Pincerna Preston, 1907

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

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-FFAD-8D7A-040B7C2517D8

treatment provided by

Felipe (2022-10-09 04:40:11, last updated by Plazi 2023-11-07 17:55:31)

scientific name

Pincerna Preston, 1907
status

 

Genus Pincerna Preston, 1907 View in CoL

Alycaeus (Pincerna) Preston, 1907: 206 . Type species: Alycaeus

(Pincerna) liratula Preston, 1907, by monotypy. Alycaeus (Cycloryx) Godwin-Austen, 1914: 334 . Chamalycaeus View in CoL (Cyclory x) – Thiele, 1929: 108; Wenz, 1938: 478. Alycaeus (Pincerna) – Thiele, 1929: 108; Wenz, 1938: 479;

Egorov, 2013: 33. Chamalycaeus (Cycloryx) – Egorov, 2013: 36. Pincerna – Páll-Gergely, 2017: 214; Páll-Gergely et al., 2017: 10;

2020: 167; Vermeulen & Liew, 2022: 27.

Diagnosis. Shell globose to conical, usually translucent; whorls 3½–5, increase regularly; protoconch glossy, smooth, 1–1¾ whorls; R1 usually with strong, regularly spaced ribs and weak spiral striation; R2 smooth to prominently ribbed, usually short, with slender, relatively dense and regular ribs; umbilicus narrow and often closed by the reflected columellar extension of peristome; Operculum thin, translucent, usually flat on both the outer and inner surfaces ( Egorov, 2013; Páll-Gergely, 2017; Páll-Gergely et al., 2020; Vermeulen & Liew, 2022: 27).

Distribution. The genus Pincerna is widely distributed in Asia from the southeastern Himalayas to Laos, Vietnam, the Malay Peninsula, Sumatra, and northern Borneo (PállGergely et al., 2020; Vermeulen & Liew, 2022).

Remarks. Pincerna is probably most closely related to Stomacosmethis , which is similar in shell size and shape (Páll-Gergely et al., 2020). The shells of Pincerna species are all globular, with more widely spaced ribs on R1, not colourful, mostly white and translucent, thin operculum, which is relatively flat on both the outer and inner surface. In contrast, the shells of Stomacosmethis species are triangular with densely ribbed on R1, extremely short R2, usually brightly coloured yellow or orange, thin operculum with outer surface usually elevated ( Foon & Liew, 2017; PállGergely et al., 2020).

Egorov RV (2013) Treasure of Russian Shells. Supplement 3. A review of the genera of the terrestrial pectinibranch molluscs (synopsis mainly based on published data). Part III. Littoriniformes: Liareidae, Pupinidae, Diplommatinidae, Alycaeidae, Cochlostomidae. R. Egorov, Moscow, pp. 1 - 61.

Foon JK & Liew T-S (2017) A review of the land snail genus Alycaeus (Gastropoda, Alycaeidae) in Peninsular Malaysia. ZooKeys, 692: 1 - 81.

Pall-Gergely B, Hunyadi A, Do SD, Naggs F & Asami T (2017) Revision of the Alycaeidae of China, Laos and Vietnam (Gastropoda: Cyclophoroidea) I: The genera Dicharax and Metalycaeus. Zootaxa, 4331: 1 - 124.

Preston HB (1907) Description of a new subgenus and species of Alycaeus from Ke-Lan-Tan. Proceedings of the Malacological Society of London, 7: 206.

Thiele J (1929) Handbuch der systematischen Weichtierkunde, Teil 1. Verlag von Gustav Fischer, Jena, 376 pp.

Vermeulen JJ & Liew T-S (2022) Land snails and slugs of Sabah and Labuan (Malaysia). Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah, Kota Kinabalu, x + 432 pp.

Wenz W (1938) Gastropoda I. Allgemeiner Teil und Prosobranchia. In: Schindewolf OH (Ed.) Handbuch der Palaozoologie. Bd. 6 (1). Borntraeger, Berlin, 240 pp.

Kingdom

Animalia

Phylum

Mollusca

Class

Gastropoda

Order

Architaenioglossa

Family

Alycaeidae