Habetia dentata, 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 : 216-221

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Habetia dentata

sp. nov.

Habetia dentata sp. nov.

Figs 2B View FIGURE 2 , 4D View FIGURE 4 , 6F View FIGURE 6 , 10A–C View FIGURE 10 , 11F View FIGURE 11 , 13G–H View FIGURE 13 , 18E View FIGURE 18 , 20C View FIGURE 20 , Map 1(13).

Holotype (male): Papua New Guinea: Madang, Finisterre Mts., Saidor: Kiambavi Village , (5°35’S, 146°30’E), 22–29.vii.1958, leg. W.W. Brandt —depository: Bernice B. Bishop Museum, Honolulu ( BPBM). GoogleMaps

Other specimens studied: Same data as holotype— 1 female (paratype, BPBM) GoogleMaps .

Diagnosis. The new species is characterized by the shapes of the male cerci and titillators. The cercus is rectangularly curved mediad behind mid-length forming a compressed process with convex distal and concave proximal surface and modified dorsal margin. The titillators form rather simple, U-shaped sclerites that are fused in sub-basal area, have the sub-apical area inflated but at apical margin compressed and provided with a row of acute teeth. The disc of the female subgenital plate has the anterior and the lateral margins rectangularly bent dorsad not gradually curved as in the other species of the genus, and additionally, the anterior margin is also angularly bent anteriorly thus forming a step as is a staircase. H. dentata is also one of the few species with two vertical black bands on the face.

Description. Coloration of face pale with a pair of dark reddish brown to black lateral bands; mandibles of same color as lateral bands; antennal scrobae with brown and black areas, tip of fastigium frontis black ( Fig. 4D View FIGURE 4 ). Femora with the following number of spines on ventral margins: (1) a 6–7, p 7–8; (2) a 6, p 3; (3) a 11–12, p 10–12 (n=2).

Male. Stridulatory file on underside of left tegmen 2.36 mm long, in subapical area faintly sinuously curved but without distinct step, with 110 teeth, of which 21 narrow teeth in curved basal area at 0.56 mm, 44 teeth in central area at 1,18 mm, and 45 narrow teeth in apical area at 0.5 mm. Teeth in about second quarter from base widest and largest, then becoming gradually narrower and very small in white, curved apical area ( Fig. 18E View FIGURE 18 ). Tenth abdominal tergite wider than long, in central area little longer than in lateral areas, lateral margins in about mid-length and at end very faintly projecting; apical margin oblique, in middle interrupted by a wide and deep incision that is little longer than half the length of the tergite, inner margins of that incision curved ventrad and with sub-parallel margins and rounded bottom that is on ventral side extended by a membranous septum; at both sides of apical incision hind margin of tergite little projecting and elevated with sub-straight hind margin, laterally with convex hind margin ( Fig. 10A View FIGURE 10 ). Cerci rather short and little conical, at end prolonged into a large, incurved and laterally compressed process that has the proximal side concave and the distal side convex and carries the following modifications: at base and somewhat at the inner side of the process there is a conical projection that sits on a widened socket and carries at tip a short, rounded, oval extension that is separated from the cone by a distinct constriction; the large cone is followed on the proximal side by a small simple cone and on the distal side by an elongate elevation along the dorsal margin of the process that forms three dorsal bows of decreasing size along its dorsal margin and a minute cone at tip ( Figs 10A–C View FIGURE 10 ). There is another short cone before the incurved end of the process. Subgenital plate in basal area wide with strongly convex lateral margin, in central area rather narrow with parallel lateral margins and flattened surface, then deeply incised from behind and lateral areas continued as narrow parallel stripes that are upcurved at end and carry at tip small styli; anterior margin concave; parallel to the lateral margins with a pair of thickened ridges ( Fig. 11F View FIGURE 11 ). Titillators compressed, strongly curved, only in about mid-length with a sub-straight area; at base widened and free then subfused to about end of basal third; at end compressed with rounded margin that carries six teeth: four large and two small teeth ( Figs 13G–H View FIGURE 13 ).

Female. Subgenital plate with central area in ventral view about rhombic with flattened surface but little concave apical area; anterior and lateral margins nearly rectangularly bent dorsad, anterior area bent in a 90°-angle with little swollen lateral margins and in front curved again anteriorly into a narrow transverse strip with anterior margin convex on both sides, concave in middle; lateral areas with concave surface; apical margin of central area concave on both sides and with a convex lobe in middle; lateral angles extended, curved dorsad into lateral surfaces and give rise to internal septa that seem to form a pair of pockets together with the ventral surface of the plate ( Fig. 6F View FIGURE 6 ). Ovipositor about as long as body length from head to tip of wings; laterally compressed, dorsal margin only faintly convex behind basal constriction ( Fig. 2B View FIGURE 2 ).

Measurements (1 male, 1 female).—Body w/wings: male 35, female 35; body w/o wings: male 27, female 27; pronotum: male 9.5, female 7.5; tegmen: male 13.5, female 26; hind femur: male 18.2, female 19.5; tegmen width: male 4.5; antenna: male 60; ovipositor length: female 31.5; ovipositor height: female 1.9 mm.

Etymology. The new species is named for the dentate tip of the male titillators, a unique character within the genus; from Latin dentatus, dentata = provided with teeth.