Trichophallus apicatus, 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 : 57

Trichophallus apicatus sp. nov.

Fig. 29

Holotype (male): New Guinea: New Guinea, Wogen, Anazu Bay, 2300‘, elev. 701 m, 23 October–11 December 1962 (coll. W.W. Brand) (Naturalis Leiden).

Other specimens studied: Papua New Guinea: New Guinea (NE), Morobe Dist., Wau, elev. 1200 m, 27 October 1968 – 1 male paratype (Bishop Museum, Honolulu ( BPBM)) .

Diagnosis. The new species is similar to other species that have elongate apical projections of the tenth abdominal tergite, elongate titillators with a single hook at end and membranous lateral expansions that carry a row of hairs as e.g. in T. solomona . It differs by the elongate, narrow, and slightly curved cerci, that have the internal projection inserted nearly at end. Another difference is found in the cerci being slightly but regularly curved over the whole length and divided almost at tip into an incurved dorsal lobe with subacute tip and a substraight ventral lobe also with subobtuse tip; both short.

Description. Medium sized species. Tegmina reaching apex of hind tibia. Femora with the following number of spines on ventral margins: fore femur 3–6 external, 4–5 internal; mid femur 5–6 external, 3 internal near base; hind femur 8–10 external, 11–14 internal.

Male. Stridulatory file on underside of left tegmen with about 103 distinctly spaced teeth. Tenth tergite terminating into two long, conical projections, slightly curved and approaching each other at end, apex long and narrowly excised in between. Epiproct small, obtuse triangular, hidden below projections of tenth tergite. Paraprocts with internal margin extended into compressed, rounded projections. Cerci long and narrow, slightly curved, with a large, conical, subapical, internal projection. Subgenital plate roundly excised at end; styli little shorter than excised area.

Titillators separate, elongate; apical parts at first a little widened, then narrow, at end with an acute hook; apical parts supporting internal surface of small membranous sacs which are roundly projecting and have the margin provided with long bristles. On both sides of apical small sacs phallus membranes with a distinct granular area.

Female. Unknown.

Coloration. Yellowish brown with patterns 0-1-4. Legs with brown dots.

Measurements (2 males).—body w/o wings: 22–25; pronotum: 4.8–5.5; tegmen: 32.0–32.5; hind femur: 15.0– 15.5; antenna: 62 mm.

Etymology. The name of the new species refers to the branching point of the tooth of the cercus.

Figures

FIGURE 29. Trichophallus apicatus sp. nov. male: A, habitus lateral view; B, stridulatory file; C, end of abdomen with supraanal plate and cerci in dorsal view; D, end of abdomen with subgenital plate and cerci in ventral view; E, titillators.