Pycnoscelus sp. E

Fig. 9

Material examined.

Malaysia • 1 male; Borneo, Mt. Trus Madi, Jungle Girl Camp; 2–5 Oct. 2015; Ye-Jie Lin leg. • 1 male; Borneo, Mt. Trus Madi, Jungle Girl Camp; 3 May 2023; Cai-Xia Yuan leg.

Diagnosis.

This species can be readily distinguished from other Pycnoscelus species by the color pattern of pronotum and tegmina. The apical part of sclerite L 2 D of this species is also peculiar in this genus (see description below for details).

Description.

General color yellowish brown, with pronotum, tegmina, and abdominal sternites partly reddish brown (Fig. 9 A, B). Facial part of head dark brownish, with a three-radial stripe between eyes; other part of head, clypeus, labrum and antennae yellowish brown; eyes black, ocellar spots yellow white. Pronotum dark reddish brown, with a yellow stripe along the anterior margin (Fig. 9 C). Tegmina bicolored, the dark part, principally half anal field reddish brown, remainder yellowish hyaline; the boundary between the two regions extends obliquely from the left posterolateral side of the anal field to half of the radial field; in the dark region, dark brown spots scattered along veins (Fig. 9 E). Abdomen yellowish, with last sternites reddish brown. Legs yellowish brown except for reddish brown tibia and tarsomere. Cerci reddish brown.

Head slightly exposed. Interocular space narrower than the distance between ocellar spots and antennal sockets (Fig. 9 D). Pronotum subpentagonal, densely punctured. Tegmina and wings fully developed, exceeding the end of abdomen. Front femur Type C 1. Hind metatarsus slightly longer than other segments combined; four proximal tarsomeres with well-developed pulvilli, the one on the first tarsomere occupying almost the whole length of the segment; claws symmetrical and simple; arolium large. Supra-anal plate weakly asymmetrical, covered with bristles; paraprocts of blaberid type, asymmetrical (Fig. 9 F). Subgenital plate asymmetrical, with the right posterolateral corner sharp and upturned. Left style absent, right style plate-like, broadly trigonal (Fig. 9 H).

Male genitalia. Right phallomere with caudal part of sclerite R 1 T rounded, inner margin produced apically; R 2 nearly straight; R 3 forked caudally, with left branch projected at apex; R 4 plate-like; R 5 lies above R 2 and fused with its distal part (Fig. 9 H). Sclerite L 2 D divided into basal and apical parts, the apical part well sclerotized, irregular, with distal part hairy instead of toothed; apical membrane less developed (Fig. 9 I). Sclerite L 3 hook very short, with the apex widened; sclerite L 4 U present and divided into two parts (Fig. 9 J).

Measurements (mm).

Body length including tegmen: 17.7–18.0; pronotum length × width: 3.8–4.0 × 4.4–4.8; tegmen length: 14.7.

Remarks.

According to the description of P. rufus given by Anisyutkin (2004), Pycnoscelus sp. E closely resembles this species in general color pattern, the shape of right style and right phallomere, but differs in features of pronotum and the apical part of sclerite L 2 D. We refrain from defining Pycnoscelus sp. E as a new species until we examine the type specimen of P. rufus.