Dicharax (?) itonis (Kuroda, 1943)

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 (?) itonis (Kuroda, 1943) Fig. 13D

Chamalycaeus (Sigmacharax) itonis Kuroda, 1943: 8-11, figs 1-4.

Chamalycaeus (Sigmacharax) itonis itonis - Minato 1987b: 76-77, figs 1-3; Minato 1988: 16, pl. 2, fig. 2.

Chamalycaeus (Sigmacharax) itonis - Azuma 1982: 12, pl. 4, fig. 40; Hanshin Shell Club 1986: pl. 2, figs 5, 6.

Type locality.

"Kami-iti-mura, Bittyū, Okayama Prefecture".

Material examined.

Ura-Hikimi-Kyo, Hikimi-mach, Mino-gun, Shimane Pref., NSMT-Mo 78866 (5 shells). The holotype is deposited in NC-H004 (Kazunori Hasegawa, pers. comm.) (not examined by us).

Remarks.

Protoconch low, very finely granulated, moderately glossy; R2 with ca. 24 ribs; they are low and the entire ribbing is not clear; the ribs are not distinct entities, their boundaries are obscure since their edges merge; no spiral lines visible on R1.

Figures

Figure 13. Type species of alycaeid genus-group taxa A Dicharax hebes (Benson, 1857) (SMF 109244; type species of Dicharax) B D. (?) abei (Kuroda, 1951) (NSMT 50125; type species of Awalycaeus) C D. (?) biexcisus (Pilsbry, 1902) (NSMT 263; type species of Cipangocharax) D D. (?) itonis (Kuroda, 1943) (NSMT 78866; type species of Sigmacharax). Close-up images of the aperture are not to scale. All photographs: Barna Pall-Gergely.