Kosemia castanea, Qi, Shengping, Hayashi, Masami & Wei, Cong, 2015

Qi, Shengping, Hayashi, Masami & Wei, Cong, 2015, A review of the cicada genus Kosemia Matsumura (Hemiptera: Cicadidae), Zootaxa 3911 (4), pp. 451-492 : 468-471

Kosemia castanea sp. n.

Figures 14–16

Type material. Holotype: ♂ ( NWAFU), [Shaanxi Prov.] Wugong County, 21-v-1983, coll. Zhu Jianguo. Paratypes: [Shaanxi Prov.] 1♂ ( NWAFU), Wugong County, vii-1957, coll. Song Huiwen; 1♂ ( NWAFU), Fengxian County, 2- vi-1974, coll. Tian Chou; 1♀ ( NWAFU), Wugong County, vii-1983, coll. Zhang Yunping; 1♀ ( NWAFU), Fengxian County, vii-1989, coll. Xu Xin ( NWAFU); 1♀ ( NWAFU), Taibai County, 18-vii-1990, coll. Lei Zhongren.

Etymology. The species name castanea refers to the color of the mesonotum and abdomen.

Description. Male. Body above castaneous with black markings on pronotum and base of postclypeus.

Head ( Figs. 14 A–D). Head including eyes narrower than base of mesonotum; vertex reddish brown with grey scattered pile. Ocelli orange-reddish. Eyes generally dark brown. Postclypeus light brown with light orangereddish laterally; two large black patches at base approaching to one another but not meeting medially; transverse grooves of postclypeus slender, black with grey scattered pile. Anteclypeus light brown, with silvery scattered pile. Genae and lora brown with dense, long silvery pubescence. Rostrum brown with dark brown tip.

Thorax ( Figs. 14 C–D). Pronotum shiny black with margins brown; central longitudinal fascia brown, widened posteriorly; lateral part of pronotal collar ampliate and broadly rounded. Mesonotum light brown with submedian and lateral sigilla castaneous . Mesonotum uniformly dull brown in one male paratype and uniformly light brown in one male paratype. Cruciform elevation light brown.

Wings ( Figs. 14 A–B). Fore wing with costal vein pale testaceous; venation of basal two-thirds light brown, apical one-third olivaceous; basal membrane sanguineous; veins M and CuA adjacent to one another at basal cell, but not fused. Hind wing plaga grayish, narrowly along vein 2A to its distal end and around ambient vein of cubital cell 2 and anal cell 1; plaga on most of 3A and basal part of jugum infuscated.

Legs ( Fig. 14 G). Light brown with short, golden setae. Fore leg with fasciae of coxa and one or two spot(s) of trochanter black. Two longitudinal fasciae of fore femur reddish brown. Fore femur with three strong spines beneath: primary spine more slanted; secondary spine half as long as primary spine, somewhat erected; tertiary spine one-third as long as primary spine, slightly slanted; a tiny spine divided from tertiary spine.

Opercula ( Fig. 14 E). Operculum generally light brown, covered with scarce silvery pile; inner margin obtusely angulated; posterior margin slightly oblique, rounded in one male paratype. Meracanthus small, triangular, light brown.

Abdomen ( Figs. 14 A–B, E–F). Abdomen slightly longer than head and thorax together. Timbal with three long ribs. Abdominal tergites shiny castaneous ; posterior margins of tergites III–VII and posterior part of tergite VIII ochraceous. Abdominal sternites pale reddish brown with silvery scattered pile; sternite VIII distinctly shorter than sternite VII, hind margin rounded.

Genitalia ( Figs. 15 A–H). Pygofer golden yellowish. Upper lobe of pygofer well developed, with apex somewhat acute in lateral view; basal lobe of pygofer slightly angled in lateral view. Median lobe of uncus small, black apically. Clasper shiny dark red, weakly elongated, digitate, closely meeting the other one at basal half; apex somewhat straight.

Female ( Figs. 16 A–D). Female longer than male. Head as in male holotype but reddish ochraceous with dense golden pile; head light brownish in one female paratype. Eyes black or black-brown. Postclypeus brown with dense golden pile. Anteclypeus brownish with dense golden pile, slightly tapering towards distal end. Pronotum with margins reddish, furnished with golden setae; central longitudinal fascia reddish and ampliate anteriorly and posteriorly, furnished with short, dense golden pile. Mesonotum and cruciform elevation golden brown with short, dense golden pile. Operculum small, rounded, orange-reddish; lateral margin slightly oblique. Meracanthus reddish, broadly triangular, apex pointed. Abdominal tergites dark reddish; posterior portion of tergite VII and most portion of tergite VIII testaceous; tergite VIII furnished with short, dense golden pile on posterior margin; tergite IX testaceous with dark red Y-shaped marking dorsal-laterally, reaching to apex of dorsal beak; two stigma on tergite IX dark red. Abdominal sternites testaceous red, with dense, short golden setae; posterior margin of sternite VII with median incision very deep and broad, deep to about 4/5 the length of sternite VII. Dorsal beak of pygofer short and sharp, slightly reaching beyond anal styles. Ovipositor sheath dark-brown, slightly protruding beyond apex of dorsal beak. Other morphological characters similar to male.

Measurements. (3♂♂, 3♀♀), mean (range) (in mm). Body length: male 18.0 (17.6–18.5), female 21.7 (20.1–23.4); fore wing length: male 18.4, female 22.8 (21.4–25.0); fore wing width: male 6.7, female 7.9 (7.7–8.2); width of head including eyes: male 5.0 (4.8–5.2), female 5.7 (5.6–6.0); pronotum width (including pronotal collar): male 6.3 (6.1–6.6), female 7.3 (7.1–7.4); mesonotum width: male 5.5 (5.3–5.7), female 6.2 (6.1–6.3). Distribution. China (Shaanxi).

Remarks. This new species is very similar to K. fuscoclavalis ( Chen, 1943) . However, it can be distinguished from the latter by the following characteristics: vertex reddish brown; mesonotum and abdomen mainly castaneous ; abdomen longer than head plus thorax; abdominal tergites with posterior segmental margins narrowly ochraceous; clasper meeting the other one at base, with apical half nearly straight.

Figures

FIGURE 14. Kosemia castanea sp. n., male, holotype. A. habitus, dorsal view; B. habitus, ventral view; C. head and thorax, dorsal view; D. face; E. thorax and anterior part of abdomen, ventral view; F. timbal, dorsal view; G. right fore leg, showing the spines on fore femur.

FIGURE 15. Kosemia castanea sp. n., male, holotype. A, D. male genitalia, left lateral view; B, E. male genitalia, ventral view; C, F. aedeagus, lateral view.

FIGURE 16. Kosemia castanea sp. n., female, paratype. A. habitus, ventral view; B. habitus, dorsal view; C. female terminalia, left lateral view; D. female terminalia, ventral view.