Siderogryllacris siderea ( Karny, 1925a )

Ingrisch, Sigfrid, 2018, New taxa and records of Gryllacrididae (Orthoptera, Stenopelmatoidea) from South East Asia and New Guinea with a key to the genera, Zootaxa 4510 (1), pp. 1-278 : 243

Siderogryllacris siderea ( Karny, 1925a)

Figs. 87 A–F

Material examined. Philippines: Mindanao , Butuan, leg. Baker— 1 male (type) (Wien NHMW) .

Description. Small species. Head: Face wide ovoid, matt; with fine transverse riffles; fastigium verticis wider than scapus, indistinctly separated from fastigium frontis; ocelli distinct; subocular furrow indistinct ( Fig. 87C ).

Wings covering about body and slightly surpassing hind knees ( Fig. 87A ). Tegmen rather strongly sclerotised; costal area strongly reduced to a short but distinctly projecting flap at base of tegmen; for the remainder the anterior branch of the subcosta makes the fore margin of the tegmen; radius releases RS in apical half of tegmen, only RS forking once in apical area. On left tegmen media and cubitus with common base, dividing near end of basal third, with seven anal veins, the last shortened; on right tegmen media and cubitus are separate, undivided veins, with six anal veins, the last shortened.

Legs: Hind femur very thick in basal two thirds clubbed ( Fig. 87B ).

Coloration. General color largely black with yellowish sternites, abdomen and legs. Face in middle maroon, towards vertex, genae and clypeus margin blackish; ocelli yellow; from mid-clypeus downwards medium brown to yellowish. Tegmen corneous; blackish brown, towards tip yellowish brown; hind wing semi-transparent dark brown with white oval spots around some of the cross veins; main veins blackish brown.

Male. Ninth abdominal tergite rather short, globular; ventral hind margin slightly concave on both sides; hind margin in dorsal area slightly depressed in dorsal area, in ventral area distinctly convex, step-like projecting between depressed dorsal and convex lateral areas; ventral margin convex in middle; area below ventral margin largely hidden by prolonged subgenital plate as already mentioned by Karny (1925a), probably with a pair of short blunt projections, but uncertain ( Fig. 87F ). Subgenital plate wide at base, then narrowing at lateral insertion of styli, and with a long setose oval projection that is longer than the wide basal area, proximal part of projection with medial furrow and swollen on both sides, distal part of projection simple with upcurved margins; styli reaching to about end of furrowed part of projection ( Figs. 87 D–E).

Female unknown.

Measurements from Karny (1925a) (1 male).—body w/o wings: 16.5; pronotum: 4.7; tegmen: 12.3; hind femur: male 8; ninth tergite 1.7 mm.

Figures

FIGURE 87. Siderogryllacris siderea (Karny, 1925) male: Habitus dorsal view (A), habitus lateral view (B), face (C), male abdominal apex in ventral view (D), abdomen and hind femora in ventral view (E), ninth abdominal tergite and subgenital plate in apical view (F).