birostris (Pfeiffer, 1855)

Sutcharit, Chirasak, Ablett, Jonathan D. & Panha, Somsak, 2019, An annotated type catalogue of seven genera of operculate land snails (Caenogastropoda, Cyclophoridae) in the Natural History Museum, London, ZooKeys 842, pp. 1-65 : 1

15. birostris (Pfeiffer, 1855) Fig. 2J, K

Cyclostoma birostre Pfeiffer, 1855a [1854]: 300.

Pterocyclos birostris - Reeve 1863: volume 14, Pterocyclos , pl. 4, species 18.

Cyclotus birostris - Kobelt 1902: 214.

Current generic position.

Cyclotus Swainson, 1840

Type locality.

Sarawak, Borneo [Sarawak, Malaysia].

Type material.

Syntype NHMUK 20170353 (3 shells; Fig. 2J, K).

Remarks.

This species was described based on material from the Cuming collection, and only one set of shell measurements was given. Later, Reeve (1863) re-described the species and illustrated a shell from the Cuming collection. There are three specimens in the NHM collections with an original label stating "Rev C. I. f. 18 a–b”. The specimen figured herein (Fig. 2J) is closest to the illustration in Reeve (1863) and the shell dimensions given in the original description.