Otidiogryllacris lawang, 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 : 80-82

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https://doi.org/ 10.11646/zootaxa.4510.1.1

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scientific name

Otidiogryllacris lawang

sp. nov.

Otidiogryllacris lawang View in CoL sp. nov.

Figs. 25 View FIGURE 25 F–J

Material examined. Holotype (male): Indonesia: West Sumatra, Maninjau—Puncak Lawang , elev. 600–950 m (0°17'S, 100°15'E), 17.iii.1995, leg. S. Ingrisch— 1 female (Bonn ZFMK). GoogleMaps

Diagnosis. The new species is conspicuous for the transverse black band along ventral margin of fastigium verticis which is interrupted in middle and continued at both sides on scapus ( Fig. 25H View FIGURE 25 ). It is similar to O. willemsei ( Karny, 1924b) but differs by somewhat larger size and longer ovipositor, but more significantly by the subgenital plate that has approaching lateral margins and a subtruncate hind margin instead of being semi-circular with wide angularly excised hind margin with rounded lobes. From O. auriculata it also differs by the shape of the subgenital plate.

Description. Small species. Head: Face ovoid ( Fig. 25H View FIGURE 25 ); forehead nearly smooth; fastigium verticis little wider than scapus, separated by a transverse suture from fastigium frontis; ocelli distinct, whitish. Abdominal tergites two and three without stridulatory pegs.

Wings reaching to about hind knees ( Fig. 25F View FIGURE 25 ). Tegmen: Radius with two branches: only RP forked once more near tip; media anterior has a common stem with radius, arising as first posterior branch of R in basal half of tegmen; media posterior absent; cubitus anterior undivided; cubitus posterior undivided, free throughout; with 5 Anal veins, the last one incomplete and with a common base with preceding vein.

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 7–10 external and 3–7 internal spines on ventral margins; hind tibia with spaced spines on both dorsal margins, ventral margins with one pre-apical spine; with 3 apical spurs on both sides.

Coloration. General color rather uniformly brown, pronotum with indistinctly darkened anterior area and with an elongate dark spot in middle of transient zone between disc and lateral lobes; tibiae of all legs with an indistinct dark spot about in mid-length. Face yellowish brown with a sinuate dark brown band from base of scapus and below lateral ocelli to base of scapus. Tegmen semi-transparent yellow, veins little darker; hind wing semitransparent white; veins yellow to brown.

Male unknown.

Female. Seventh abdominal sternite distinctly shorter than preceding sternites, followed by a long membranous zone ( Figs. 25 View FIGURE 25 I–J). Subgenital plate largely membranous, only lateral and apical areas sclerotised, apical area flattened; apical margin very faintly bilobate almost truncate in middle ( Fig. 25I View FIGURE 25 ). Ovipositor falcate, strongly upcurved especially in subbasal area; laterally furrowed, margins gradually approaching towards apex; the median valves of the ovipositor are laterally distinctly projecting at base between the dorsal and ventral valves; apical area slightly thickened but not widened, tip subobtuse ( Fig. 25G View FIGURE 25 ).

Measurements (1 female).—body w/wings: 21; body w/o wings: 18; pronotum: 4.2; tegmen: 13.5; tegmen width: 5; hind femur: 11; antenna: 60; ovipositor: 8 mm.

Etymology. The new species is named after the type locality; noun in apposition.


Zoologisches Forschungsmuseum Alexander Koenig

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