pterocycloides (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

76. pterocycloides (Pfeiffer, 1855) Fig. 10H, I

Cyclostoma (Cyclotus) pterocycloides Pfeiffer, 1855a [1854]: 300.

Pterocyclos anomalus Reeve, 1863: volume 14, Pterocyclos , pl. 5, species 27. Type locality: Borneo.

Cyclotus pterocycloides - Kobelt 1902: 216.

Current generic position.

Cyclotus Swainson, 1840

Type locality.

Unknown.

Type material.

Lectotype (design. n.) NHMUK 20170361/1 (Fig. 10H), paralectotypes NHMUK 20170361/2-3 (2 shells; Fig. 10I).

Remarks.

Reeve (1863) erroneously replaced the previously available name "pterocycloides Pfeiffer, 1855" with "anomalus Reeve, 1863". This unnecessary substitution is therefore made available with it own authorship and date and is considered to be a junior objective synonym ( ICZN 1999: Arts. 19.1, 33.2, 50.5 and 60.1).

Pfeiffer (1855a) stated that this species was described based on specimens from the Cuming collection. The original description did not include an illustration or collection locality, and only one set of shell measurements were given. The type lotcontains four specimens of the same species, however an original label records that this is a mixed lot containing three specimens from the Cuming collection and 1 specimen with an operculum presented by GB Sowerby I. Specimen NHMUK 20170361/1 has no operculum, is without collection locality but has an original label in Pfeiffer’s handwriting stating "Cyclost. pterocycloides Pfr.". This specimen, that matches with the description and shell measurements given in the original description, and the illustration in Reeve (1863), is here designated as the lectotype to stabilise the name. The other two shells, NHMUK 20170361/2-3, from the Cuming collection lot therefore become the paralectotypes.

The remaining a single shell with an operculum, NHMUK 1886.9.10.1, which was presented by GB Sowerby I and has the collection locality “Borneo” is excluded from the type series.