Dicharax birugosus (Godwin-Austen, 1893)

Fig. 60

Alycaeus bi-rugosus Godwin-Austen, 1893: 593 .

Alycaeus birugosus var. minor Godwin-Austen, 1914: 370, pl. 155 figs 9, 9a.

Alycaeus bi-rugosus – Godwin-Austen 1897: 387, pl. 63 figs 5, 5a.

Alycaeus (Dicharax) birugosus – Kobelt 1902: 366.

Alycaeus birugosus – Godwin-Austen 1914: 370, 387.

Alycaeus canaliculus Godwin-Austen, 1914: 371, pl. 154 fig. 11.

Alycaeus birugosus var. – Godwin-Austen 1914: 370, pl. 154 figs 7, 7a.

Alycaeus (Chamalycaeus) canaliculus – Gude 1921: 225.

Alycaeus (Dicharax) birugosus – Gude 1921: 239–240.

Alycaeus (Dicharax) birugosus var. minor – Gude 1921: 240.

Chamalycaeus (Chamalycaeus) canaliculus – Ramakrishna et al. 2010: 53.

Chamalycaeus (Dicharax) birugosus – Ramakrishna et al. 2010: 57.

Dicharax (?) birugosus – Páll-Gergely et al. 2020: 79, fig. 19 (treated A. canaliculus as a junior synonym).

Diagnosis

The characteristic, oblique main R3 swelling, and the small secondary swelling distinguish this species from its congeners. See under Dicharax umashaankeri sp. nov.

Type material examined

INDIA • 2 syntypes of A. birugosus (Fig. 60A–E); Khasi Hills; Godwin-Austen leg.; NHMUK 1903.7.1.2628 • 1 syntype of Alycaeus birugosus var. minor (labelled as duorugosus var. minor); Garo Hills; NHMUK 1903.7.1.2755 • 1 syntype of A. canaliculus (Fig. 60F–J); Teria Ghat, Khasi; Godwin-Austen leg.; NHMUK 1903.7.1.2764 .

Additional material examined

INDIA • 7 shells (labelled as “ birugosus var.”); Jawai, Jiantia Hills, 282a; Godwin-Austen leg., NHMUK 1903.7.1.2571 .

Type localities

“Khasi Hills and Manipur ” ( A. birugosus); “Garo Hills” ( A. birugosus var. minor); “Teria Ghat, foot of the Khasi Hills” ( A. canaliculus).