Ctenoneura delicata, Qiu, Lu, Che, Yan-Li & Wang, Zong-Qing, 2017

Qiu, Lu, Che, Yan-Li & Wang, Zong-Qing, 2017, Contribution to the cockroach genus Ctenoneura Hanitsch, 1925 (Blattodea: Corydioidea: Corydiidae) with descriptions of seven new species from China, Zootaxa 4237 (2), pp. 265-299 : 276-278

Ctenoneura delicata sp. nov.

( Figs. 7 , 19 , 25 E–F )

Type material. Holotype: CHINA: Hainan: male ( SWU), Mt. Diaoluoshan , Lingshui County, 940 m, 16.IV.2015, Lu Qiu & Qi-Kun Bai leg . Paratypes: CHINA: Hainan: 1 male ( SWU, in 100% alcohol), Mt. Diaoluoshan , Lingshui County, 960 m, 15.IV.2015, Lu Qiu & Qi-Kun Bai leg. ; 2 males ( SYSU), Lingshui County, 29.XII.1963, Ji-Cai Li leg.

Diagnosis. C. delicata may be confused with C. papillaris at first sight, but the former can be easily distinguished from the latter by supra-anal plate and subgenital plate: 1) C. delicata with a trapezoid shaped supraanal plate, two very small processes present, basal cerci with weak process directed medially ( Figs. 7 C–D ), while C. papillaris with supra-anal plate transverse, two distinct processes present, basal cerci with a round process directed medially ( Figs. 8 C–D ); 2) C. delicata with one small process near the apex of the subgenital plate, stylus very weak ( Figs. 7 E–F ), while C. papillaris with apex of subgenital plate expanded, stylus robust ( Figs. 8 E–F ).

Description. Male. Body length 6.8–7.0 mm; overall length including tegmen 9.5–10.0 mm; pronotum length×width 2.0–2.1× 2.7–2.8 mm.

Coloration: Two paratypes (SYSU) yellowish brown. Holotype and one paratype newly collected by us dark brown. Head dark brown to black, eyes black, antenna sockets white, antennae from scape to the second subsegment of flagellum and the distal portion brown, the rest flagellum yellow. Pronotal disk dark brown, some individuals with anterior margin brownish yellow laterally, lateral areas of pronotum brown. Tegmina yellowish brown to brown, wings hyaline with RP area brownish yellow, venation brown. Legs brown, tibiae yellowish brown, tarsi pale yellow, spines on the legs yellow, cerci brownish yellow ( Figs. 7 A–B ).

Head: slightly exposed ( Fig. 19 A), eyes wide apart, interocular space greater than the distance between antennal sockets, ocelli very small, face with a Y-shaped convex, antennae from the second subsegment of flagellum with many small yellow pubescent. Pronotum: subcircular ( Fig. 19 A). Tegmina and wings: fullydeveloped extending well beyond end of the abdomen; tegmen with a thick Sc, branches of R oblique, M with 4–6 branches, between R and M presents an intercalary vein, sometimes incomplete, CuA bifurcate ( Fig. 19 B); wing with intercalary vein present, interrupted, M bifurcate, one branch rebifurcate, CuA with 4–6 branches, CuP long and thin ( Fig. 19 C). Legs: front femur type C1, with small processes at the base of hind margin ( Fig. 19 D). Pulvilli absent, arolia quite small, tarsal claws symmetrical, simple. Abdomen: supra-anal plate in dorsal view transverse, the middle of anterior margin trapezoidal shaped, with two very small processes, in between hyaline; cerci long, basal segment slightly protruded directed medially ( Figs. 7 C–D , 19 E). Subgenital plate asymmetrical, the middle bulged, distal part protruding towards right, apex blunt, a fingerlike process on the left of the apex ( Figs. 7 F , 19 F– G); in dorsal view, with a stylus on the left side, minute, delicate and transparent ( Figs. 7 E , 19 G). Genitalia: left phallomere: weakly sclerotized, lvp with a folded lobe, ldp with a small cvp. Right phallomere: R1M irregular, left with two processes, R2 with the apex of elp curved, anterior of R3 slightly acute. Transverse sclerite (tvs): near the right apex bent obtusely, left portion with a protruded slice, towards the base ( Fig. 19 H).

Female. Unknown.

Distribution. China: Hainan Island ( Fig. 4 ).

Etymology. The species epithet is from the Latin word “delicate” meaning small and weak in reference to the small, reduced stylus.

Natural history. Holotype was found inside a small portion of rotten wood ( Fig. 25 E ); one paratype collected by us was observed lying on a dead leaf during night searching ( Fig. 25 F ).

Figures

FIGURE 4. Distribution map of Ctenoneura species in Hainan Island.

FIGURE 7. A – F. Ctenoneura delicata sp. nov., male: A – B. holotype: A. dorsal view; B. ventral view. C – D. supra-anal plate: C. with T 9, dorsal view; D. close-up, dorsal view. E. stylus, ventral view. F. subgenital plate, ventral view.

FIGURE 8. A – F. Ctenoneura papillaris sp. nov., male: A – B. paratype: A. dorsal view; B. ventral view. C – D. supra-anal plate: C. with T 9, dorsal view; D. close-up, dorsal view. E. stylus, ventral view. F. subgenital plate, ventral view.

FIGURE 19. Ctenoneura delicata sp. nov., male from Hainan, China: A. pronotum with exposed head; B. tegmen; C. wing; D. front femur; E. supra-anal plate with T 9, dorsal view; F. subgenital plate, ventral view; G. subgenital plate, dorsal view; H. genitalia, ventral view.

FIGURE 25. A – I. Habitats of Ctenoneura species: A – C. habitats of Ctenoneura heixuanfeng sp. nov. and Ctenoneura delicata sp. nov. (Mt. Diaoluoshan, Hainan). D. habitats of Ctenoneura qiuae sp. nov. (Jinpin, Yunnan). E – F. male C. delicata sp. nov.: E. found inside a dead wood; F. found on a dead leave. G – I. male C. heixuanfeng sp. nov.: G – H. found crawling on the surface of the dead wood; I. found inside a hole in a piece of dead wood. J – M. C. heixuanfeng sp. nov. in lab condition: J. female C. heixuanfen g sp. nov. with its ootheca; K. close-up photo of the ootheca; L. one ootheca embedded in dead wood by the female; M. a pair of C. heixuanfeng sp. nov.. (Photo D photographed by Jian-Yue Qiu, all of the rest photographed by Lu Qiu)