Dicharax (?) japonicus sadoensis (Pilsbry & Y. Hirase, 1903)

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 (?) japonicus sadoensis (Pilsbry & Y. Hirase, 1903)

Alycaeus harimensis var. sadoensis Pilsbry & Y. Hirase, 1903: 128-130.

Chamalycaeus japonicus sadoensis - Minato 1988: 14.

Type locality.

"Aikawa, Sado".

Material examined.

ANSP 83895a (lectotype, designated by Baker 1964, photographs examined); 佐渡長江川左岸北斜面 標高 200 m ナラ トチ クリ 雑木林 1 個体 1982-11 矢田政治 (Sado, Nagae-gawa, sa-gan, kita-shamen, hyoko 200 m, nara, tochi, kuri zoki-bayashi, 1 kotai, 1982-11, Yada Masaji = Sado, Nagae river, left bank, north slope, altitude 200 m, mixed forest of oak [nara], Japanese horse-chestnut [tochi], and Japanese chestnut [kuri], 1 specimen, Nov. 1982, Masaji Yada), NSMT-Mo 60464 (1 shell).

Remarks.

The shell we examined was weathered, only the shape of protoconch (low) could be seen and its sculpture was not visible; R2 with ca. 22 low, blunt, irregular ribs which are joined to their neighbours at least near the tube; no spiral lines visible on the shell.