Eupolyphaga bicolor Han, Che & Wang 2024, sp. nov.
Creators: name: Han, Wei
name: Che, Yan-Li
name: Zhang, Pei-Jun
name: Wang, Zong-Qing
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Blattodea
Corydiidae
Eupolyphaga
Eupolyphaga bicolor

description: Eupolyphaga bicolor Han, Che & Wang sp. nov.
Figs 2 A – N, 4 A, B, 5 A, I
Type material.
Holotype: China • male; Guangxi Zhuang Autonomous Region, Guiling City; 14 Feb. 2023; Hao-Fei Fan leg. Paratype: China • 1 female, same collection data as holotype.
Diagnosis.
This species is smaller in male size compared to other congeneric species (body length 16.7–23.4 mm) except E. miracidia (12.1–12.5 mm). It resembles E. sinensis and E. hanae by its yellow abdomen, but it can be distinguished by its almost unicolored tegmina as well as black head and legs (Fig. 2 A, B, G). In addition, the serrations on the keel of this species are distinctly more curved than those of E. hanae, and approximate those of E. sinensis and E. miracidia.
Description.
Male holotype. Measurements (mm). Overall length (including tegmen): 23.51; body length: 15.96; body width (tegmina not included): 8.14; tegmen length × width: 19.66 × 7.77; pronotum length × width: 7.20 × 3.59.
Coloration. Head and face black. Ocelli pale yellowish. Antennal sockets white. Antenna blackish brown. Ante-clypeus whitish and subtransparent (Fig. 2 G). Pronotum and tegmina yellowish brown. Hind wings pale brown. Legs black, coxa and trochanter slightly yellowish brown. Pulvilli and arolia white. Abdomen bright yellow (Fig. 2 A, B).
Body. Head: Sub-rounded, hidden under the pronotum. Interocular space narrower than the distance between ocelli, and the latter narrower than the distance between antennal sockets. Ocelli distinct, ocelli ridge slightly curved, with a row of setae on the upper edge. Clypeus developed (Fig. 2 G). Pronotum: Transverse oval, widest point near the middle. Anterior whitish margin indistinct. Surface covered with long setae (Fig. 2 E). Tegmina and hind wings: Nearly unicolored, extending beyond the end of abdomen (Fig. 2 A, B). Legs: Slender, front femur type C 1. Pulvilli and arolia present (Fig. 2 B). Abdomen: Supra-anal plate transverse, pubescent, posterior margin protruded medially. Paraprocts simple. Cerci short. Subgenital plate densely setose along the lateral and posterior margins, the hind margin slightly concave in the middle. Styli small and short (Fig. 2 I, J). Genitalia: Basal part of L 1 prolonged, two hind lobes robust. L 2 curved. Genital hook (L 3) long, the hooked part curved. Right phallomere long. R 1 M expanded. R 1 L banded. R 2 simple, the basis chunk rounded and the distal flat. R 3 broad and concave (Fig. 2 K, L).
Male paratype. Similar to the holotype, only legs slightly paler in color.
Female paratype. Body length: 22.25; body width: 15.25; pronotum length × width: 10.93 × 5.31.
Coloration. Terga reddish brown. Sterna dark reddish brown. Face black. Ocelli and ante-clypeus yellow. Antennal sockets white. The distal part of labrum pale yellow. Legs black, spines reddish black (Fig. 2 C, D, F, H).
The widest point of the pronotum near the hind margin (Fig. 2 F). Ocelli distinct, the interocular space larger than the distance between antennal sockets, and larger than the distance between the ocelli (Fig. 2 H). Arolia and pulvilli absent. Posterior margin of the supra-anal plate (TX) protruded and emarginated medially. Cerci short, not exceeding the posterior margin of supra-anal plate. Paraprocts (pp.) pubescent, curved hook-like extensions long and robust. The two median sclerites present (Fig. 4 A). Paratergites (pt.) banded, irregularly shaped. Crosspiece (cp.) weakly sclerotized, the protrusion long. Apex of posterior lobes of valvifer II (p. l.) slightly curved. Spermathecal plate (sp. pl.) narrow, concave in the middle, the two lobes each having an arch in the middle (Fig. 5 A). The ampulla of spermatheca (sp.) large and spherical. The middle part and left part of spermathecal duct expanded. The right bifurcated duct expands and bifurcates again in the center, one of the bifurcated ducts connected to a small globular enlargement, while the other is curved and attached to several expansions (Fig. 5 I). Basivalvula (bsv.) transverse, two lobes wide, anterior margin flat, lateral margin curly (Fig. 5 A). Vestibular sclerite (vst. s.) shaped like a “ W ”, with widened apices on both sides and a forked tip in the middle. Subgenital plate (SVII) densely setose, posterior margin protruded, slightly concave in the middle (Fig. 4 B).
Nymph. Unknown.
Ootheca. Yellowish brown. The longitudinal lines distinct. Serrations on the keel large and curved. The space between the serrations of the curved portion distinct. Respiratory canals well developed (Fig. 1 M, N).
Natural history.
Found in the dry soil beside a cave entrance (Hao-Fei Fan pers. comm., Feb. 2023).
Etymology.
The species epithet is derived from the Latin word bicolor, which indicates that males of this species have two distinct colors: blackish head and legs; yellowish tegmina, hind wings and abdomen.
description: Published as part of Han, Wei, Che, Yan-Li, Zhang, Pei-Jun & Wang, Zong-Qing, 2024, New species of Eupolyphaga Chopard, 1929 and Pseudoeupolyphaga Qiu & Che, 2024 (Blattodea, Corydioidea, Corydiinae), with notes on their female genitalia, pp. 151-191 in ZooKeys 1211 on pages 151-191, DOI: 10.3897/zookeys.1211.128805