embryonic whorls, shallower suture and flattened whorls, and shell surface with dense and fine radial striae.

Figures

Figure 12. A – C Opeas filiforme A lectotype SMF 227532 from Gulf von Siam: Samui-Inseln B, C specimen CUMZ 13074 from Tanintharyi Region, Myanmar D Paropeas swettenhami, syntype MNHN - IM- 2000-38930 from Malacca E Paropeas tchehelense, syntype MNHN - IM- 2000-38932 from Pérak, Mont Tchéhèl F Paropeas terebralis, syntype NHMUK 1888.12. 4.1081 from Shan States, Burma G, H Paropeas turricula G syntypes NHMUK 1859.8. 1.10 from Siam and H specimen CUMZ 13076 from Tanintharyi Region, Myanmar I – L Paropeas walkeri I syntypes UMZC I. 103115. A from Andaman Island (after Preece et al. 2022: fig. 56 e) J specimen NHMUK 1885.2. 18.13–18 from Viper Id. Andamans K specimen CUMZ 13077 from Taunggyi Township, Shan State, Myanmar with embryonic whorls and aperture and L specimen CUMZ 13078 from Kalaw Township, Shan State, Myanmar with embryonic whorls and aperture. Photographs: V Gojšina & B Páll-Gergely (A), P Bourguignon (D, E).