Paropeas turricula ( von Martens, 1860 )

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

25 Paropeas turricula ( von Martens, 1860)

Fig. 12 G, H , Table 1

Stenogyra turricula von Martens, 1860: 9. Type locality: Siam [ Thailand]. von Martens 1867: 82, 83, pl. 22, fig. 7.

Paropeas turricula — Naggs 1994: 188. Maassen 2001: 81.

Prosopeas turricul a — Pilsbry 1906: 30, 31, pl. 3, figs 95, 96. Inkhavilay et al. 2019: 52.

Type specimens.

Syntypes NHMUK 1859.8. 1.10 (3 shells; Fig. 12 G ) from Siam.

Other material.

Phra (Buddha) Cave, Tanintharyi Region, Myanmar (11 ° 14 ' 01.5 " N, 99 ° 10 ' 42.8 " E): CUMZ 13075 (1 shell). The limestone karsts located close to Lampane Village, Tanintharyi Region, Myanmar (11 ° 40 ' 18.1 " N, 99 ° 13 ' 30.1 " E): CUMZ 13076 (2 shells; Fig. 12 H ).

Description.

Shell slender, conical, translucent, whitish colour, and with 8–8 ½ whorls. Apex rounded; protoconch ~ 2 whorls, turreted and with nearly smooth to fine radial striations; subsequent whorls with dense and fine radial striations. Spire high, turreted, gradually, and cylindrically tapering; whorls flatly convex, last three whorls nearly equal; suture deep. Aperture narrowly ovate and elongate; peristome thin; columella truncated and concave; columellar margin slightly expanded. Umbilicus narrowly opened to closed.

Distribution.

This species was first described in Thailand, then subsequently recorded in Laos and Malaysia ( Naggs 1994; Maassen 2001; Inkhavilay et al. 2019), and is here reported from the Tanintharyi Region, Myanmar.

Remarks.

Paropeas turricula can be differentiated from P. tchehelense by its slender shell, cylindrically turreted spire, and finer striations, while P. tchehelense has a broader and larger shell, a more rounded and broader spire, and stronger radial striations. This species can also be separated from P. terebralis from Shan State by having finer sculpture, flatly convex whorls, shallower suture, and embryonic whorls that are more turreted with nearly smooth to weaker striations, whereas P. terebralis displays a more elongated shell, thicker sculptures, more convex whorls, deeper suture, and embryonic whorls more rounded with stronger striations. Paropeas swettenhami has a larger shell, stronger striations, and wider and more deeply concave columella.

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).