Diaphanogryllacris recta, 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 : 171-172

publication ID

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

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scientific name

Diaphanogryllacris recta

sp. nov.

Diaphanogryllacris recta View in CoL sp. nov.

Figs. 53D, 53H View FIGURE 53 , 55F, 55I View FIGURE 55 ,, 56 View FIGURE 56 J–L, 58G, 59J–K, 59M–N

Material examined. Holotype (male): Hanoi prov., BaVi N.P., (21°4'4''N, 105°21'30''E), 25–29.vi.2015, leg. J. Constant & J. Bresseel (I.G.: 33.092)—(Brussels RBINS). GoogleMaps

Other specimens studied: Vietnam: same data as holotype— 2 females, 4 males (paratypes) (Brussels RBINS); VinhPhuc prov. , MeLinh B.S., (21°23'38''N, 105°42'56''E), 30.vi.–1.vii.2015, leg. J. Constant & J. Bresseel (I.G.: 33.092)— 1 female, 1 male (Brussels RBINS) GoogleMaps ; ChamChu N. R., (22°12'N, 105°6'0''E), 8–12.vii.2015, leg. J. Constant & J. Bresseel (I.G.: 33.092)— 1 female (Brussels RBINS) GoogleMaps .

Remark. A single female from ChamChu was collected freshly moulted and has the subgenital plate distorted. It is included with doubt in this species.

Diagnosis. The male abdominal apex of the new species is similar to that of D. panfilovi Gorochov & Woznessenskij, 1999 and D. annamita (Griffini, 1909) . It differs from D. annamita by the projections of the ninth abdominal tergite being wider at base, about triangular not nearly parallel-sided, and the apical parts are distinctly compressed and in apical view slightly curved not straight; the projections of the tenth tergite are not stout at base as in D. annamita but of nearly equal width from base and only at tip laterally compressed. From the situation in D. panfilovi , D. recta differs by the projections of the ninth tergite being twisted from the transition between the broad basal to the narrow apical part and the apical part is curved in basal and apical area, not straight, the projections of the tenth tergite are longer and narrower. The female of D. recta has the seventh abdominal sternite fully membranous as in D. annamita , but the short membranous process lies in about the middle not at end of the membranous area. The female subgenital plates of both taxa are very similar. D. panfilovi is only known from the male.

Description. Medium sized species. Head: Face oval; nearly smooth or with very fine transverse riffles in middle; fastigium verticis wider than scapus; ocelli present; fastigium frontis separated from fastigium verticis by a very fine suture; subocular furrows shallow ( Fig. 55F View FIGURE 55 ). Abdominal tergites two and three each with two rows of stridulatory pegs (6–7, 9–12; 12, 16–17; n = 1 male, 1 female).

Wings little surpassing middle of stretched hind tibia ( Fig. 53H View FIGURE 53 ). Tegmen: Radius with two branches, both forked near tip; media anterior free, in subbasal area closely approached to radius; cubitus anterior at base with a single branch that forks into two veins, the anterior branch makes a curvature, receives a connection branch from MA (in female very distinct), shortly after it divides into two parallel branches, MP and CuA1, while the posterior branch (CuA2) does not divide further; cubitus posterior undivided, free throughout; with 4 anal veins, last two with common stem.

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 6–8 external and 7–10 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 light brown; vertex brown with black spot behind compound eyes and on fastigium verticis; pronotum black, ventro-anterior angles, hind margin and some scattered small spots light brown; legs of general color with genicular area and part of tarsal segments black. Face yellowish brown with black spots on fastigium verticis and at baso-lateral angles of clypeus; tip of mandibles also black. Tegmen semi-transparent white, veins and veinlets brown; towards base darker; hind wing semi-transparent white, veins and veinlets brown.

Male. Eighth abdominal tergite only little prolonged. Ninth abdominal tergite rather short, little globular, apical margin emarginated on both sides, in middle with a narrow projection with truncate tip, emarginated area vertical with membranous surface, at lateral margins of emargination a vaulted plate-shaped process that terminates into a long, narrow, compressed, little curved and acute spine bent ventrad. Tenth abdominal tergite in middle and between projections of ninth tergite with a pair of narrow, upright, acute projections curved faintly proximad and terminating below of an elongate but truncate median process of ninth tergite ( Figs. 56 View FIGURE 56 J–K). Subgenital plate with convex lateral margins, apical margin on both sides oblique with bicornute median process; slightly curved styli little shorter than length of subgenital plate, inserted at oblique areas of apical margin ( Fig. 56L View FIGURE 56 ). Phallus with a narrow elongate but little sinuate sclerite ( Fig. 58G View FIGURE 58 ).

Female. Seventh abdominal sternite fully membranous but at base little stiffened; in center with a large complex membranous elevation containing a transverse fissure at both sides, probably resulting from punctures of the male appendages. Subgenital plate fully membranous; apical area triangular with rounded tip (reversed upside down in preparation) ( Fig. 59J View FIGURE 59 ). Base of ovipositor with long oval gonangulum at base. Ovipositor very long, substraight; only before tip faintly upcurved; tip with narrowed margins, subobtuse ( Fig. 59K View FIGURE 59 ).

Measurements (6 males, 3 females).—body w/wings: male 42–48, female 42–45; body w/o wings: male 27– 34, female 33–40; pronotum: male 5.5–7.0, female 6.5–7.0; tegmen: male 31–37, female 33–35; tegmen width: male 11.0–11.5, female 11.5; hind femur: male 12–19, female 17–19; antenna: male 115–120, female 130; ovipositor: female 29–31 mm.


Royal Belgian Institute of Natural Sciences

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