Xanthogryllacris punctipennis aurantiaca (Brunner von Wattenwyl, 1888 )

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 : 93

Xanthogryllacris punctipennis aurantiaca (Brunner von Wattenwyl, 1888) stat. reest.

Figs. 29 A–B, 30A–C

Material examined. Lectotype (male), here designated: Indonesia: Maluku, Ambon: Amboina, 1859, leg. Dr. Doleschal—(Wien NHMW).

Discussion. This taxon is certainly a valid species or subspecies not a synonym of X. punctipennis Walker ; but as one male and the females described by Brunner did not come from the same locality, a lectotype selection becomes necessary. The male from Ambon in the Brunner collection in NHMW is selected here as lectotype.

Description. Medium sized species. Head: Face ovoid with fine transverse riffles and scattered impressed dots; fastigium verticis about as wide as scapus; ocelli distinct; fastigium frontis separated from fastigium verticis by a fine transverse suture; subocular furrows only indicated ( Fig. 29B ).

Wings surpassing hind knees ( Fig. 29A ). Tegmen: Radius releases RS in or little before middle, both veins forked near tip. Media anterior fused in about basal third with radius; media posterior absent; cubitus anterior forks into CuA1 and CuA2 before half-length of tegmen; cubitus posterior undivided, free throughout; with 4 anal veins, last two with common stem.

Legs: Fore and mid tibiae with four pairs of long ventral spines and one pair of smaller ventral spurs; hind femur with 7 external and 2–3 internal black spines on ventral margins; hind tibia with spaced spines on both dorsal margins, both ventral margins with one pre-apical spine; with 3 apical spurs on both sides.

Coloration. General color brown; pronotum with indistinct pattern. Face red brown; ocelli yellow; clypeus and labrum yellow mixed with brown. Tegmen semi-transparent yellow; veins darker; hind wing bright yellow, cross veins (except in anterior area) bordered on both sides with brown bands; each pair of bands ovoid, getting narrower towards margin.

Male. Eighth abdominal tergite prolonged but otherwise unmodified. Ninth abdominal tergite globular, largely vertical with a pair of large ovoid and projecting swellings above apical margin, furrowed in between; each swelling at ventral margin with a compressed black tooth with subacute tip, pointing medio-apicad ( Figs. 30 B–C). Subgenital plate in basal area with convex, in apical area concave lateral margins; apical margin slightly bilobate; styli inserted at the concave part of the lateral margin, rather thin, surpassing apical margin of subgenital plate ( Fig. 30A ).

Female. It is uncertain if the female described by Brunner (1888) from New Britain really belongs to the same species as the male lectotype from Ambon despite superficial similarity. It is thus not included in the description.

Measurements partly from Brunner 1888 male lectotype: body 28; pronotum 6.5; tegmen 27; tegmen width 9.7; hind femur 16 mm.

Figures

FIGURE 29. Genus Xanthogryllacris: A–B, X. punctipennis aurantiaca (Brunner, 1888) male lectotype; C–E, X. lineata sp. nov. female holotype; F–H, X. punctata sp. nov. male holotype.—Habitus dorsal view (A, D, F), habitus lateral view (C), face (B, E, G), stridulatory pegs on second and third abdominal tergites, front is right (H). Scales 10 mm.

FIGURE 30. Genus Xanthogryllacris: A–C, X. punctipennis aurantiaca (Brunner, 1888) male lectotype; D–F, X. punctata sp. nov. holotype; G–H, X. inquinata (Karny, 1928) comb. nov. holotype; I–J, X. lineata sp. nov. holotype.—Male abdominal apex in ventral (A, E) and apical view (B, D, G), apical teeth of ninth abdominal tergite in higher magnification (C, F, H); female end of abdomen with seventh sternite, subgenital plate and base of ovipositor in ventral view conserved in alcohol (H) and after desiccation (I).