Pseudopomatias pallgergelyi Jirapatrasilp, 2022

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

Pseudopomatias pallgergelyi Jirapatrasilp sp. nov.

Fig. 9E, F

Type material.

Holotype CUMZ 12167/1 (Fig. 9E ), 18 Jan. 2015, coll. C. Sutcharit, P. Jirapatrasilp, W. Siriwut, R. Srisonchai, T. Seesamut. Measurement: shell height 14.5 mm, shell width 4.9 mm and 11 whorls. Paratypes CUMZ 12167/2-4 (3 shells; Fig. 9F ) and NHMUK 20210332 (1 shell), same data as holotype.

Type locality.

Pha Daeng Cave, Mueang Mae Hong Son District, Mae Hong Son Province, Thailand, 19°25'23.9"N, 97°59'03.1"E, 270 m amsl.

Diagnosis.

Shell elongate turriform; ca. 11 whorls, with regular strong ribs separated by wide space. Area between ribs with very fine spiral striation. Outer peristome expanded and strongly reflected.

Differential diagnosis.

Pseudopomatias pallgergelyi sp. nov. can be distinguished from P. caligosus and P. shanensis by a more slender shell shape with more whorls that are less bulging, stronger ribs that are nearly twice as widely spaced, and a more expanded and strongly reflected outer peristome.

Description.

Shell height 14.0-14.6 mm; shell width 4.8-5.1 mm. Shell elongate turriform, widest at its base, solid, semi-transparent, whitish to pale pinkish. Whorls ca. 11 with sutures deep. Protoconch ca. 2 whorls (slightly eroded), first ca. 1½ whorl very finely granulated; remaining whorls and teleoconch very finely, regularly ribbed every 0.4-0.5 mm; ribs strong 0.1 mm wide, triangular in cross section. Area between ribs with very fine spiral lines, visible only under high magnification (> 20 ×). Last whorl with 20-26 ribs. Apex obtuse. Spire angle ca. 30°. Aperture rounded with very slightly angled columellar-parietal transition and more sharply angled parietal-palatal transition appearing as indentation; outer peristome expanded and strongly reflected (0.5-0.6 mm wide and 0.5 mm thick), white to pale pinkish in colour. Umbilicus closed. Operculum unknown.

Etymology.

The specific epithet is dedicated to B. Páll-Gergely, a Hungarian malacologist who extensively studies the taxonomy and systematics of Southeast Asian land snails, especially revising the taxonomy of the genus Pseudopomatias .

Distribution.

Known only from the type locality.

Figures

Figure 9. A, B Pseudopomatias caligosus: A holotype HNHM 100176 and B specimen CUMZ 12191 from Pa Tham Wua Temple, Mae Hong Son C, D Pseudopomatias doiangkhangensis sp. nov. C holotype CUMZ 12165 / 1 and D paratype CUMZ 5219 from Doi Ang Khang, Chiang Mai E, F Pseudopomatias pallgergelyi sp. nov. E holotype CUMZ 12167 / 1 F paratype CUMZ 12167 / 2 from Pha Daeng Cave, Mae Hong Son. Photo: B. Pall-Gergely (A).