Trichophallus murua, 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 : 65

Trichophallus murua sp. nov.

Figs. 32A–E , 33F–I

Holotype (male): Papua New Guinea: Gulf district, Murua Agricultural Station (near Kerema ), 1–31 July 1959 (coll. F.X. Ryan); depository: Naturalis Leiden.

Other specimens studied: Same data as holotype, 1 female, paratype (Naturalis Leiden) .

Diagnosis. T. murua resembles T. solomona with regard to the shapes of male last tergite and subgenital plate; also the cerci are similar but end of cercus and internal projection show small but distinct differences: the internal tooth of cercus is less end-near than in T. solomona . The titillators of T. murua are long and only faintly curved in basal area and the narrow conical internal projection inserts at beginning of about apical third while in T. solomona they are strongly curved in basal half and the internal tooth is shorter and arises in subapical area of cercus. The female subgenital plate has less widened lobes that do not touch each other along mid-line while in T. solomona they are wider and touch or slightly overlap along mid-line.

Description. Medium sized species. Tegmina reaching apical quarter of hind tibia. Femora with the following number of spines on ventral margins: fore femur 4–6 external, 3–4 internal; mid femur 6 external, 3 internal near base; hind femur 8–12 external, 10–13 internal.

Male. Stridulatory file with about 152 teeth. Tenth abdominal tergite with two long apical projections slightly curved mediad and ventrad. Epiproct triangular with a pit in middle. Paraprocts with a rather short styliform projection at internal margin. Cerci elongate, narrow, very faintly sinuate, with a large compressed internal tooth in middle of length which is conical and with setose apex. Subgenital plate long-roundly excised at apex; setose, especially dorsal (= internal) and medial areas of apical lobes densely covered with long setae; styli little shorter than excised area. Titillators sub-fused in basal-central area; elongate, narrow, regularly curved throughout; apical parts a little widened at base, then narrow, apex with an acute hook; apical parts supporting internal surface of hyaline bursae; bursae roundly projecting and margin provided with long bristles.

Female. Tenth abdominal tergite divided and apex with a short conical projection at both sides of midline. Subgenital plate setose; a little more than basal quarter entire and deeply furrowed, otherwise divided into two broad lobes, internal margins converging at base, then diverging; apex of lobes obliquely convex with angles broadly rounded; basal-lateral areas broad and long, projecting dorsad with surface concave and apical margin truncate. Eighth tergite with lateral areas completely shortened for the length of the projections of the subgenital plate. Dorsal margin of ventral ovipositor valves at base with a setose projection pointing ventrad and has the proximal half swollen.

Coloration. Yellowish brown with patterns 0-1-4. Frons with four small black spots lateral and dorsal of medial ocellus. Legs with brown dots. hind femur indistinctly striated. Variation: in male vertex and pronotum with a light brown medial band that includes pattern 3.

Measurements (length in mm):—body: male 24, female 22; pronotum: male 6.1, female 5.2; tegmen: male 36, female 34; hind femur: male 17, female 16; ovipositor: 12 mm.

Etymology.—Named after the type locality, noun in apposition.

Figures

FIGURE 32. A–E: Trichophallus murua sp. nov. from Murua, holotype; F–K: Trichophallus willemsei sp. nov. from Aroa Estate, holotype.—A, F, stridulatory file; B, G, supra-anal plate and cerci; C, H, subgenital plate and cerci; D–E, I–K, titillators in ventro-apical (D, I), oblique lateral (E, K), and apical view (J). I and J not to scale.

FIGURE 33. A–E, Trichophallus willemsei sp. nov. from Brown River (A), Mt. Tafa (B), Middle Fly River (C, E), Koitaki (D).—F–I, Trichophallus murua sp. nov. from Murua.—A–D, H: female subgenital plate in ventral view; E, G, Ovipositor; F, habitus female; I, subgenital plate in lateral view.—Abbreviation in I: l, basal lobe of ventral ovipositor valve.