Pterocyclos anamullayensis Sutcharit & Panha

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

95. Pterocyclos anamullayensis Sutcharit & Panha sp. n. Fig. 13E, F

Pterocyclos anamullayensis Beddome [unavailable name, only written on label of specimens].

Type material.

Collection RH Beddome, Holotype NHMUK 1912.4.16.629/1 (Fig. 13E). Paratypes NHMUK 1912.4.16.629/2-4 (3 shells; Fig. 13F) from the type locality.

Type locality.

Anamalais, India [Anamalai Hills (10°20'N, 76°55'E), Kerala and Tamil Nadu states, India].

Diagnosis.

The differences between Pterocyclos anamullayensis new species, P. comatus Beddome 1881 and P. cyclophoroideus Nevill, 1881 are the elevated spire, expanded lip, stout last whorl, absence of a spiral band on periphery of the last whorl, the wing-shape of upper peripheral lip near the suture and a canal-like accessory respiratory structure. In comparison, P. comatus and P. cyclophoroideus both have a depressed spire, narrow dark brown peripheral band, wide umbilicus, and slight expansion of the upper peripheral lip. The accessory respiratory structure of P. comatus forms a nearly closed tubular structure (see Raheem et al. 2014: fig. 23d, e), while P. cyclophoroideus has a nearly closed tubular to canal shaped structure (see Raheem et al. 2014: fig. 24b, c).

Description.

Shell small to medium, elevated conic, thickened, and widely umbilicated. Apex acute; spire elevated; suture wide and depressed; whorl 4 to 5 convex and becoming increasingly regular. Shell surface nearly smooth with thin growth lines; periostracum thin, corneous to brownish colour. Last whorl rounded and stout. Shell colour monochrome with a white or brown zigzag pattern. Aperture rounded with white lip; upper peripheral-lip widely expanded with wing shaped near suture; lower part of apertural lip thickened and absent to little expanded. Accessory respiratory structure canal-like or notch shape. Operculum calcareous, concave inside and multi-lamellae outside.

Etymology.

The specific epithet is derived from the type locality.

Distribution.

This new species known only from the type locality.

Remarks.

This new species was described based on the historical collections of RH Beddome from “Anamalis”. The NHMUK 1912.4.16.629 lot consists of four shells labelled as "Pterocyclos anamullayensis Bedd." and “Type”, but this taxon name has previously never been published.