Parahabetia pictifrons acuta, Ingrisch, 2021

Ingrisch, Sigfrid, 2021, Revision of the genera Habetia Kirby, 1906 and Parahabetia gen. nov. from New Guinea (Orthoptera, Tettigoniidae, Conocephalinae, Agraeciini), Zootaxa 5020 (2), pp. 201-256 : 250-253

Parahabetia pictifrons acuta ssp. nov.

Figs 21A–D , 22H , 23D , Map 1(pa).

Holotype (male): Papua New Guinea: New Guinea (NE), Northern, Kokoda, elev. 366 m (8°52’S, 147°45’E), 1–30.ix.1933, leg. L.E. Cheesman —depository: The Natural History Museum, London ( NHM).

Diagnosis. P. p. acuta ssp. nov. differs from the nominate subspecies, P. p. pictifrons by the male tenth abdominal tergite that has the apical area divided into two long, narrowly spaced extensions with acute tip instead of more widely spaced obtuse extensions and the three internal projections of the male cerci differ in detail, e.g., the basal process has the tip disc-shaped with a spinule instead of simply little widened, the apical two projections are closer together and the tip is oval instead of rounded. From the subspecies P. p. obtusa ssp. nov., the new subspecies differs by the apical extensions of the tenth abdominal tergite that run closer together, are straight and end into an acute tip instead of running more widely spaced, are downcurved and end into obtuse tips. The second and third internal projections of the male cerci stand closer together and the apical widening of the cercus is oval instead of globular. The male titillators are little narrower and less strongly curved in mid-length. The stridulatory file on the underside of the left tegmen is longer and carries more numerous teeth that are also in apical area clearly visible under a microscope. From both other subspecies, P. p. acuta also differs by the narrow apical extensions of the male subgenital plate that have the tip widened instead of narrowly rounded.

Description. Femora with the following number of spines on ventral margins: (1) a 7, p 9–10; (2) a 7, p 3; (3) missing (n=1).

Male. Stridulatory file ( Fig. 22H ) 1,64 mm long, with 160 teeth, of which are 29 at curved base, 66 large around mid-length, and 65 after step, narrowing and becoming white towards end; area with largest teeth in middle of file with 84 teeth per 0,5 mm. Tenth abdominal tergite domed with faint medial furrow; apical area compressed, pointing posteriorly, and divided into a pair of acute lobes ( Fig. 21A ). Cercus curved mediad before second process and at end faintly laterad; with three dorso-internal projections: the basal projection consisting of a short stem and a compressed, disc-shaped apical area with a small spine at end; second projection narrow elongate with obtuse tip, followed shortly behind by an acute spine-like projection; cercus at end little widened and compressed but still swollen, with obliquely truncate end ( Figs 21B–C ). Subgenital plate at end only faintly incised, provided on both sides of incision and above insertion point of styli with a pair of narrow, slightly curved projections with little widened end ( Fig. 21D ). Titillators elongate and rather narrow; basal area slightly vaulted, curved laterad; central area elongate, nearly parallel-sided, not strongly sclerotized, with internal surface finely pubescent and rather soft; titillators at end strongly sclerotized, forming a hood carrying a compressed crest with little wavy margin that runs oblique against the surface of the apical area of the titillator ( Fig. 23D ).

Measurements (1 male).—Body w/o wings: 23; pronotum: 7; tegmen: 19.5 mm.

Etymology. The name of the new species refers to the shape of the acute apical lobes of the male tenth abdominal tergite; from Latin acutus, acuta = acute.

Figures

FIGURE 21. Parahabetia pictifrons (Karny, 1911) males: A–D, P. p. acuta ssp. nov. (Kokoda); E–G, P. p. obtusa ssp. nov. (McAdam Peak); H–I, P. p. pictifrons (redrawn from Karny 1911).—Abdominal apex in dorso-apical view (A, H), in strict dorsal view (B, E), in oblique lateral view (C, F) and in ventral view (D, G); male subgenital plate (I).—The arrows point at the tip of the projections of the tenth abdominal tergite. Scales 1 mm.

FIGURE 22. Details of male Parahabetia species: A–G: P. bispinosa sp. nov. (Wanigela); H, P. pictifrons acuta ssp. nov. (Kokoda); I, H. pictifrons obtusa ssp. nov. (McAdam Peak).—Habitus dorsal view (A); face (B); male abdominal apex in ventral (C), dorsal (D), lateral (E), and oblique lateral view (F); stridulatory file on underside of left tegmen (G–I). Abbreviation: p paraproctus. Scales 1 mm.

FIGURE 23. Parahabetia sp. males: A–C, P. bispinosa sp. nov. (Wanigela); D, P. pictifrons acuta ssp. nov. (Kokoda); E–I, P. p. obtusa ssp. nov. (McAdam Peak).—Titillators in about ventro-apical view (A, D, G), views on apical areas of titillators (B–C, E–F); face (H); abdominal apex with appendages and end of titillators in situ (I). Abbreviations: 1, 2, 3 process 1–3 of cercus, as apical swelling of cercus, cb bulge around cercus base, ce cercus, e epiproct, op obtuse process of tenth tergite, ps process of subgenital plate, ri rim of subgenital plate, sg subgenital plate, st stylus, ti apical rim of titillator. Scales 1 mm.