Parahabetia bispinosa, 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 : 253-254

Parahabetia bispinosa sp. nov.

Figs 22A–G , 23A–C , Map 1(pb).

Holotype (male): Papua New Guinea: Northern (Oro Province), Mai-u R., SW1, Wanigela , (9°22’S, 149°10’E), 1–31.vii.1972, leg. R. Pullen —depository: Naturalis Biodiversity Center, Leiden ( NBC).

Diagnosis. The new species differs from all three subspecies of P. pictifrons by the male cerci that have only two instead of three projections and the apical lobe is compressed instead of swollen. The male subgenital plate is missing the apical projections that occur in all subspecies of P. pictifrons in addition to the styli, and the paraprocts are rather huge for the genus. The titillators are of similar basic shape in both species but in P. bispinosa sp. nov. they are longer and narrower and differ in fine details of the apical structures. Moreover, the stridulatory teeth on the underside of the left tegmen are larger and less numerus, thus more distinct than in P. pictifrons .

Description. Slender but not very long species; general habitus as described under genus. Prosternal spines rather short but distinct; mesosternal lobes with spinose tip, metasternal lobes rounded. Hind knee lobes bi-spinose. Femora with the following number of spines on ventral margins: (1) a 7, p 9; (2) a 7, p 3; (3) a 16 p 17 (n=1).

Male. Stridulatory file on underside of left tegmen 1.73 mm long (or 1.60 mm without the 15 extremely small teeth at end) with 115 teeth; in central 1 mm with 47 teeth, comprising the largest teeth, basal of that area with 15 smaller but distinct teeth, on subapical step with 5 teeth, followed by 33 narrow teeth plus 15 indistinct teeth at end ( Fig. 22G ). Tenth abdominal tergite domed with a weak medial furrow, apical area compressed and divided into a pair of rather short triangular projections with obtuse end ( Fig. 22D ). Epiproct with angular basal margin, converging and downcurved lateral margins and rather wide obtuse end. Paraproctes forming huge and stout plates ( Fig. 22F ). Cerci curved inwards in about mid-length, posterior area compressed and forming two successive semicircles with little concave internal surfaces; proximal semi-circle from anterior margin with a rounded and swollen dorsal process with acute spine at tip, distal semi-circle with a similar process with black apical spine from ventrodistal margin ( Figs 22D–F ). Subgenital plate rather wide in basal half with upcurved lateral areas, in about apical half with strongly narrowing lateral and slightly concave dorsal lateral margins; ventral disc also with swollen lateral margins; apical margin moderately incised between bases of styli ( Fig. 22C ); dorsal margins of upcurved lateral areas with a distinct, laterally projecting rim, followed below by a weak furrow ( Fig. 22F ). Titillators separate, elongate with basal areas curved laterally and widened; central area narrow, band-shaped but slightly sinuate and twisted; at lateral end with a compressed rounded edge forming a lamellar crest that looks in ventral view like a spine; on dorso-proximal side near end of titillators with a pair of small extra sclerites ( Figs 23A–C ).

Coloration. Preserved specimen uniformly yellowish to reddish brown. Face brownish, in middle with a light ochre to whitish brown band from fastigium frontis to upper area of clypeus, also mandibles with a light band of same color. Antennal scrobae in ventral area and rim of fastigium frontis black ( Fig. 22B ). Pronotum partly with dark rim. Tegmen in anterior area with brown cells and light, whitish veins and veinlets, towards posterior area cells becoming of lighter color, hardly darker than light veinlets ( Fig. 22A ).

Measurements (1 male). Body w/o wings: 25; pronotum: 7.6; tegmen: 22; hind femur: 17 mm.

Etymology. The name of the new species refers to the fact that the cerci are provided with only two internal spines instead of three in the type species of the genus; from Latin bi- = prefix for “a pair of” and Latin spinus = thorn.

MAP 1. Known distribution of the species of the genera Habetia (circles and stars with numerals) and Parahabetia (squares with letters): (1) H. spada ( Brunner, 1898) ; (2) H. imitatrix Karny, 1912 ; (3) H. tuta sp. nov.; (4) H. pallida sp. nov.; (5) H. curvata sp. nov.; (6) H. pilleata sp. nov.; (7) H. bivittata sp. nov.; (8) H. kondiu sp. nov.; (9) H. wau sp. nov.; (10) H. multispinulosa Griffini, 1908 ; (11) H. lalibu sp. nov.; (12) H. simbai sp. nov.; (13) H. dentata sp. nov.; (14) H. pinnigera sp. nov.; (15) H. pedala sp. nov.; (16) H. quatrispina sp. nov.; (17) H. sororcula sp. nov.; (18) H. elevata sp. nov.; (19) H. nigricauda sp. nov.; (pp) P. pictifrons pictifrons ( Karny, 1911) ; (po) P. pictifrons obtusa ssp. nov.; (pa) P. pictifrons acuta ssp. nov.; (pb) P. bispinosa sp. nov. The open circle for 10 localizes the area within which the type of H. multispinulosa should have been collected.

Figures

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.