Habetia pilleata, 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 : 244-245

Habetia pilleata sp. nov.

Figs 2K , 10D–H , 15A–C , 18F , 20E , Map 1(6).

Holotype (male): Papua New Guinea: Morobe, Wau , elev. 1200 m (7°20’S, 146°45’E), 1.–3.x.1963, leg. J. Sedlacek —depository: Bernice B. Bishop Museum, Honolulu ( BPBM).

Diagnosis. H. pilleata sp. nov. differs from all other species of the genus by the prolonged male subgenital plate that has the apical area divided into two narrow branches that are strongly recurved with the tips pointing dorsocraniad and carry at the upcurved underside minute styli. The apical internal process of the male cerci terminates into a single acute tooth instead of being for a short distance divided at end and terminating into two teeth as in most other species of the genus. Moreover, the male titillators are not strongly curved in about mid-length as in most other species of the genus but fused over almost the whole length except at base and at end; at end they divide into short proximal and distal branches that together form the base for a large, white, and membranous, balloon-like structure. H. pilleata is slightly larger and stouter than other species from the mountain areas, e.g., H. wau sp. nov., that occurs in the same area.

Description. Coloration of face uniformly pale, marbled with light brown and yellowish; mandibles yellow, at base little darker, in apical area brown; labrum and lower area of maxillae brown. Femora with the following number of spines on ventral margins: (1) a 6, p 8; (2) a 7, p 3–4; (3) a 14–16, p 14–15.

Male. Stridulatory file on underside of left tegmen 2.07 mm long with 89 teeth that are in sinuously curved basal area of file still rather large and preceded toward base by a row of tiny, indistinct dots, while at distal end, teeth becoming very dense and indistinct; over total file length with 43 teeth per mm; in central 1 mm of file with 37 teeth ( Fig. 18F ). Tenth abdominal tergite in basal half with dorsal surface faintly convex and with deeply sloping lateral margins, at base with three depressions, one in center and two laterally; apical half of tergite in dorsal view triangular with approaching lateral margins and with a moderately wide incision from apical margin for two thirds of the apical area; anteriorly of the incision is a short and narrow furrow; resulting lobes of tergite at end angularly rounded in dorsal view, but on underside forming an apical hood that is ventrally covered by membrane, has the internal surface flattened and the distal margin produced into a slight, rounded apical lobe ( Figs 10D, 10G ). Epiproct wider than long with obtusely rounded tip. Cerci narrow elongate and in apical area little curved; just before rounded tip with a strong and flattened projection with approaching lateral margins that at end is curved proximad and terminates into an acute tooth ( Figs 10G–H ). Subgenital plate with little more than apical third re-curved with tip pointing dorso-proximad; in ventral view, subgenital plate wide in basal area and deeply incised from basal margin with the incision bordered by strong carinae that are fused to become a flattened plate behind basal incision which divides shortly after into a pair of deviating carinae that, when the plate curves dorsad, are fused with the strengthened dorsal rim of the subgenital plate, thereafter the plate divides into a pair of narrow, deviating, apical lobes that are curved dorso-proximad and terminate into rounded-angular tips; the small styli insert little before end of upcurved underside of apical lobes ( Figs 10E–G ). Titillators fused, forming a ventro-posteriorly rounded duct or channel that is strongly curved around mid-length and open on dorso-proximal side; only very bases are free, roughly triangular with obtuse tips projecting disto-laterad; at apical end, the free dorso-proximal margins are oval, projecting proximad and diverging from each other, while the fused ventro-distal margin is projecting distad; both ends together form a plateau for a strong hyaline protuberance (in preparation with white content) that in apical view is oval, in lateral view becoming tubular and hyaline and terminates on both sides above the proximal ends of the sclerites into a hyaline spine ( Figs 15A–C ). There is also a pair of three-lamellar lateral sclerites.

Female unknown.

Measurements (1 male).—Body w/wings: 46; body w/o wings: 40; pronotum: 9.5; tegmen: 33.5; hind femur: 24; anterior femur: 5.5 mm.

Etymology. The new species is named for the convex membranous cap at top of the titillators; from Latin pilleatus, pilleata = adorned by a cap.

Figures

FIGURE 2. Habitus of Habetia species with moderately long ovipositor (A–J, females; K, male): A, H. bivittata sp. nov. (Chimbu Valley); B, H. dentata sp. nov. (Saidor); C, H. elevata sp. nov. (Salamaua); D, H. pinnigera sp. nov. (Madang); E, H. kondiu sp. nov. (Mendi); F, H. simbai sp. nov. (Simbai); G, H. wau sp. nov. (Nami Creek); H, H. sororcula sp. nov. (Sentani); I, H. nigricauda sp. nov. (Popondetta); J, H. quatrispina sp. nov. (Pionierlager); K, H. pilleata sp. nov. holotype (Wau 1200m). All scales 10 mm.

FIGURE 10. A–C, Habetia dentata sp. nov. (holotype), male abdominal apex with tenth tergite and cerci in apical (A) and dorsal view (B), tip of cercus twice enlarged (C); D–H, Habetia pilleata sp. nov. (holotype), tenth abdominal tergite and cerci in dorsal view (D), abdominal apex with subgenital plate and cerci in lateral view (E), subgenital plate in ventral view (F), end of abdomen in oblique apical view (G), end of cerci and tenth abdominal tergite in strict apical view (H, top side is left).— Abbreviations: 10t end of tenth tergite, ce cercus, e epiproct, pl projection of left cercus, pr projection of right cercus, st stylus. Scales A–B 1 mm (C as B twice enlarged); D–H 5 mm.

FIGURE 15. A–C, Habetia pilleata sp. nov. (Wau 1200 m); D–H, Habetia wau sp. nov. (Wau 1100–1500 m).—Titillators in proximal view (A), distal view (B), oblique proximo-lateral view (C), lateral view (D), oblique lateral view (E), proximal view (F), distal view (G), ventro-distal view (H).—Abbreviations: b base, cds out curved dorsal surface, ls separate lateral sclerite, pp proximal projection, vp ventro-apical projection. Scales 1 mm.

FIGURE 18. Stridulatory files on underside of left tegmen of males of Habetia species: A, H. tuta sp. nov. (Lake Chambri); B, H. pallida sp. nov. (Waris); C, H. pedala sp. nov. (Toricelli Mts); D, H. imitatrix Karny, 1912 (Bongu); E, H. dentata sp. nov. (Saidor); F, H. pilleata sp. nov. (Wau 1200 m); G–H, H. wau sp. nov. (G Nami Creek; H Wau).—Scales 1 mm.

FIGURE 20. Habetia sp. males: Habitus in dorsal view with left wings spread.—A, H. bivittata sp. nov. (Moife); B, H. kondiu sp. nov. (Wabag); C, H. dentata sp. nov. (Saidor); D, H. lalibu sp. nov. (Lalibu); E, H. pilleata sp. nov. (Wau); F, H. simbai sp. nov. (Simbai Valley); G, H. wau sp. nov. (Wau); H, H. tuta sp. nov. (Lake Chambri).—All scales 10 mm.