Dicharax (?) oshimanus (Pilsbry & Y. Hirase, 1904)

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 (?) oshimanus (Pilsbry & Y. Hirase, 1904)

Alycaeus oshimanus Pilsbry & Y. Hirase, 1904b: 7-8.

Chamalycaeus oshimanus - Azuma 1982: 9, pl. 3, fig. 26; Minato 1988: 13.

Type locality.

"Oshima, Osumi".

Material examined.

ANSP 83385a (lectotype, designated by Baker 1964, photographs examined); 鹿児島縣 1奄美大島 (Kagoshima-ken, Amami Oshima = Kagoshima Prefecture, Amami Oshima), Sakurai coll., NSMT-Mo 79097 (2 shells).

Remarks.

Protoconch low, finely granulated, moderately glossy; R2 with ca. 32 low, blunt ribs; in one of the specimens the ribs are free from each other even near the tube; distance between ribs at edge of body whorl larger than a rib width; in the other, weathered specimens (Sakurai coll.) the regular ribs stand close to each other, similarly to that of C. laevis ; no spiral lines on the teleoconch.