Dicharax (?) expanstoma (Minato, 1982)

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 (?) expanstoma (Minato, 1982)

Chamalycaeus expanstoma Minato, 1982b: 126-127, pl. 1, figs 1-4.

Chamalycaeus expanstoma - Minato 1988: 15, pl. 3, figs 1, 2.

Type locality.

"Iejima, Ujigunto Islets, Kagoshima-ken, Japan"

Material examined.

NSMT-Mo 59699 (holotype); 鹿児島縣 1宇治群島家島 (Kagoshima-ken, Uji-gunto, Iejima = Kagoshima Prefecture, Uji Archipelago, Iejima), coll. Sakurai, NSMT-Mo 79092 (2 shells).

Remarks.

Protoconch low, very finely granulated, moderately glossy, no spiral lines visible; R2 with ca. 14-20 (14 Sakurai coll., 20 on the holotype) low, blunt ribs; ribbing resembles irregular wrinkled surface; near the tube some ribs reach the neighbouring ones, and partly fuse with them; at the edge of the body whorl the ribs are not in contact, the spaces between ribs almost reaches the width of a single rib; no spiral lines on R1.