Trichophallus solomona pilorota, 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 : 55-57

Trichophallus solomona pilorota subspec. nov.

Fig. 28

Holotype (male): Papua New Guinea: Northern prov. , Popondetta, elev. 60 m, 1–4 September 1963, coll. J. Sedlacek (Bishop Museum Honolulu, BPBM).

Other specimens studied: Papua New Guinea: Northern distr. , Agricultural Station Popondetta , 8August 1962 (coll. A. Catley)— 1 male, head missing (Naturalis Leiden); Northern distr., Agricultural Station Popondetta, 8 August 1962 (coll. A. Catley)— 1 male (Naturalis Leiden). New Guinea (NE), Kokoda , elev. 366 m, 17–18 November 1965 (coll. J. & M. Sedlacek)— 1 male (Bishop Museum, Honolulu ( BPBM)); New Guinea NE, Northern , Kokoda, elev. 366 m, 1–30 September 1933 (coll. L.E. Cheesman)— 1 male ( NHM London) .

Diagnosis. The new subspecies, T. s. pilorota resembles nominate T. solomona in general habitus although it is in the mean of slightly smaller size. Also the male cerci are similar between both taxa having a triangular internal lobe from subapical area. But marked differences can be found in the shape of the stridulatory file which is wider and carries less numerous teeth in T. pilorota (108–110) but narrower and with distinctly more numerous teeth in T. solomona (122–130 teeth).

Description. Medium sized species. Tegmina reaching apical quarter of hind tibia. Femora with the following number of spines on ventral margins: fore femur 4–7 external, 3–5 internal; mid femur 6 external, 2–4 internal near base; hind femur 5–12 external, 10–16 internal.

Fastigium verticis before eyes 0.6 mm; fastigium verticis from base 0.9 mm; dorsal eye length 1.3 mm; greatest diameter of eye 1.3 mm; index fastigium verticis from base: eye length 0.7; index fastigium verticis from base: greatest eye diameter 0.7.

Male. Stridulatory file with about 108–110 teeth. Tenth abdominal tergite terminating into two long conical projections, slightly curved ventrad at apex and almost reaching internal tooth of cercus. Epiproct very small, hidden under projections of tenth tergite. Paraprocts with a long and narrow projection. Cerci elongate, slightly curved, with a large subapical internal tooth, roughly triangular with rounded apex; apical area of cercus behind internal tooth thin, styliform. Subgenital plate with a long excision at apex; styli of about half the length of excised area.

Titillators separate; apical parts triangularly widened at base, apical area conical and apex provided with a hook; apical parts supporting internal surface of membranous bursae which are forming two rounded lobes: around apical area of titillaters and around triangular expansion of apical parts; the latter provided with long bristles along margin. Membranes on each side of titillators with an irregular area of dense granulation. Phallus membranes forming a cap around apices of titillators.

Female unknown.

Coloration. Yellowish brown with patterns 1, 3 and 4.

Measurements of male.—body: 22–27; pronotum: 5.3–5.7; tegmen: 33.5–35.5; hind femur: 16–18 mm.

Etymology. The name of the new subspecies refers to the pilose rounded extension of the titillators (from Latin: pilose = hairy; rota = wheel).

Figures

FIGURE 28. Trichophallus solomona pilorota subspec. nov.: A, stridulatory file; B–C, end of abdomen and cerci in dorsoapical view; D, subgenital plate and cerci in ventral view; E–F, titillators of 2 different males; G, habitus with spread wings; H, face.—Male from northern Popondetta (A, C, E, G, H, in BMH); (B, D, in NHM); (F, in Naturalis).