Furcilarnaca chiangdao, 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 : 182

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

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scientific name

Furcilarnaca chiangdao

sp. nov.

Furcilarnaca chiangdao View in CoL sp. nov.

Figs. 63 View FIGURE 63 I–K, 65E–G

Material examined. Holotype (female): Thailand: Chiang Mai, Doi Chiang Dao trekking, (19°20'N, 98°45'E), 4– 7.vi.1986, leg. S. Ingrisch—(Bonn ZFMK). GoogleMaps

Diagnosis. The new species is unique for the shape of the female seventh abdominal sternite possessing an anteriorly open lobe that overlaps the anterior surface of the sternite ( Figs. 65 View FIGURE 65 F–G). With regard to the shortened wings and the shape of the female subgenital plate F. chiangdao is similar to F. brachyptera Li et al. (2015) from Yunnan, but differs apart from the seventh sternite by the sclerotised baso-lateral angles of the subgenital plate. The shape of the female subgenital plate is also similar to those of F. huangi Gorochov, 2004 from Yunnan and another unnamed species figured in the same paper. The new species differs apart from the brachypterous wing condition by the absence of a pair sclerites embedded in the seventh sternite, instead this sternite has an anterior fold of the surface.

Description. Small species ( Fig. 63I View FIGURE 63 ). Head: Face not particularly large; in frontal view roughly oval; forehead nearly smooth; fastigium verticis little wider than scapus; medium and lateral ocelli small long-oval, whitish yellow ( Fig. 63J View FIGURE 63 ). Abdominal tergites two and three each with two rows of stridulatory pegs (11–13, 17–20; 20, 25–25; Fig. 63K View FIGURE 63 ).

Wings covering about half of abdomen ( Fig. 63I View FIGURE 63 ). Tegmen: Radius divides into R and RS shortly before tip, afterwards both veins unbranched; media anterior only at very basal area fused or sub-fused with R, then free and undivided but meets in a point with CuA1; cubitus anterior at base with a single branch that forks into two veins at about end of basal third, shortly after the anterior branch meets in a point with MA but afterwards remains undivided as MP+CuA1; the posterior branch CuA2 also undivided; cubitus posterior undivided, free throughout; with 3 anal veins plus an incomplete fourth vein arising from third.

Legs: Fore coxa with small 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 6–7 external and 6–8 internal spines on ventral margins, little increasing in size towards posterior end; hind tibia with rather few spines on both dorsal margins; ventral margins with one pre-apical spine each; with 3 apical spurs on both sides.

Coloration. General color dirty yellowish brown; eyes black. Face yellowish brown. Tegmen transparent, only towards tip little smoky with black veins; hind wing transparent.

Male unknown.

Female. Seventh abdominal sternite fully membranous without distinct border to intersegmental membrane, surface with rough transverse striation; from end of basal third anteriorly the posterior area of the surface forming a free roundish lobe that overlaps the surface of the anterior area that has a fine transverse striation, at the tip of that lobe there is a small knob-like projection on ventral surface ( Figs. 65 View FIGURE 65 F–G). Subgenital plate fully membranous except for baso-lateral angles; apical area forming two obtuse angular lobes, triangularly excised in between. Ovipositor straight, very faintly curved ventrad; hardly longer than hind femur; tip narrowly obtuse ( Fig. 65E View FIGURE 65 ).

Measurements (1 female).—body w/wings: 18; body w/o wings: 18; pronotum: 3; tegmen: 8.5; hind femur: 9; ovipositor: female 9.5 mm.

Etymology. Named after the type locality, noun in apposition.


Zoologisches Forschungsmuseum Alexander Koenig

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