Gryllacris (Gryllacris) bancana Karny, 1930a, 2018

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 : 46

publication ID 10.11646/zootaxa.4510.1.1

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Gryllacris (Gryllacris) bancana Karny, 1930a

stat. nov.

Gryllacris (Gryllacris) bancana Karny, 1930a View in CoL stat. nov.

Figs. 10C View FIGURE 10 , 12H View FIGURE 12 , 13 View FIGURE 13 G–I

Gryllacris obscura bancana Karny, 1930a View in CoL

Material examined. Indonesia: Sumatra, Sumatera Selatan, Palembang , (2°59'S, 104°45'E), 1902, leg. Dr. A. Fuchs— 1 male (Museum Wiesbaden) GoogleMaps .

Discussion. This taxon was so far only known from the holotype, a male from Banka Island [Pulau Bangka]. Thus not far from Palembang. G. bancana differs from G. obscura by the narrow shape of the ninth abdominal tergite and its apical projection that is in about mid-length divided by a transverse furrow, which is concave in middle and on both sides provided with a semicircular compressed projecting lobe, while the apical area is deeply furrowed in midline and little bent proximad. Males of G. obscura that I have seen so far either do not have a transverse fold in mid-length of the projection of the ninth abdominal tergite or have a weak fold without any projecting lobes and the apical area is not or only weakly furrowed. Those differences of the ninth male abdominal tergite validate a separate full species status.

Description. Large species. Head: Face large, ovoid; forehead nearly smooth; fastigium verticis hardly wider than scapus; ocelli indistinct ( Fig. 12H View FIGURE 12 ). Abdominal tergites two and three each with two rows of very small stridulatory pegs.

Wings surpassing hind knees and reaching about middle of hind tibia ( Fig. 10C View FIGURE 10 ). Tegmen: Radius with two branches, both forked near tip; media anterior fused in basal area with radius; media posterior absent; cubitus anterior forks between basal third and mid-length into two veins, CuA1 and CuA2; cubitus posterior undivided, free throughout; with 4 anal veins.

Legs: Fore coxa with a spine at fore margin; fore and mid femora unarmed; fore and mid tibiae with four pairs of large ventral spines and one pair of smaller ventral spurs; hind femur with 7–9 external and 9–10 internal spines on ventral margins; hind tibia with spaced spines on both dorsal margins, ventral margins with one pre-apical spine each; with 3 apical spurs on both sides.

Coloration. General color light brown (originally conserved in alcohol); disc of pronotum with hieroglyphic black figure; anterior and posterior margins narrow black. Vertex with a round black spot in middle and black bands on both sides. Legs light brown; genicular areas little darkened; anterior and lateral surfaces of fore tibia dark brown. Face yellowish brown with small black spots at lateral ends of clypeo-frontal suture, fastigium verticis with a large dark spot; antennal scrobae dark brown; scapus in part indistinctly infumate; tip of mandibles black. Tegmen yellowish transparent, veins hardly darker; hind wing transparent with dark bands along veins and veinlets.

Male. Eighth abdominal tergite strongly prolonged behind. Ninth abdominal tergite (type F in Brunner 1888) wide at base; dorsal apical margin prolonged into a short and narrow, setose projection with bifid tip; lateral area curved down, with both sides closing below the projection and forming in middle a stout elevation little widening towards tip and with subtruncate apex, in midline with a slight furrow; lateral areas of ninth tergite blackish brown, projection and central elevation pale ( Figs. 13 View FIGURE 13 G–I). Subgenital plate wider than long with lateral margins convex and little upcurved; apical margin slightly bilobate; styli stout and long, inserted in about two thirds of plate length.

Female unknown.

Measurements (1 male).—body w/wings: 50; body w/o wings: 31; pronotum: 7.5; tegmen: 39; tegmen width: 12; hind femur: 22; antenna: 140 mm.














Gryllacris (Gryllacris) bancana Karny, 1930a

Ingrisch, Sigfrid 2018

Gryllacris obscura bancana

Karny 1930
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