Habetia lalibu Ingrisch 2021, sp. nov.
Creators: name: Ingrisch, Sigfrid
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Orthoptera
Tettigoniidae
Habetia
Habetia lalibu

description: <i>Habetia lalibu</i> sp. nov. Figs 4G, 9F, 11J, 16J–L, 19G, 20D, Map 1(11). <b>Holotype (male):</b> Papua New Guinea: New Guinea NE, Lalibu, elev. 2300 m (6°16’S, 143°59’E), 8–14.iv.1968, leg. J.L. Gressitt &amp; Mea —depository: Bernice B. Bishop Museum, Honolulu (BPBM). <b>Other specimens studied:</b> same data as holotype 1 male (paratype, BPBM). <b>Diagnosis.</b> <i>H. lalibu</i> <b>sp. nov.</b> belongs to a group of species that have the male cerci with a simple, rounded projection on the dorsal margin just before the cercus is curved mediad into the compressed apical internal process instead of a prolonged, wavy projection as in <i>H. bivittata</i> <b>sp. nov.</b> It differs from the other three species with similar basic structure of the cerci (<i>H. kondiu</i> <b>sp. nov.</b>, <i>H. simbai</i> <b>sp. nov.</b>, and <i>H. wau</i> <b>sp. nov.</b>) by the dorsal projection that is swollen instead of flattened and the internal projection is almost parallel sided with a pair of tubercles of equal size at tip instead of with distinctly converging margins and with a pair of acute teeth or with a curved process as in <i>H. wau</i>. The male tenth abdominal tergite has a narrow and short apical incision as in <i>H. simbai</i> but different from the long and wide apical incision as in <i>H. kondiu</i> and <i>H. wau</i>; however, the tenth tergite of <i>H. lalibu</i> has the apical margin concave on both sides of the incision and with a short obtuse projection on both sides, while in <i>H. simbai</i> the apical margin on both sides of the apical incision is obliquely truncate. The male titillators of <i>H. lalibu</i> have the proximal projections subfused and with upcurved lateral margins, forming together a wide furrow, and the distal projections are widened and strongly curved, while in the two species with similar titillators, <i>H. simbai</i> and <i>H. kondiu</i>, the proximal projections are separate, and the distal projections forming moveable arms or are separated from the titillator stem. <b>Description.</b> Coloration of face of general color; mandibles darkened at base, otherwise of general color; in one male part of antennal scrobae in external half of ventral margin black (Fig. 4G). Femora with the following number of spines on ventral margins: (1) a 6, p 6–9; (2) a 5–6, p 3; (3) a 9–11, p 10–11 (n=2). Male. Stridulatory file on underside of left tegmen 1.6 mm long, with 87–88 teeth that are at both ends very narrow with 15–16 basal and 23–28 apical teeth, in central 1 mm of file with 48–49 teeth, of which are 21–22 largest teeth in central 0.5 mm, n = 2 (Fig. 19G). Tenth abdominal tergite in about basal half with sub-parallel but little wavy, down-curved lateral areas, afterward with approaching lateral margins, forming a pair of obtuse triangular lobes, in middle of concave hind margin between both triangular lobes roundly incised (Fig. 9F). Epiproct with medial furrow and apical margin rounded. Cerci elongate, rounded with slightly approaching lateral margins; at end suddenly bent in a roughly 90°-angle mediad into compressed internal projections that end into a pair of very short, obtuse tubercles; cercus stem just before apical curvature with a semi-circular but little swollen dorsal crest; internal surface of cercus little excavated around curvature (Fig. 9F). Subgenital plate in lateral view curved throughout; in basal area elevated and provided with a large oval swelling that is in situ probably hidden by the ninth tergite, afterward with dorsal rim and a lateral furrow in about mid-length of plate; ventral surface from base with a large triangular and membranous incision, lateral margins little swollen; in about apical third subgenital plate deep roundly, in middle little angularly incised and up-curved, in apical area consisting only of the stiffened lateral margins that are faintly approaching towards tip; styli short, inserted at underside of the narrow apical extensions of the subgenital plate (Fig. 11J). Titillators at base slightly widened and faintly curved, basal branches subfused, separated by a fine membranous suture; in upper area divided into proximal and distal branches; proximal branches stick together, curved proximo-ventrad, have lateral areas upcurved, and tip shortly bi-lobate; distal branches around dividing point fully fused and black, after a short distance divided from each other and running more dorsad and laterad; afterward they are strongly curved ventrad and little approaching each other while becoming markedly wider and reddish brown, at end they are compressed, becoming roughly circular plates with granular surface and margin and are slightly projecting distad (Figs 16J–L). There is also a pair of large elongate lateral sclerites with three flattened expansions from a little wavy central spindle, and the membranes covering the titillators dorsally are provided with a pair of small, rounded caps. Measurements (2 males).—Body w/wings: 39–41; body w/o wings: 32–33; pronotum: 8.2–8.5; tegmen: 28.5– 29.5; hind femur: 20.0–21.5; tegmen width: 4.5–5.0 mm. <b>Etymology.</b> The new species is named after the type locality, noun in apposition.
description: Published as part of <i>Ingrisch, Sigfrid, 2021, Revision of the genera Habetia Kirby, 1906 and Parahabetia gen. nov. from New Guinea (Orthoptera, Tettigoniidae, Conocephalinae, Agraeciini), pp. 201-256 in Zootaxa 5020 (2)</i> on pages 238-239, DOI: 10.11646/zootaxa.5020.2.1, http://zenodo.org/record/5223173