Pycnoscelus puteus Wang & Che, 2025

Pycnoscelus puteus Wang & Che sp. nov.

Fig. 4 View Figure 4

Type material.

Holotype. China • male; Yunnan Prov., Xishuangbanna, Mengla County, Menglun Town, Xishuangbanna Tropical Botanical Garden ; 25 May 2016; Lu Qiu & Zhi-Wei Qiu leg.; SWU -B-BB 120101 . Paratypes. China • 2 males; same collection data as holotype; SWU -B-BB 120102 and 120103 • 1 male; same collection data as holotype; 27 May 2016; SWU -B-BB 120104 • 4 males; Yunnan Prov., Pu’er City, Meizihu Lake ; Lu Qiu & Zhi-Wei Qiu leg.; 20–21 May 2016; SWU -B-BB 120105 to 120109 • 1 male; Yunnan Prov., Xishuangbanna, Jinghong City, Dadugang ; 5 May 2013; Zong-Qing Wang leg.; SWU -B-BB 120110 .

Differential diagnosis.

Pycnoscelus puteus sp. nov. is very similar to P. nigra in general appearance and coloration but differs strongly from the later in interocular distance and male genitalia, especially the sclerotized part associated with sclerite R 1 T and R 2 (compare Fig. 3 F, I View Figure 3 and Fig. 4 F, J View Figure 4 in present paper). Furthermore, the male genitalia distinguish this new species from all other known species of genus Pycnoscelus except P. rothi , but the coloration of the pronotum could separate them easily (compare Fig. 4 E View Figure 4 with Anisyutkin 2002: fig. 1).

Description.

Male (holotype). General color black (Fig. 4 A, B View Figure 4 ). Head black except for yellowish brown clypeo-labral area; maxillary palps and antennae brownish black; eyes black, ocellar spots whitish. Pronotum shining black, with two indistinct, narrow yellow borders anterolaterally (Fig. 4 E View Figure 4 ). Tegmina similar to those of P. nigra , dark when folded. Abdomen and legs brownish black. Cerci slightly lighter.

Body slender. Head slightly exposed. Eyes comparatively small; outer margin of ocelli obscure; interocular space wider than the distance between the inner margin of ocellar spots, and smaller than distance between antennal sockets (Fig. 4 F View Figure 4 ). Pronotum subpentagonal, densely punctured (Fig. 4 E View Figure 4 ). Tegmina and wings extending beyond the end of abdomen. Front femur Type C 1. Hind metatarsus distinctly longer than other segments combined; four proximal tarsomeres with well-developed pulvilli, the one on the first tarsomere occupying almost the complete length of the segment; claws symmetrical and simple; arolium large. Supra-anal plate transverse, slightly asymmetrical, hind margin with a small medial incision (Fig. 4 G View Figure 4 ). Paraprocts of blaberid type, asymmetrical. Subgenital plate asymmetrical, with the right posterolateral corner acute and upturned. Left style minute, right one large and robust (Fig. 4 H View Figure 4 ).

Male genitalia. Right phallomere with caudal part of sclerite R 1 T rounded; R 2 curved; an outgrowth arising from the junction of R 1 T and R 2, with an additional heavily sclerotized part whose surface is pitted; R 3 forked caudally, R 4 plate-like, R 5 absent (Fig. 4 J, K View Figure 4 ). Sclerite L 2 D divided into basal and apical parts: the basal part short, apically widened; the apical part strongly sclerotized with posterior margin distinctly toothed; apical membrane well developed, with surface covered by microtrichia (Fig. 4 L View Figure 4 ). Sclerite L 3 hook with apical incision, inner curved margin with a small tooth; sclerite L 4 U present and divided into two parts (Fig. 4 M, N View Figure 4 ).

Variation.

Body broader, brownish black (Fig. 4 C, D View Figure 4 ); some individuals lack left style (probably missing, Fig. 4 I View Figure 4 ); inner curved margin of hook of sclerite L 3 with two small projections (Fig. 4 N View Figure 4 ).

Measurements (mm).

Male, body length including tegmina: 20.1–20.9; pronotum length × width: 3.7–4.0 × 5.0–5.6; tegmen length: 16.1–18.0.

Etymology.

Derived from the Latin word puteus, referring to the pitted surface of the sclerotized enlargement associated with sclerites R 1 T and R 2.