Kosemia Matsumura, 1927

Qi, Shengping, Hayashi, Masami & Wei, Cong, 2015, A review of the cicada genus Kosemia Matsumura (Hemiptera: Cicadidae), Zootaxa 3911 (4), pp. 451-492 : 452-453

Genus Kosemia Matsumura, 1927

Kosemia Matsumura, 1927: 55 . Type species: Cicadetta sachalinensis Matsumura, 1917 [Type locality: Russia (“Saghalien (Odomari, Toyohara)”)], by original designation.

Leptopsalta Kato, 1928: 185 . Type species: Melampsalta radiator Uhler, 1896 [Type locality: Japan], by original designation. Karapsalta Matsumura, 1931: 1233. [nomen nudum] Type species: Cicadetta sachalinensis Matsumura, 1917 [Type locality: Russia (“Saghalien (Odomari, Toyohara)”)], by monotypy.

Small to medium sized species for Cicadettini (body length male: 14.0–27.0 mm; female: 18.0–27.0 mm). Head ( Fig. 14 C) including eyes nearly as wide as base of mesonotum. Distance between lateral ocellus and nearest eye about as long as distance between lateral ocelli. Postclypeus ( Fig. 14 D) a little prominent anteriorly and shape in transverse cross-section rounded, with central longitudinal sulcus and lateral transverse grooves. Rostrum ( Fig. 14 D) reaching beyond middle coxae. Lateral part of pronotal collar ( Fig. 14 C) ampliate, lateral angle of pronotal collar well ampliate posterolaterally. Wings ( Figs. 14 A–B) hyaline (except for K. mogannia comb. n. whose wings with basal half infuscated); fore wing with eight apical cells; hind wing with six apical cells; veins M and CuA of fore wing contiguous at basal cell but not fused (except for males of K. chinensis comb. n. and both sexes of K. yezoensis whose veins M and CuA of fore wing fused at basal cell); hind wing with veins RP and M fused at base. Male operculum ( Fig. 14 E) slightly oblique; distomedial margin oval or obtusely angulated, approaching to the other one but not meeting it medially; posterior margin not extending to abdominal sternite II. Female operculum ( Fig. 15 B) very small, rounded posteriorly. Meracanthus ( Fig. 13 E) small, triangular, slightly curved laterally, pointing posteriorly. Male abdomen ( Fig. 14 A) cylindrical, not keeled mid-dorsally; sternite VIII ( Fig. 14 E) about as long as or shorter than sternite VII. Female abdomen ( Figs. 16 A–B) conical, gradually narrowed caudally; posterior margin of sternite VII ( Fig. 16 D) with median incision very deep and broad, to about 4/5 the length of sternite VII. Timbal covers absent; timbals usually with two or three long ribs, lacking prominent intermediate short ribs, basal dome large. Male pygofer ( Figs. 15 A, B, D, E) in ventral view ovoid to sub-ovoid in shape, dorsal beak with apex pointed; upper lobe well developed, triangular in lateral view, with apex obtuse; basal lobe moderately developed, tending to be broadly angled in lateral view, somewhat tucked submarginally. Median lobe of uncus ( Figs. 15 A, B, D, E) somewhat duck-bill shaped; apex slightly upswept; paramedian area slightly convex in ventral view, weakly developed but much smaller than anal styles. Clasper ( Figs. 15 A, B, D, E; 18A, B, D, E) moderately elongated, digitate, meeting the other one at base then separated, apex obtuse. Aedeagus ( Figs. 15 C, F; 18C, F) arched, ventral support present; thecal pseudoparameres on dorsal side of theca originated near thecal base, protruding beyond endotheca; ejaculatory duct tubular, slender, with apical portion terminated in endotheca; basal plate of aedeagus broadened anteriorly in dorsal/ventral view. Dorsal beak of female pygofer ( Figs. 16 C, D; 19C, D) short, sharply pointed apically in lateral view, protruding beyond anal styles; ovipositor sheath extending beyond dorsal beak of pygofer.

Distribution. China (Inner Mongolia, Heilongjiang, Liaoning, Hebei, Shanxi, Henan, Shaanxi, Gansu, Qinghai, Ningxia, Xinjiang, Hubei, Zhejiang, Sichuan, Fujian, Yunnan, Tibet, Hong Kong), Russia, Mongolia, Korea, Japan.

Remarks. This genus is similar to Cicadetta Kolenati , but can be distinguished from the latter by the following characteristics: lateral part of pronotal collar ampliate (lateral part of pronotal collar not developed or dilated.in Cicadetta ); median lobe of uncus weakly developed and much smaller than anal styles (median lobe of uncus developed, lobe-like, much longer than anal styles in Cicadetta ); clasper elongate anterolaterally, digitate, apex obtuse (clasper stout, apex somewhat acute in Cicadetta ); aedeagus with pseudoparameres short and acute, slightly protruding beyond the endotheca (aedeagus with pseudoparameres exceedingly long, surpassing the distal end of theca by about half its length in Cicadetta ).

Figures

FIGURE 13. Kosemia fuscoclavalis (Chen, 1943), male. A, C. male genitalia, left lateral view; B, D. male genitalia, ventral view (clasper partially broken).

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.