Dicharax nitidus (W.T. Blanford, 1862 )

Dicharax nitidus (W.T. Blanford, 1862) View in CoL

Fig. 55

Alycaeus nitidus W.T. Blanford, 1862: 141 View in CoL .

Alycaeus kurzianus Theobald & Stoliczka, 1872: 330 View in CoL , pl. 11 fig. 2. Syn. nov.

Alycaeus kurzianus View in CoL – Sowerby 1877: pl. 3, species 22. — Godwin-Austen 1914: 409–410, pl. 151 figs 7, 7a.

Alycaeus nitidus – Sowerby 1877: pl. 3, species 25. — Godwin-Austen 1914: 421–422, pl. 151 figs 4, 4a.

Alycaeus ( Chamalycaeus) nitidus View in CoL – Kobelt 1902: 360. — Gude 1921: 230–231.

Alycaeus ( Dicharax) kurzianus View in CoL – Kobelt 1902: 373. — Gude 1921: 258–259.

Chamalycaeus ( Chamalycaeus) nitidus View in CoL – Ramakrishna et al. 2010: 54.

Dicharax nitidus View in CoL – Páll-Gergely et al. 2020: 68 View Cited Treatment .

Dicharax (?) kurzianus View in CoL – Páll-Gergely et al. 2020: 90 View Cited Treatment , fig. 91.

Type material examined

MYANMAR • 3 possible syntypes of A. nitidus ( Fig. 55A–E); Manya Khyoung, Arakan; Blanford coll.; NHMUK 1906.4 About NHMUK .4.54 • 3 probable syntypes of A. kurzianus (labelled as “ kurtzianus ”; the locality does not match with the original description, but the specimens are identical to the figured one) ( Fig. 55F–J); Nr. Prome, Pegu; F. Stoliczka leg.; NHMUK 1903.7 About NHMUK .1.2700 • 1 syntype of A. kurzianus ; Nattoung, Prome; W. Theobald coll.; NZSI M.24974 • 6 syntypes of A. kurzianus ; same data as for preceding; NZSI M.25021 .

Type localities

“prope Tongoop in Arakan ” ( A. nitidus ); “Nattoung in provincia Barmana, Prome dicta” ( A. kurzianus ).

Differential diagnosis

The most similar species due to the tiny, glossy shell and the short R2 is D. habiangensis , which has a larger R3 swelling and a basally rounded aperture. See also under D. semivivus sp. nov.

Remarks

Dicharax nitidus and D. kurzianus agree in all important traits (shell and aperture shape, shell size, length of shell regions, sculpture), and no notable difference was found between them. Therefore, D. kurzianus is a junior synonym of D. nitidus . The two species were not compared in the original description of D. kurzianus .

Dicharax nitidus was described from Tongoop (Taungup Pass at 18°40.1′ N, 94°44.5′ E), whereas D. kurzianus from Nattoung, which could not be located on the map. According to the additional information about Nattung, it is in “Mendon District, Pegu ”, and close to Prome (= Pyay). A mountain with the name “Nattaung” is located at 18°48.6′ N, 97°2.2′ E, ca 190 km east from Pyay, therefore it is probably not the same as Nattung. Nevertheless, the Taungup Pass and Pyay are situated geographically close to each other.