Woznessenskia bavi, 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 : 251-252

Woznessenskia bavi sp. nov.

Figs. 1F , 90 D–I, 91C–G

Material examined. Holotype (male): Vietnam: 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).

Other specimens studied: same data as holotype: 1 female (paratype)—(Brussels RBINS).

Diagnosis. W. bavi sp. nov. is similar to W. finitima Gorochov, 2002 although little larger. The male differs from the latter by the projections of the tenth abdominal tergite being longer, less strongly curved and not so strongly bent at base, the tip of that projection is narrower but has a similar number of denticles ( Fig. 91D, F ). The hook-shaped appendages of the ninth tergite are light yellow except for the black tip instead of mostly black and have the tip simply curved up ( Fig. 91C ) not the very tip curved down or nearly so as in W. finitima . The female has the posterior half of the seventh abdominal sternite largely membranous ( Fig. 91G ) thus there is no subapical constriction as in W. finitima . The color pattern of head and pronotum also differ in details between both species, but more striking is the black and white striped abdomen in W. bavi while it is fully black in W. finitima . The female differs by the shape of the seventh abdominal sternite that does not divide at tip but the widening is only indicated by color pattern and the apical margin is subtruncate not roundly excised. In contrast the subgenital plate has a distinct, elevated and sclerotised apical margin not a simple flap as in W. finitima . The ovipositor is distinctly longer (shape not given for W. finitima ), 17 against 12 mm, and of characteristic shape: wide and substraight in mid-length and curved only in subbasal area and apical third. Finally W. bavi is larger than W. finitima . From W. ampliata sp. nov., W. bavi differs by the in middle substraight instead of regularly curved ovipositor, the hardly bulging apical margin of the seventh abdominal sternite and a different outline of the female subgenital plate.

Description. Large to medium sized species. Head: Face narrow ovoid, nearly smooth with very fine transverse riffles and impressed dots; fastigium verticis about as wide as scapus; ocelli little distinct; fastigium frontis separated from fastigium verticis by a very fine suture; subocular furrows shallow, widening ventrad ( Figs. 90E, G ). Abdominal tergites two and three each with two rows of stridulatory pegs (6–9, 16–18; 11–16, 21–25; n = 1 male, 1 female; Fig. 90I ).

Wings reaching about tip of stretched hind tibia ( Figs. 90D, F ). Tegmen: Radius with two branches, both forked near tip; media anterior free from base; cubitus anterior at base with a single branch that forks into two veins, the anterior branch makes a curvature and receives an oblique connection vein from MA and shortly after divides again 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 (fourth indistinct), 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 6–9 external and 10–12 internal spines on ventral margins; hind tibia with spaced spines on both dorsal margins, ventral margins with one preapical spine each; with 3 apical spurs on both sides.

Coloration. General color brown; vertex black, in male interrupted by two light bands, posterior area brown. Face light-colored with fastigium verticis, antennal scrobae, base of antennae, and an interrupted band below compound eyes black; antennae including flagellum when pointing anteriorly black, upper side light. Pronotum with margins black and with two elongate black spots behind anterior margin and two black spots behind transverse furrow, in female connected by dark diffusion; abdominal tergites partly black, black portion increases from anterior to posterior tergites and from lateral to dorsal areas; abdominal sternites yellowish, in female little darkened in lateral areas; legs of general color. Tegmen semi-transparent, along margins whitish, along midline brownish; veins dark brown; hind wing semi-transparent whitish, veins dark brown.

Male. Ninth abdominal tergite globular but not much down-curved apically; apical margin in middle roundly projecting, on both sides concave; lateral areas with a fold about above bases of cerci, just beside of the fold a strong hook-shaped process with recurved apex rising ( Fig. 91C ). Tenth abdominal tergite from middle with a pair of long and little curved projections with compressed disc-shaped and serrate apex ( Fig. 91D, F ). Paraprocts with rounded apex and medial furrow. Subgenital plate with convex latero-apical margins seamlessly passing over to a slightly bilobate apical margin; rather small styli inserted apico-laterally ( Fig. 91E ). Phallus membranous.

Female. Seventh abdominal sternite longer than preceding sternites, lateral and apical areas membranous as indicated by transverse riffles, with dark brown lateral bands extended before apex laterad; apical margin little stiffened and with narrow rim, convex on both sides, concave in middle. Subgenital plate roughly semi-circular but for greatest part membranous with numerous transverse riffles; apical margin little bulging and sclerotised, interrupted in middle by a furrow ( Fig. 91G ). Ovipositor elongate, little curved in subbasal and apical areas, in middle nearly straight and wide, in apical third narrowing towards narrow subacute tip ( Fig. 90H ).

Measurements (1 male, 1 female).—body w/wings: male 51, female 52; body w/o wings: male 25, female 30; pronotum: male 6.5, female 6; tegmen: male 44, female 43; tegmen width: male 13.2, female 13; hind femur: male 19, female 19; antenna: male 110; ovipositor: female 17 mm.

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

Figures

FIGURE 1. A, Larnaca (L.) eugenii (Griffini, 1914); B, Eugryllacris trabicauda sp. nov.; C, Ocellarnaca braueri (Griffini, 1911); D, Gryllacris kinabaluensis Griffini, 1915; E, Ultragryllacris triangula sp. nov.; F, Woznessenskia bavi sp. nov.; G, Psilogryllacris sp. (Karny's 1931 "allotype" of "dalbertisi Griffini 1909"); H, Zalarnaca (Zalarnaca) maninjau sp. nov.—Left tegmen with main veins (A–G), apical area of right hind tibia and hind tarsus in oblique lateral view with ventral pre-apical spine marked (H). Abbreviations for veins: C costa, ScA subcosta anterior, ScP subcosta posterior, R radius, RS radius sector, MA media anterior, MP media posterior, CuA cubitus anterior, CuP cubitus posterior, An1 first anal vein, following anal veins unmarked.

FIGURE 90. Genus Woznessenskia: A–C, W. ampliata sp. nov. female holotype; D–I, W. bavi sp. nov. male holotype (D–E), female paratype (F–I); J–K, W. finitima Gorochov, 2002 male.—Habitus dorsal view (A, D, F, J), face (B, E, G, K), stridulatory pegs on second and third abdominal tergites, front is right (I), ovipositor (C, H). Scales 10 mm (habitus, ovipositor), 1 mm (face).

FIGURE 91. Genus Woznessenskia: A–B, W. finitima Gorochov, 2002; C–G, W. bavi sp. nov. male holotype (C–F), female paratype (G); H, W. ampliata sp. nov. female holotype.—Male abdominal apex in apical (A, C), lateral (B, F), and ventral view (E), projections of tenth abdominal tergite in higher magnification (D); female end of abdomen with seventh sternite, subgenital plate and base of ovipositor in ventral view (G–H).