Capnogryllacris (C.) nigromaculata 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 : 147

Capnogryllacris (C.) nigromaculata sp. nov.

Figs. 46E , 48F , 49 I–K

Material examined. Holotype male: Vietnam: Prov. Vinhfu, Tam Dao N.P., (21°31'N, 105°33'E), 25–30.vii.2011, leg. J. Constant & J. Bresseel (I.G. 31.933)—(Brussels RBINS).

Other specimens studied: same data as holotype— 2 males (paratypes) (Brussels RBINS).

Diagnosis. The new species is so far unique within the genus for dentate hind margins of the projections of the male ninth abdominal tergite. These projections are also distinctly longer and have the apical area curved lateroproximad, which differentiates them from species in which the projections have a similar basic shape as C. funebris ( Brunner, 1898) , C. proxima Gorochov, 2003 , C. phaeocephala Gorochov, 2003 or C. elongata Li et al., 2014 [homonym]. The very short subgenital plate that is subdivided in midline by a deep furrow in combination with stout and for about 90° upcurved styli is another distinctive feature of the new species. Although strongly upcurved styli also occur in other species of the genus as C. borneoensis ( Haan, 1842) , C. fumigata ( Haan, 1842) , or C. funebris ( Brunner, 1898) , they are combined with differently shaped subgenital plates and different projections of ninth tergite. The venation of tegmen with both media veins arise from a long common stem while both cubitus veins are free and undivided over the whole length is also an interesting feature of the specimens studied, but this may proof to be variable when more specimens become studied.

Description. Medium large species. Head: Face ovoid; forehead in middle with fine riffles, laterally nearly smooth; fastigium verticis wider than scapus; ocelli little distinct; fastigium frontis separated from fastigium verticis by a very fine suture; subocular furrows shallow ( Fig. 48F ). Abdominal tergites two and three with without stridulatory pegs.

Wings surpassing hind knees and nearly reaching mid of stretched hind tibia ( Fig. 46E ). Tegmen: Radius with two branches, both forked near tip; media anterior arises free from base, later divides into MA and MP; both, cubitus anterior and 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 (right mid tibia in holotype obviously a regrind being shorter and with only 3 pairs of ventral spines); hind femur with about 7–11 external and about 12–13 internal spines on ventral margins; hind tibia with spaced spines on both dorsal margins, ventral margins with one preapical spine; with 3 apical spurs on both sides.

Coloration. General color light brown with extended black pattern; vertex black, pronotum black except for a brown transverse band in middle of disc; legs brown with genicular areas of all legs and fore and hind tarsi black, fore tibia laterally black, hind tibia with large black spots, mid tarsi with apical segments black. Face central area yellow; fastigium verticis with a black spot; antennal scrobae and area ventro-mediad of it black; lateral areas of face, genae, mandibles and labrum black; maxillary palpi yellow brown. Tegmen semi-transparent yellowish, towards base darker; veins yellow to dark brown; hind wing semi-transparent white, main veins yellow or brown, cross veins dark brown to black.

Male. Eighth abdominal tergite little prolonged. Ninth abdominal tergite rather short, little projecting behind eighth tergite; furrowed in midline and provided on both sides with a large obtuse swelling that terminates on ventro-internal angle into a large compressed sickle-shaped process with serrate apical margin ( Figs. 49 I–K). Subgenital plate wider than long with a deep medial furrow dividing it into two apically diverging roughly rectangular halves; apical margin wide roundly excised in middle; styli stout, upcurved for about 90°, inserted on apical margin nearly in middle between lateral margin and furrow.

Female unknown.

Measurements (3 males).—body w/wings: 46–50; body w/o wings: 34–39; pronotum: 8.0–8.5; tegmen: 34–36; tegmen width: 14.5; hind femur: 22–23; antenna: 140 mm.

Etymology. The name of the new species refers to the large black spots on the hind tibiae; from Latin niger (black) and macula (fleck).

Figures

FIGURE 46. Genus Capnogryllacris, Habitus dorsal view: A, C. varifrons sp. nov. male paratype; B, C. e. fuscifrons ssp. nov. holotype; C–D, C. humberti (Griffini, 1914) female (C) and male (D); E, C. nigromaculata sp. nov. male holotype; F, C. e. erythrocephala Gorochov, 2003 male; G, C. e. borealis Gorochov, 2003 female; H, C. proxima Gorochov, 2003 male; I, C. varifrons sp. nov. female paratype.—Scales 10 mm.

FIGURE 48. Genus Capnogryllacris: A–C, C. varifrons sp. nov.; D, C. e. fuscifrons ssp. nov.; E, C. humberti (Griffini, 1914); F, C. nigromaculata sp. nov.; G, C. p. phaeocephala Gorochov, 2003; H, C. e. erythrocephala Gorochov, 2003; I, C. e. borealis Gorochov, 2003; J, C. s. sakaerat Dawwrueng et al., 2015; K, C. elongata (Fritze, 1908); L, C. f. fasciculata (Pictet & Sauss., 1891); M, C. proxima Gorochov, 2003; N, C. s. toxica ssp. nov.; O, C. khmerica Gor.—Face female (A, E, G, I, J, N, O) and male (B–D, F, H, K–M); not to scale.

FIGURE 49. Genus Capnogryllacris: A–B, C. varifrons sp. nov.; C, C. e. fuscifrons ssp. nov.; D, C. e. erythrocephala Gorochov, 2003; E–F, C. humberti (Griffini, 1914); G–H, C. proxima Gorochov, 2003; I–K, C. nigromaculata sp. nov.—Male abdominal apex in apical or ventro-apical view to show projections of ninth abdominal tergite (in A, D, E, G, and K also subgenital plate).