Eremus basalis (Walker, 1869)

Tan, Ming Kai & Wahab, Rodzay Bin Haji Abdul, 2018, Notes on the taxonomy of poorly known Gryllacrididae (Stenopelmatoidea) from Brunei Darussalam, Borneo, Zootaxa 4462 (4), pp. 579-591 : 581

Eremus basalis (Walker, 1869)

( Fig. 1 )

Species examined: female holotype (NHMUK 13454796); male (NHMUK 13454780).

Description (Brunner von Wattenwyl, 1888; Karny, 1937). Size small, wingless ( Fig. 1A ). With striking, dark brown to black colour patterns ( Fig. 1A ). Head noticeably powerfully built ( Fig. 1B ). Frons rough ( Fig. 1C ). Fastigium of vertex wider than the first antennal segments. Tegmen and wing completely absent. Legs not overly long, always under 30 mm. Posterior femur with 5–6 internal and 3–4 outer ventral spines. Anterior and middle tibiae posteriorly more or less flattened dorsally, with four to six ventral movable spurs on each side. Abdomen of male with ninth tergite produced or hood-like ( Fig. 1D ), with shallow median depression near posterior margin ( Fig. 1E ). Male subgenital plate with clearly developed styli ( Fig. 1E ). Female ovipositor not excessively long, under 30 mm; at the upper edge not serrated, apex acuminate or obtuse ( Fig. 1F ).

Other congeneric specimens examined (images): Eremus decolyi Bolívar, 1900 syntype, MNHN; Eremus elegantulus Bolívar, 1900 syntype, MNHN; Eremus rugosifrons oberthuri (Griffini, 1913) syntype, MNHN.

Figures

FIGURE 1. Eremus basalis (Walker, 1869): head and pronotum in dorso-lateral view (A); head and pronotum in lateral view (B); face in anterior view (C); male abdominal apex in lateral (D) and ventral (E) views; female subgenital plate in ventral view (F); and female abdominal apex in lateral view (G). Scale bars: 5 mm (A, B); 2 mm (C–G).