Pollicaria myersii (Haines, 1855)

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

Pollicaria myersii (Haines, 1855)

Fig. 6F

Cyclostoma myersii Haines, 1855: 157, pl. 5, figs 9-11. Type locality: Siam [Thailand].

Pollicaria myersi [sic]-Sowerby I 1866: Pupinidae , pl. 1 (pl. 263), Pollicaria and Megalomastoma , sp. 2, fig. 11. von Martens 1867: 67. Reeve 1878: Pupinidae , pl. 8, sp. 69.

Hybocystis myersi [sic]- Fischer 1891: 108. Fischer and Dautzenberg 1904: 432.

Pollicaria myersii - Pain 1974: 175, 176, pl. 6, figs 2, 5. Hemmen and Hemmen 2001: 39. Kongim et al. 2013: 30, figs 2a, 4f, g, 6a, limestone areas of Vientiane to Luang Prabang, Laos, and probably the northern part of Thailand. BEDO 2017: 87. Sutcharit et al. 2018: 156, fig. 5-13b. Inkhavilay et al. 2019: 28, figs 15b, 18g, Ban Phone Can village, Yommalath District, Khammouan Province, Laos. Páll-Gergely et al. 2020: 40.

Pollicaria huberi Thach, 2018: 20, 21, figs 116-123. Type locality: Thakhek, Laos.

Type material examined.

Holotype of Pollicaria huberi NHMUK 20180253 (Fig. 6F ) from Thakhek, Laos.

Other material examined.

NHMUK 20090242 from Siam figured in Kongim et al. (2013: fig. 4f). CUMZ 1531, 1572 figured in Kongim et al. (2013: fig. 4g), 1591 from Pahom, Vang Vieng, Laos.

Diagnosis.

Shell height> 40 mm. Shell elongated, reddish brown to bright orange or red. Dorsal side of last whorl with very fine wrinkles. Aperture round, without apertural groove; apertural lip expanded, yellow to pale orange. Umbilicus narrow.

Differential diagnosis.

Pollicaria myersii is different from P. m. mouhoti by having an elongated purple to pale orange shell with thin periostracum, a rounded aperture, very fine wrinkles on the dorsal part of the last whorl, and a distinct karyotype pattern of (4m+6sm+2st+1t). This species also differs from P. gravida , P. rochebruni and P. crossei by having a larger shell, no apertural groove, and noticeable wrinkles on last whorl ( Kongim et al. 2010, 2013).

Distribution.

Laos and an uncertain record from northern Thailand ( Kongim et al. 2013; Inkhavilay et al. 2019).

Remarks.

No material of this species was found during this survey, and the record in Thailand needs further confirmation. The type material of this species was presumably lost ( Kongim et al. 2013). Páll-Gergely et al. (2020) treated P. huberi as a junior subjective synonym of P. myersii because the shell shape and colour, and the aperture shape of P. huberi agree with those of P. myersii , which also occurs in Laos.

Figures

Figure 6. A, B Pollicaria mouhoti monochroma: A juvenile specimen CUMZ 12182 from Tham Suea Lueang Temple, Loei and B paratype CUMZ 1562 from Tam Pha Bing Temple, Loei C-E Pollicaria mouhoti mouhoti C lectotype of Hybocystis mouhoti NHMUK 20130071 / 1 from Lao Mountains, Camboja D holotype of ' Pollicaria nicoarlingi ' MNHN-IM- 2000 - 37277, and E specimen CUMZ 12166 from Wang Daeng Cave, Phitsanulok F Pollicaria myersii, holotype of ' Pollicaria huberi ' NHMUK 20180253. Photo: F. Prugnaud, MNHN (D).