Trichophallus robustus, Ingrisch, 2024

Ingrisch, Sigfrid, 2024, Revision of the genus Trichophallus Ingrisch, 1998 with notes on the genera Secsiva Walker, 1869 and Subrioides C. Willemse, 1966 (Orthoptera: Tettigoniidae: Conocephalinae: Agraeciini), Zootaxa 5442 (1), pp. 1-66 : 42

Trichophallus robustus sp. nov.

Fig. 20

Holotype (female): Papua New Guinea: Papua New Guinea, Kerowagi , 9 November 1965 (coll. Hans Pyka) (Naturalis

Leiden).

Other specimens studied: Papua New Guinea, Tiripini , 13 November 1965 (coll. Hans Pyka)— 1 female (Naturalis Leiden) .

Diagnosis. The new species differs from other species of the genus by the shape of the female subgenital plate that is in basal area tunnel-shaped with a narrow membranous area along midline, and distinctly separated apical lobes oriented dorso-ventrally and terminate into truncate apical margins.

Description. Medium sized to smaller species. Tegmina surpassing middle of hind tibia. Femora with the following number of spines on ventral margins: fore femur 5–8 external, 4–6 internal; mid femur 6–7 external, 3 internal near base; hind femur 10–12 external, 11–16 internal.

Male. Unknown.

Female. Subgenital plate with basal area divided in midline by a narrow membranous zone; apical lobes compressed, inserted just behind the basal area, curved dorsad on both sides, thus lying on both sides of the ovipositor base, moderately wide with apices rounded; basal-lateral extensions separated by a narrow membranous suture from rest of subgenital plate, rather broad with a shallow oblique furrow. Eight abdominal tergite with lateral-posterior angles widely excised but very lateral area faintly projecting again. Ventral ovipositor valves between apical lobes of subgenital plate with dorsal margin only little projecting laterally, with long setae at ventral surface of projecting area.

Coloration. Yellowish brown with patterns 1, 3, and 4. Antennae annulated but scapus and pedicellus unicoloured.

Measurements (2 females).—body: 17–21; pronotum: 5.0–5.2; tegmen: female 30.5–31.0; hind femur: 15.0– 15.5; antenna: 65; ovipositor: 11.0– 11.5 mm.

Etymology. The name of the new species refers to its rather large and stout habitus.

Figures

FIGURE 20. Trichophallus robustus sp. nov. female holotype (A–B) and paratype (C–D): A, habitus lateral view; B, end of abdomen with subgenital plate and base of ovipositor in ventral view; C, do. in lateral view; D, ovipositor in lateral view.