Dicharax elevatus (Heude, 1886)

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 elevatus (Heude, 1886) Fig. 16

Alycaeus elevatus Heude, 1886: 210.

Alycaeus elevatus - Heude 1890: 129, pl. 36, fig. 19.

Alycaeus (Chamalycaeus) elevatus - Kobelt and Möllendorff 1897: 148; Kobelt 1902: 355.

Metalycaeus (?) elevatus - Páll-Gergely et al. 2017: 104-105, fig. 69I.

Type locality.

"Tchen K’eou”.

Material examined.

Cheng-Kou County, Chong-qing, China, HMT-218a, deposited in IZCAS (syntype: labelled as lectotype, but probably there was no valid lectotype designation). No type specimens deposited in American museums were reported by Johnson (1973).

Remarks.

This species could be examined for the first time, since it was not examined in our previous paper ( Páll-Gergely et al. 2017). Protoconch low, smooth; R1 without spiral striation, its beginning is densely, finely ribbed, which gradually changes to a more widely-spaced, strongly ribbed surface. R2 and R3 are of comparable length, R2 ribs dense, low, blunt, not elevated. The most similar species is D. fargesianus , which has denser ribs on R1 and R3, and more marked swelling on R3.

The examined specimen has a shorter R3 than the one illustrated by Heude (1890) (see also Páll-Gergely et al. 2017: fig. 69I). This raises some doubts about the identity of this type.

Figures

Figure 16. Dicharax (?) elevatus (Heude, 1886), syntype (HMT- 218 a). Photographs: Kaibaryer Meng.