Kosemia guanzhongensis, 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 : 472-475

Kosemia guanzhongensis sp. n.

Figures 17–19

Type material. Holotype: ♂ ( NWAFU), [Shaanxi Prov.] Yangling Agricultural Hi-tech Industries Demonstration Zone, 29-vii-1990, coll. Lei Zhongren. Paratypes: [Shaanxi Prov.] 3♂ ( NWAFU), Yangling Agricultural Hi-tech Industries Demonstration Zone, 19-vii-1990, coll. Lei Zhongren; 1♂ ( NWAFU), Wugong County, vii-1933, coll. Yang Linghuan; 1♂ ( NWAFU), Wugong County, 3-vi-1988, coll. unknown; 1♂ ( NWAFU), Yangling Agricultural Hi-tech Industries Demonstration Zone, vi-1991, coll. unknown; 1♀ ( NWAFU), Taibai County, 20-vii-1990, coll. unknown; 1♀ ( NWAFU), Yangling Agricultural Hi-tech Industries Demonstration Zone, vi-1991, coll. unknown ( NWAFU); 1♀, Zhouzhi County, 23-vii-1996, coll. Zhang Cuixuan.

Etymology. The species is named after the type locality which is located at the middle part of Shaanxi Province and generally referred to as Guanzhong Area in China.

Description. Male. Body small, almost cylindrical, furnished with golden pubescence.

Head ( Figs. 17 A–D). Head including eyes narrower than base of mesonotum; vertex reddish brown with some irregular fuscous markings. Eyes generally brown. Ocelli generally reddish (yellowish in two male paratypes). Postclypeus black, faded to brown distally and laterally, black area covering central sulcus and transverse grooves generally smaller and lighter (dark brown) in lighter specimens and wider in darker ones; two rather large black patches at base, while entirely black in some paratypes. Anteclypeus dark brown or black in some paratypes, with golden scattered pubescence laterally. Antennae dark brown or black. Lora and genae brown or black with dense, long golden pubescence. Rostrum dark brown with tip black, basal joint of rostrum brown.

Thorax ( Figs. 17 A–D). Pronotum shiny black with margins and central longitudinal fascia light brown; central longitudinal fascia slightly ampliate anteriorly and strongly ampliate posteriorly, where it contains a dark brown or black spot. Lateral part of pronotal collar ampliate laterally and rounded; lateral angle well ampliate posterolaterally. Mesonotum light brown with submedian and lateral sigilla castaneous . Cruciform elevation light brown. Two scutal depressions in front of cruciform elevation fuzzy, dark brown or black.

Wings ( Figs. 17 A–B). Wings hyaline with venation proximally yellowish becoming fuscous distally. Fore wing with veins M and CuA adjacent to one another at basal cell, but not fused as one; basal membrane orangereddish. Hind wing plaga dark brown, 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. 17 G). Light brown, with dense, short golden setae. Fore leg with fasciae of coxa, one or two spot(s) of trochanter, two longitudinal fasciae of femur, all black. Fore femur with three strong spines beneath, all slightly slanted and shiny reddish brown apically, decreasing in size from primary to tertiary spine; a tiny spine divided from tertiary spine in some paratypes. Mid and hind legs much lighter in hue as compared with fore legs.

Opercula ( Fig. 17 E). Operculum generally light brown with silvery scattered pile; apical half raised above level of tympanal cavity, weakly curving outwards at distomedial margin; apical margin rounded, not reaching to posterior margin of tympanal cavity. Meracanthus light brown.

Abdomen ( Figs. 17 A–B, E–F). Timbal with two long ribs. Abdominal tergites almost shiny black; posterior margins of tergites II–VII and posterior portion of tergite VIII yellow; posterior margin of tergite VIII indented medially. Abdominal sternites black with dense, short golden setae; sternite II orange-yellow; posterior margins of sternites III–VI, epipleurites III–VI and most posterior portion of sternite VII–VIII, all pale yellow; sternite VIII distinctly shorter than sternite VII.

Genitalia ( Figs. 18 A–F). Pygofer almost light brown. Dorsal beak of pygofer generally short and broad at base and tapering towards apex. Upper lobe of pygofer about right angled in lateral view, apex obtuse; basal lobe of pygofer tending to be broadly angled in lateral view. Median lobe of uncus small, paramedian area slightly convex in ventral view. Clasper moderately developed, digitate, meeting the other one at base and then strongly curving anterolaterally; apex obtuse.

Female ( Figs. 19 A–D). Female longer than male. Supra-antennal plate reddish brown. Eye generally brownish. Rostrum dark brown. Operculum very small, rounded, light brown; meracanthus light brown, broadly triangular, with apex pointed. Abdominal tergites almost black; posterior margin of tergite VII and posterior portion of tergite VIII yellowish; tergite IX pale yellowish, with black Y-shaped marking dorsal-laterally, reaching to apex of dorsal beak; two stigma of tergite IX black-brown. Abdominal sternites ochraceous or light brown, furnished with dense, short golden setae; middle of venter striped with a series of black spots; posterior margin of sternite VII with median incision very deep and broad, deep to about 4/5 the length of sternite VII; two oblique black patches on anterolateral parts of sternite VII. Dorsal beak of pygofer short and sharp, reaching beyond anal styles. Ovipositor sheath dark-brown to black, protruding beyond apex of dorsal beak. Other morphological characters similar to male.

Measurements. (7♂♂, 3♀♀), mean (range) (in mm). Body length: male 18.5 (18.0–19.8), female 20.6 (19.0–22.3); fore wing length: male 18.9 (18.1–19.8), female 21.4 (19.7–23.2); fore wing width: male 7.1 (6.8–7.3), female 7.8 (7.1–8.2); width of head including eyes: male 5.1 (4.9–5.3), female 5.5 (5.3–5.7); pronotum width (including pronotal collar): male 6.2 (6.1–6.3), female 7.1 (6.6–8.1); mesonotum width: male 5.7 (5.2–6.0), female 6.2 (5.5–6.7).

Distribution. China (Shaanxi).

Remarks. This new species is very similar to K. castaneous sp. n.. However, it can be distinguished from the latter by the following characteristics: mesonotum and cruciform elevation light brown; abdominal tergites black with narrow yellow posterior margins; operculum short, not extending to posterior margin of tympanal cavity; clasper moderately developed, meeting the other one at base and then strongly curving anterolaterally.

This new species is also very similar to K. yezoensis ( Matsumura, 1898) and K. admirabilis ( Kato, 1927) . However, it can be distinguished from these species by the following characteristics: vertex reddish brown; rostrum only reaching beyond anterior margin of middle coxae; mesonotum castaneous or brown, without black markings; abdomen almost cylindrical; abdominal sternite VII about as long as sternites V–VI together.

Figures

FIGURE 17. Kosemia guanzhongensis 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. left fore leg, showing the spines on fore femur.

FIGURE 18. Kosemia guanzhongensis sp. n., male, holotype. A, D. male genitalia, left lateral view, aedeagus partly visible; B, E. male genitalia, ventral view; C, F. aedeagus, lateral view.

FIGURE 19. Kosemia guanzhongensis sp. n., female, paratype. A. habitus, ventral view; B. habitus, dorsal view; C. female terminalia, left lateral view; D. female terminalia, ventral view.