Alycaeus pyramidalis Benson, 1856

Pall-Gergely, Barna, Sajan, Sheikh, Tripathy, Basudev, Meng, Kaibaryer, Asami, Takahiro & Ablett, Jonathan D., 2020, Genus-level revision of the Alycaeidae (Gastropoda, Cyclophoroidea), with an annotated species catalogue, ZooKeys 981, pp. 1-220 : 1

Alycaeus pyramidalis Benson, 1856

Alycaeus pyramidalis Benson, 1856: 225.

Alycaeus pyramidalis - Reeve 1878: pl. 1, species 6; Godwin-Austen 1914: 427, pl. 156, figs 6, 6a; Gude 1921: 216.

Alycaeus (Alycaeus) pyramidalis - Kobelt 1902: 348-349.

Type locality.

"ad collem Therabuin, vallis Tenasserim".

Material examined.

Therabuin of Therapen (?) hill in Tenasserim, NHMUK 1888.12.4.937-938 (2 possible syntypes); No locality data, UMZC I.102830 (2 possible syntypes).

Remarks.

The two syntypes in the NHM and one of the shells from Cambridge were weathered. The third shell from Cambridge is in a good state, and its sculpture could be examined. Protoconch without particular sculpture, rather matte; R1 with low, irregular growth ridges; R2 relatively short, but much longer than typical in Stomacosmethis , the surface is irregularly wrinkled, and possibly ribbed near the suture.

Habe’s (1965) record of this species from "Khao Chong, Trang Province, peninsular Thailand" refers to Alycaeus gibbosulus .