Xanthogryllacris subrecta, 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 : 95

Xanthogryllacris subrecta sp. nov.

Figs. 31 I–J

Xanthogryllacris punctipennis Karny 1928b partim

Material examined. Holotype (female). Papua New Guinea: East Sepik, Pionierlager (4°19'S, 141°55'E), KAE55, 1.v.–30.vi.1912, leg. Bürgers (Berlin ZMB).

Diagnosis. The female and its wing setting agrees with the photo published in Karny (1928b) except that the right antennae is broken; also the length of the elongate ovipositor agrees with Karny's measurements. However the shape of the subgenital plate has only a vague similarity with the drawing in Karny 1928b fig. 8 p. 104, which may be due to the fact that the tip of the subgenital plate and the tip of the seventh sternite are somewhat upcurved and Karny's drawings were made from a different perspective. The new taxon differs from other subspecies of X. punctipennis occurring in New Guinea and the Bismarck Archipelago as X. p. dempwolffi ( Griffini, 1909b) or X. p. ralum sp. nov. by the rather elongate ovipositor, the apical area of the female subgenital plate that has the apical lobes obtusely rounded instead of acute and the excision in between these lobes also rounded instead of angular, and the apical process of the seventh abdominal sternite bulging and little upcurved instead of elongate and compressed as in X. p. ralum or with bifid tip as in X. p. dempwolffi.

Description. Head, body and legs uniformly light brown. Tegmen light yellowish, subtransparent. Radius releases radius sector in about mid-length; media fused in basal area with radius, separates behind basal quarter, undivided. Cubitus anterior uni-branched till nearly apical quarter, then divides into CuA1 and CuA2; cubitus posterior single branched and free throughout; with four anal veins. Hind wings pale yellow, with oval dark brown marks along and including cross-veins. A more comprehensive description of wing venation can be found in Karny (1928b).

Male unknown.

Female. Seventh abdominal sternite strongly setose, from middle of apical area with a bulging upcurved process covering hollowed central basal area of subgenital plate. Subgenital plate with strongly bulging lateral areas separated by a deep and wide medial furrow, along midline with a narrow central suture at bottom of wide furrow, in basal area deepened; lateral margins in apical half little converging, nearly subparallel, terminating into a pair of rounded apical lobes, roundly excised in between ( Fig. 31I ). Ovipositor elongate, only moderately curved, mainly in subbasal area; with subapical widening ( Fig. 31J ).

Measurements after Karny 1928b (1 female).—body w/o wings: 29.2; pronotum: 6.5; tegmen: 23.5; hind femur: 17.2; ovipositor: female 14.8 mm.

Etymology. Named for the rather elongate shape of the female ovipositor.

Figures

FIGURE 31. Genus Xanthogryllacris: A–C, X. p. ralum sp. nov. male holotype (A–B) and female paratype (C); D–F, X. p. dempwolffi (Griffini, 1909) female holotype (D), female from New Britain (E–F); G–H, X. p. keyica (Karny, 1925) male; I–J, X. p. subrecta sp. nov. female holotype.—Male abdominal apex in apical (A, G) and ventral view (B, H), female seventh abdominal sternite and subgenital plate (C–E, I), female ovipositor (F, J).