Kiotina bilobata, Mo & Wang & Li & Murányi, 2019

Mo, Raorao, Wang, Guoquan, Li, Weihai & Murányi, Dávid, 2019, A remarkable new species of Kiotina Klapálek, 1907 (Plecoptera: Perlidae) from China, Zootaxa 4623 (3), pp. 583-588 : 584

Kiotina bilobata sp. nov.

( Figs. 1–3 )

Adult habitus. General color brown. Head pale brown with a large subrectangular darker marking from occiput to anterior ocellus area and a smaller subtriangular marking in frontal region and with distinct pale M-line and oval tentorial callosities as large as an ocellus. Apparently biocellate, ocelli large and widely spaced, distance between ocelli about twice as long as diameter of an ocellus and slightly larger than distance from the eyes. Antennae brown; scape and pedicel dark brown; palpi and cerci brown. Pronotum brown, nearly trapezoidal, with obtuse corners and pale lateral margins bearing distinctly darker rugosities and dark brown along median suture. Wings pale brownish, subhyaline, and veins brown. Legs mostly brown, except apex of femora and base of tibiae darker; tibiae with a bulge present ¼ the distance from the base.

Male. ( Figs. 1–3 ). Forewing length 16.5–18.0 mm, hindwing length 14.5–16.0 mm. Tergum 10 bearing a pair of short, prominent darkened, triangular spines positioned on either side of a sclerotized epiproct and a pair of blunt, darkened projections on posterior margin of tergum 10 above cercal bases. Epiproct sclerite nearly U-shaped with short basolateral extension ( Fig. 2c ). Paraprocts basally strongly curved forward and apical half straight, apex blunt. Hammer oval, gradually tapering toward triangular unpigmented tip, and located at mid-posterior margin of sternum 9; dorsal portion darkly sclerotized and ventral portion pale in lateral view ( Figs. 2 d–2f).

Aedeagus ( Fig. 3 ). Mostly membranous, tubular with longitudinal and transverse wrinkles. A large elliptical patch of triangular spinules present at apex in dorsal view, about ½ width of tubular structure, and detected by transparency when incompletely everted. A pair of ventrolateral membranous lobes present at the apical part, diameter of one lobe smaller than the width of ½ of spinous patch.

Female. Unknown.

Type material. Holotype male ( NMP), China: Zhejiang Province, Hangzhou City, Mt. West Tianmushan , bor- der of secondary mixed forest near entrance of reserve, 30°18'34.5" N 119°26'46" E, 310 m, 2017. VI.23–VII.6, light trap, J. Hájek & J. Růžička . Paratype: 1 male ( HIST), Guangdong Province, Lianzhou City, Nanling National Nature Reserve, Mt. Dadongshan , border of mixed forest, 24°56.0' N, 112°42.9' E, 690 m, 2013. IV.18–21, light trap, J. Hájek & J. Růžička .

Etymology. The name refers to a pair of ventrolateral lobes in the apical part of aedeagus. Latin “bi-” means two, double, and “lobus” means lobes.

Distribution. China (Guangdong and Zhejiang provinces).

Remarks. The male of K. bilobata seems to be intermediate between Kiotina and the related genus Flavoperla Chu, 1929 , in regard to body size and the position of ocelli. However, the presence of a well-developed epiproct and wide ventral vesicle justifies its placement in Kiotina . The new species is most similar to K. bifurcata Stark & Sivec, 2008 in having a nearly U-shaped epiproct sclerite, but both species are separated by the shape of the tergal spines which, in the new species are not bifurcate. Among species of the Kiotina that can be directly compared, the U-shaped epiproct sclerite in K. bilobata distinguishes it from that of K. albopila , K. collaris ( Banks, 1937) , K. delicata , K. quadrituberculata and K. riukiuensis Uéno, 1938 , these species share a Y-shaped epiproct sclerite.

Figures

FIGURE 1. Kiotina bilobata sp. nov. (male). Adult habitus, dorsal view. Scale 2 mm.

FIGURE 2. Kiotina bilobata sp. nov. (male). a. Head and pronotum, dorsal view. b. Right hind leg, outer face. c. Terminalia, dorsal view. d. Terminalia, ventral view. e. Hammer of sternum 9, ventral view. f. Hammer of sternum 9, lateral view. Scale 1 mm for Figs. a–f.

FIGURE 3. Kiotina bilobata sp. nov. (male). a. Partially everted aedeagus, dorsal view. b. Partially everted aedeagus, ventral view. c. Aedeagus, dorsal view. d. Aedeagus, ventral view. e. Apex of aedeagal sac, lateral view. Scale 1 mm for Figs. a–b, 0.5 mm for Figs. c–e.