Pincerna costulosus Bavay & Dautzenberg, 1912

Sang, Do Duc & Son, Nguyen Thanh, 2022, The land snail genus Pincerna Preston, 1907 (Gastropoda: Alycaeidae) from Vietnam and Laos, with description of a new species, Raffles Bulletin of Zoology 70, pp. 364-375 : 365-369

publication ID	https://doi.org/10.26107/RBZ-2022-0018
publication LSID	lsid:zoobank.org:pub:E3A5AA23-BEAE-445E-981F-93A9E7A79417
persistent identifier	https://treatment.plazi.org/id/03A68780-FFC5-FFA9-8F0C-06F17B0F14B9
treatment provided by	Felipe
scientific name	Pincerna costulosus Bavay & Dautzenberg, 1912
status

Treatment

Pincerna costulosus Bavay & Dautzenberg, 1912 View in CoL

( Figs. 1 View Fig , 2D, E View Fig , 6C View Fig ; Tables 1, 2)

Alycaeus costulosus Bavay & Dautzenberg, 1912: 49 View in CoL , pl. 4, figs. 1–4 ( type locality: Phong Th ổ, Lai Châu, Vietnam).

Pincerna costulosa View in CoL – Páll-Gergely et al., 2017: 10, fig. 3F; 2020: 172; Chen & Wu, 2020: 45, figs. 1, 4C, D.

Types examined. Phong Tho, Tonkin, col. Messager, MNHN-IM-2000-31786 ( syntypes) ( Fig. 2D View Fig ); Phong-Tho, col. Messager, No. 29, RBINS 525426 About RBINS .

Additional material examined. ZMHU/ 4 View Materials ( Fig. 2E View Fig ), Vietnam, Lai Châu Province, Phong Th ổ District, Kh ổng Lào

Commune, limestone outcrops, 22°35′20″N, 103°23′52″E, 889 m above sea level (a.s.l.), col. D.S. Do & V. T. Sin, 14 July 2015 GoogleMaps .

Diagnosis. Pincerna costulosus is characterised by a small sized, translucent, high conical shell with strongly, regularly ribs on R1, and R2 extremely short.

Distribution. Pincerna costulosus is known from northwestern Vietnam ( Lai Châu Province) and Southwest China ( Yunnan Province) ( Chen & Wu, 2020).

Remarks. The species is quite stable in terms of shell characters, although only a few shells are known. Pincerna costulosus has been recently recorded from Xishuangbanna, Yunnan Province, China ( Chen & Wu, 2020). The present record extends the distributed range circa 400 km to the west.