Myxostoma petiverianum petiverianum ( Wood, 1828 )

Foon, Junn Kitt, 2016, Myxostoma petiverianum tenggolensis (Gastropoda: Caenogastropoda: Cyclophoridae), a new subspecies of land snail from Peninsular Malaysia, Raffles Bulletin of Zoology 64, pp. 329-334 : 331

Myxostoma petiverianum petiverianum ( Wood, 1828)

( Fig. 1 B–D, F, G)

Turbo petiverianus Wood, 1828: 18 (Type locality: not stated); Coan & Petit, 2011: 31.

Cyclostoma petiverianum Wood, 1828: 36 , pl. 6, fig. 2a (Type locality: not stated); Reeve, 1842: 98, pl. 184, fig. 13; Sowerby, 1843: 116, pl. 25, figs. 100, 101; Petit de la Saussaye, 1850: 43.

Cyclostoma (Lituus) breve Pfeiffer, 1846: 166 , pl. 24, figs. 1, 2 (Type locality: Pulo Condore [= Con Son Island , Con Đ ảo Archipelago, Vietnam]).

Myxostoma petiverianum — Troschel, 1847: 44; Kobelt, 1902: 86, 659, fig. 21; Thiele, 1929: 97; Wenz, 1938 –1944: 457, fig. 1148; Abbott, 1989: 38, text fig.; Egorov, 2016: 97–102, pl. 1.

Myxostoma petiverianus [sic] — Gray, 1847: 182.

Myxostoma breve — Pfeiffer, 1847: 111; Baird, 1850: 15; Frauenfeld, 1869: 878; Fischer, 1885: 745; Fischer, 1891: 104; Kobelt & Möllendorff, 1897: 88; Fischer & Dautzenberg, 1904: 429; Dautzenberg & Fischer, 1905: 435–437; Dang, 2008: 9.

Pterocyclos brevis — Pfeiffer, 1851: 9 (unjustified emendation); Pfeiffer, 1852a: 26; Crosse & Fischer, 1863: 364–366; Reeve, 1864: 58, pl. 1, figs. 4a, 4b; Mabille & Le Mesle, 1866: 131.

Pterocyclos (Lituus) brevis — Pfeiffer, 1852b: 42.

Cyclophorus (Lituus) brevis — Benson, 1855: 16.

Cyclophorus brevis — Pfeiffer, 1858: 40; Pfeiffer, 1865: 60; Pfeiffer, 1876: 99; Nevill, 1878: 268.

Cyclostoma lynchus Morelet, 1862: 478 (Type locality: Insula Poulo- Condor [= Con Son Island , Con Đ ảo Archipelago, Vietnam]).

Myxostoma petiveriana [sic] — Egorov, 2009: 22, fig. 30.

Remarks. Cyclostoma petiverianum Wood, 1828 , was described without a type locality. The holotype, supposedly in the NHMUK, is believed to be lost ( Coan & Petit, 2011; pers. comm. Eugene Coan, 2014). It is thus far known only from Con Son Island off southern Vietnam and Kep in southern Cambodia ( Egorov, 2016; Fig. 2 ). The species was recently redescribed in detail by Egorov (2016).

Figures

Fig. 1. Comparison of shells and opercula of Myxostoma petiverianum tenggolensis, new subspecies (A, E), and Myxostoma petiverianum petiverianum (Wood, 1828) (B–D, F–G). Arrows indicate the peristomal extension along the periphery of the last whorl. A, Myxostoma petiverianum tenggolensis, new subspecies, holotype (SH 22.9 × SD 32.7 mm) (MZUM MOG 000001), Pulau Tenggol, Malaysia; B, Myxostoma petiverianum petiverianum (Wood, 1828) (SH 24.2 × SD 36.1 mm) (USNM 316711), Con Son Island, Con Đảo Archipelago, Vietnam; C, Myxostoma petiverianum petiverianum (Wood, 1828) (SH 22.1 × SD 29.0 mm) (IRSNB p334781), southern Vietnam; D, original figure of Cyclostoma petiverianum illustrated in Wood (1828); E, operculum of Myxostoma petiverianum tenggolensis holotype (MZUM MOG 000001); F, operculum of Myxostoma petiverianum petiverianum (Wood, 1828) (USNM 316711); G, eroded operculum of Myxostoma petiverianum petiverianum (Wood, 1828) (IRSNB p334781). Photographs A and E by the author; photographs B and F, courtesy of Robert Hershler (USNM); photographs C and G by Yves Barette, courtesy of Yves Samyn (IRSNB); illustration D from Wood (1828) (no longer in copyright and digitised by the Biodiversity Heritage Library: http://dx.doi.org/10.5962/bhl.title.30661).

Fig. 2. Locality records of Myxostoma petiverianum petiverianum (Wood, 1828) (white circles) and Myxostoma petiverianum tenggolensis new subspecies (black circle): 1, Kep National Park, Cambodia (after Egorov, 2016); 2, Con Son Island, Vietnam (after Egorov, 2016); 3, Pulau Tenggol, Peninsular Malaysia (this study).