Pteranabropsis bavi, Ingrisch, 2019

Ingrisch, Sigfrid, 2019, Review of the genus Pteranabropsis (Anostostomatidae: Anabropsinae) with description of six new species, Journal of Orthoptera Research 28 (2), pp. 107-124 : 111

Pteranabropsis bavi sp. nov. Figs 1G , 2K , 4N , 5G

Holotype (female). -

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, ISNB).

Other specimens examined. -

Same data as holotype, 1 female (paratype) (Brussels, ISNB) .

Diagnosis. -

A brachypterous species with wings reaching or slightly surpassing hind knees. The new species differs from all other species of the genus described so far by the shape of the female subgenital plate that has a distinct constriction of both lateral margins at the transition from the wider basal to the narrow apical area while in other species there is either a smooth transition or a faint slope of the surface or there are minute lateral grooves as in P. copia sp. nov. or P. carnarius . In general, habitus and wing shapes of P. bavi sp. nov. resemble P. cuspis sp. nov. and P. angusta sp. nov., both only known from males, while P. bavi sp. nov. is only known from females. From P. angusta it differs by the longer and thinner cylindrical apical area of the metasternal lobes, and from P. cuspis sp. nov. by wider tegmina and less reduced hind wings. Both other species occur in areas close to each other but remote from the locality of P. bavi .

Description. -

Medium to large sized species; habitus as genus. Prosternal lobes near base compressed, afterwards long spiniform, thin; mesosternal lobes in basal area moderately wide, afterwards elongate conical to nearly cylindrical with obtuse to subtruncate tip; metasternal lobes compressed, with concave internal and convex external margins; gradually passing over into conical, nearly sub-cylindrical, apical area with obtuse tip (Fig. 2K ).

Wings not or just reaching hind knees (Fig. 1G ). Fore wings 2.6 × longer than wide. Venation: radius with radius sector arising between middle and apical third of tegmen; media two-branched, branching before mid-length; cubitus anterior three-branched, branching before and behind mid-length (on left, folded tegmen, all three veins branching from a single point before mid-length); cubitus posterior undivided; with 5 anal veins, the last one incomplete. Hind wings cycloid, about 1.7 × wider than long.

Legs. Fore coxa with a strong spine at swollen anterior surface; and mid coxa with a smaller spine at anterior margin. Fore femur with 1-3 small spines and mid femur with 3 spines at anterior-ventral margins. Hind femora with 1-5 external and 2-4 internal small spines on ventral margins; hind tibiae with dorsal spines on inner margin larger than on outer margin, ventral margins with few minute spinules; on both sides with 4 apical spurs, the dorsal two pairs very large, the following pair medium, the ventral-most pair small; internal spurs larger than corresponding external counterparts; ventral margin with 2 external and 1 internal spinules.

Male unknown.

Female. Subgenital plate acute-angled triangular in more than basal half, followed by a long spiniform posterior area; lateral margins distinctly constricted at transition between basal and apical areas (Fig. 5G ).

Coloration. -

Brown with lighter spots, fore and mid femora nearly black, all femora with ivory colored knees; hind femur to a variable extent with dorsal surface light ochre. Head: face blackish-brown with whitish-brown dots and flecks; clypeus, labrum and inner area of mandibles light brown with dark flecks to almost fully black; area around medial and lateral ocelli white, ocelli themselves brown; also anterior dorsal part of fastigium verticis white but midline black; antennae yellowish, only scapus and clypeus black. Tegmen semi-transparent brown with dark spots, in anterior area lighter; hind wings semi-transparent grey, in anterior area brownish.

Measurements. -

(2 females). In mm. Body w/wings: 48-50; body w/o wings: 33-37; pronotum: 10.5-11.5; tegmen: 35-37; tegmen width: 13.5; hind femur: 35; antenna: 80; ovipositor: 21.5.

Etymology. -

The name of the new species refers to the type locality; noun in apposition.

Figures

Fig. 1. Habitus dorsal view of Pteranabropsis species. A. P. carli (Griffini, 1911) female; B. P. cuspis sp. nov. male; C-E. P. copia sp. nov. male (C), female from Copia (D), and female from Hoang Lien (E); F. P. angusta sp. nov. male; G. P. bavi sp. nov. female; H. P. guadun sp. nov. female; I. P. pusilla sp. nov. male; J. P. carnarius Gorochov, 1998 male. Scales 10 mm.

Fig. 2. A-G. Male subgenital plate; H. Thoracic sternites; I-P. Metasternum of Pteranabropsis species: P. carli (Griffini, 1911) (A, J); P. cuspis sp. nov. (B, H); P. copia from type locality (C, M); P. angusta sp. nov. (D, L); P. carnarius Gorochov, 1998 (E, N); P. pusilla sp. nov. (F, O); P. guadun sp. nov. (G, P); P. copia from Hoang Lien (I); P. bavi sp. nov. (K). Abbreviations: c 1 - fore coxa, c 2 - mid coxa, c 3 - hind coxa, s 1 - prosternum, s 2 - mesosternum, s 3 - metasternum, th - throat with lateral hemispherical sclerites and pair of papillae, pr - underside of pronotum. Scales 1 mm.

Fig. 4. A-K. Male paraproctal outgrowths in full or only apical area in lateral (A-B, E-F, H, J), apical (C-D, G), ventro-apical (I), and oblique apical view (K); L-O. Female abdominal apex with ovipositor in lateral view. A-D. P. copia (2 males); E-G. P. carnarius Gorochov, 1998 (two males from Tam Dao, in F the hindmost outgrowth is twisted upside down); H-I. P. pusilla sp. nov.; J-K. P. guadun sp. nov.; L-M. P. copia sp. nov. from Copia (L) and Hoang Lien (M); N. P. bavi sp. nov.; O. P. guadun sp. nov. Scales 1 mm, scale for ovipositor 10 mm.

Fig. 5. Female subgenital plate of A-C. P. carli (Griffini, 1911) from Hoang Lien (A-B) and Tam Dao (C, in oblique view); D-F. P. copia sp. nov. from Hoang Lien (D-E) and Copia (F); G. P. bavi sp. nov.; H. P. pusilla sp. nov.; I. P. guadun sp. nov.; J-K. P. carnarius Gorochov, 1998 from Tam Dao (J) and from BaVi (K, abdomen laterally compressed). The white arrows point at the small lateral grooves, constrictions or faint steps of the subgenital plates. Scales 1 mm.