Kaindiagraecia bilobata, Ingrisch, 2023

Ingrisch, Sigfrid, 2023, New and little-known genera and species of Agraeciini (Orthoptera: Tettigoniidae: Conocephalinae) from New Guinea, Zootaxa 5249 (2), pp. 190-212 : 204-206

Kaindiagraecia bilobata sp. nov.

Figs. 7–8

Holotype (male): Papua New Guinea: New Guinea (NE), Morobe, Mt. Kaindi, elev. 2300 m (-7.3500, 146.6833), 9.vi.1962, coll. J. Sedlacek — 1 male (Honolulu, BPBM).

Other specimens studied (paratypes): Papua New Guinea: New Guinea (NE), Bulldog Road , elev. 2300–2600 m, 13.–15.viii.1978, coll. J.L. Gressitt — 1 male (Honolulu, BPBM); New Guinea NE, Morobe District, Mt Amingwiwa, elev. 2000–2200 m, 10.iv.1970, coll. J.L. Gressitt — 1 male (Honolulu, BPBM) .

Diagnosis. The new species differs from other species by the shape of the lateral lobes of pronotum in which the ventral-apical margin, behind the ventral lobe, runs down a second time to the level of the first ventral lobe before it runs obliquely up to the dorsal apical margin, thus giving the lateral lobes a bilobate appearance. Apart from the bilobate shape of the pronotum lateral lobes, the new species differs from other species also by the shape of the male cerci that have the internal process rather wide but short and provided two short spines at distal margin, and by the rather simple titillators of the male phallus. The stridulatory file on underside of left tegmen of K. bilobata with 57 rather faint teeth at 1.0 mm is slightly denser than on the file of P. dentata (45 teeth at 1.4 mm) but less dense than in P. smaragdifrons (90 teeth at 1.3 mm).

Description. Face long oval, with indistinct light and dark pattern ( Fig. 7H ). Pronotum elongate, almost fully covering tegmen when at rest, all margin outlined by a distinct rim; anterior margin substraight or very faintly concave, transverse furrows indistinct, little less than apical half step-like elevated against anterior area with convex surface; lateral lobes narrow elongate, just before mid-length with a ventral-lateral lobe followed by a concave notch, which is followed by a second ventral lobe after which the ventral margin runs seamlessly into the dorsal hind margin ( Figs. 7A–D ). Prosternum with two spines of medium length; mesosternal lobes angular, metasternal lobes rounded. Femora with the following number of spines on ventral margins: fore femur 2–4 anterior, 0–1 posterior; mid femur 3–4 anterior, 0 posterior; hind femur 4–5 anterior, 0–4 posterior. Hind knee lobes with one spine on both sides.

Male. Tenth abdominal tergite terminating into a pair of about triangular lobes with obtuse tips, hind margin roundly excised in between, and with a wide, shallow, medial furrow ahead of excision ( Figs 8A, C ). Cerci shortconical, about as long as tenth tergite; behind about basal quarter with a wide and compressed but still stout internal projection running parallel to the surface of the cercus but forming before apical quarter of cercus a little curved internal process that carries on proximal surface an oval groove and at proximal end of internal margin a curved spine; end of rounded distal angle also with a curved spine but approached to the ventral margin thus less clearly visible in dorsal view; ventral angles of process simply rounded ( Fig. 8C–D ). Micropterus, tegmen reduced to stridulatory area and almost fully covered by pronotum when at rest; mirror long oval with anterior margin oblique and straight, anterior of it with a small rectangular cell and laterally of it with a large, elongate, and little curved transparent cell ( Figs 7F–G ). Stridulatory file total length 1.0 mm with 57 teeth including 11 minute teeth at end; the largest 15 teeth occupy 0.64 mm; teeth in basal and central areas distinctly spaced, in apical area strongly narrowed; teeth increasing in size in about basal third and decreasing in little less than apical third ( Fig. 7E ). Titillators faintly sclerotized, simple, with elongate and outcurved basal and straight central areas; apical area widened, long oval and strongly setose, at end obliquely subtruncate with distal angle pointed ( Fig. 8E ).

Female unknown.

Measurements (3 males).—body w/o wings: male 19; pronotum: male 7.5–8.25; tegmen: male 3; hind femur: male 10.5–11.0 mm.

Etymology. The new species is named for the shape of the lateral lobes of pronotum forming two lobate expansions at ventral lateral margins.

Figures

FIGURE 7. Kaindiagraecia bilobata sp. nov.: A–D, habitus in dorsal (A), lateral (B–C), and ventral view (D), in C head and pronotum greater enlarged; E, stridulatory file; F–G, tegmina in dorsal (F) and oblique view with left tegmen opened (G), the arrow points at the stridulatory file; H, face; I, ventral view of abdomen with subgenital plate.—Scales 10 mm (A–D), 5 mm (H), 1 mm (E–G, I).

FIGURE 8. Kaindiagraecia bilobata sp. nov. male: A, tenth abdominal tergite and cerci in dorsal view with cerci spread sideward; B, end of abdomen in oblique dorso-apical view with overlapping cerci; C, end of abdomen in oblique dorso-lateral view; D, right cercus in dorsal view; E, titillators; F, pronotum and tegmina from above-behind: when at rest, the male tegmina are nearly fully covered by the pronotum.—Scales 1 mm.