Dicharax (?) tsushimanus (Pilsbry & Y. Hirase, 1909)

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

Dicharax (?) tsushimanus (Pilsbry & Y. Hirase, 1909)

Alycaeus (Metalycaeus) tsushimanus Pilsbry & Y. Hirase, 1909a: 586-587.

Chamalycaeus tsushimanus - Azuma 1982: 11, pl. 4, fig. 38; Minato 1988: 15.

Type locality.

"Tsushu, Tsushima".

Material examined.

ANSP 95737 (lectotype, designated by Baker 1964, photographs examined); 長崎縣 1壹岐神社 (Nagasaki-ken, Iki-jinja = Nagasaki Prefecture, Iki Shrine), Sakura coll., NSMT-Mo 79100 (2 shells).

Remarks.

Protoconch relatively low, very finely granulated, moderately glossy; R2 with ca. 22 low, blunt, irregular ribs which are connected to each other near the tube but are free further away from there; distance between ribs at edge of body whorl less than the a rib width; no spiral lines are visible on the teleoconch.