Kosemia yamashitai ( Esaki & Ishihara, 1950 )

Qi, Shengping, Hayashi, Masami & Wei, Cong, 2015, A review of the cicada genus Kosemia Matsumura (Hemiptera: Cicadidae), Zootaxa 3911 (4), pp. 451-492 : 463-466

Kosemia yamashitai ( Esaki & Ishihara, 1950)

Figures 9–11

Melampsalta yamashitai Esaki & Ishihara, 1950: 40 . Cicadetta yamashitai: Nast, 1972: 155 .

Leptopsalta yamashitai: Chou et al., 1997: 51 . Kosemia yamashitai: Sanborn, 2013: 525 .

Material examined. Holotype ♂ ( ELKU), Henglingkan, Shansi, 12-v-1942, H. Yamashita leg.; allotopotype ♀ ( ELKU), same data as holotype; 1♂ ( NWAFU), Shaanxi Prov., Fengxian County, 28-v-1974, coll. Gu Zhixiang; 2♂ ( NWAFU), Gansu Prov., Gangu County, v-1982, coll. Zhang Guisheng; 1♂ ( NWAFU), Zhejiang Prov., Fengyang Mountain, 20-vii-1982, coll. unknown; 1♂ ( NWAFU), Shaanxi Prov., Taibai Mountain, 2100m, 10-vi- 1983, coll. unknown; 1♂ ( NWAFU), Shaanxi Prov., Ningshan County, vi-1984, coll. unknown; 1♂ ( NWAFU), Shaanxi Prov., Fengxian County, vii-1974, coll. Xie Liping; 1♂ ( NWAFU), Shaanxi Prov., Yangling Agricultural Hi-tech Industries Demonstration Zone, 2-vi-1986, coll. Zhou Jingruo; 1♂ ( NWAFU), Gansu Prov., Maiji Mountain, 1300m, coll. Tang Qiaorui; 1♀ Hubei Prov., Shennongjia, 800-1300m, 19-vii-2003, coll. Sun Hongyan; 1♂, 1♀ ( NWAFU), Shaanxi Prov., Yangling Agricultural Hi-tech Industries Demonstration Zone, 520m, 7-vi-2013, coll. Qi Shengping.

Description. Male. Ground color of body black, body (especially head and thoracic nota) densely covered with blackish hairs and gold pubescence.

Head ( Figs. 9 A–D). Head including eyes slightly narrower than base of mesonotum. Supra-antennal plates slightly brown. Ocelli orange-reddish. Eyes dark brown. Postclypeus black with dark brown laterally. Gena and anteclypeus black with dense, long silvery pile. Antennae, lora and two-thirds of rostrum black.

Thorax ( Figs. 9 C–D). Pronotum black, with marginal area, especially on the brown posterior margin, densely covered with blackish hairs and gold pubescence laterally; pronotum also with a reversed Y-shaped elevation, black or slightly brown. Lateral part of pronotal collar ampliate and rounded; lateral angle well ampliate posterolaterally. Mesonotum black except for brown cruciform elevation, with dark brown setae around.

Wings ( Figs. 9 A–B). Fore wing hyaline with dark brown veins, which are darkened apically; costal membrane and costal vein light brown; basal membrane sanguineous; veins M and CuA contiguous only at basal points. Hind wing plaga 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 also infuscated.

Legs ( Fig. 9 G). General color black with light brownish setae. Front coxa black with base, apex and marginal parts brown. Anterior trochanter black, with apical margin brown. Fore femur with three strong spines beneath, all slightly slanted, black at base and shiny reddish apically, decreasing in size from primary to tertiary spine; a tiny spine divided from tertiary spine. Mid and hind legs much lighter in hue as compared with fore legs, with light brownish setae.

Opercula ( Fig. 9 E). Operculum generally dark brownish and slightly darkened basally, coarsely covered with light brownish pubescence; inner margin rounded; lateral margin weakly oblique; posterior margin slightly rounded. Meracanthus dark brownish.

Abdomen ( Figs. 9 A–B, E–F). Abdomen about as long as head and thorax together. Timbal with two long ribs. Abdominal tergites almost black, furnished with short gold pubescence, gradually attenuated posteriorly; tergites I–II almost black; posterior margins of tergites III–VII and posterior portion of tergite VIII brown. Abdominal sternites almost black with light brownish, dense setae; posterior margin of each sternite and posterior half of terminal segment brown.

Genitalia ( Figs. 10 A–D). Pygofer black dorsally, brown laterally. Dorsal beak of pygofer slightly short and broad, pointed at apex. Upper lobe of pygofer slightly concave, distant from dorsal beak, rounded in lateral view. Basal lobe of pygofer tending to be broadly angled in lateral view. Median lobe of uncus small, black, apex slightly upswept in lateral view, paramedian area slightly convex in ventral view. Clasper shiny black reddish, slightly elongated, digitate, meeting the other one at base then moderately separated anterolaterally; apex obtuse.

Female ( Figs. 11 A–D). Body, especially abdomen, longer than male. Supra-antennal plates slightly pale testaceous. Wings with veins lighter in hue than male. Operculum very small, dark brown, posterior margin rounded; meracanthus black, broadly triangular, very small. Abdominal sternites light brown, furnished with short silvery pile; middle of venter striped with a series of large, black spots; posterior margin of sternite VII with median incision very deep and broad, deep to about 4/5 the length of sternite VII; a pair of oblique black patches on anterolateral parts of sternite VII. Dorsal beak of pygofer black and sharp, reaching beyond anal styles. Ovipositor sheath dark-reddish, slightly protruding beyond apex of dorsal beak. Other morphological characters similar to male.

Measurements. (9♂♂, 2♀♀), mean (range) (in mm). Body length: male 18.3 (16.6–19.0), female 20.3 (19.3–21.3); fore wing length: male 19.0 (17.1–20.7), female 21.0 (20.5–21.5); fore wing width: male 6.9 (6.4–7.4), female 7.9 (7.6–8.2); width of head including eyes: male 5.1 (4.6–5.3), female 5.5 (5.2–5.8); pronotum width (including pronotal collar): male 6.6 (6.3–7.0), female 7.4 (7.3–7.4); mesonotum width: male 5.5 (4.8–5.7), female 6.3 (6.2–6.3).

Distribution. China (Shanxi, Hubei, Shaanxi, Gansu, Ningxia).

Remarks. This species is allied to K. yezoensis . However, it can be distinguished from the latter by the following characteristics: body size smaller; mesonotum black except for brown cruciform elevation; male abdominal sternites black with posterior margin of each segment brown.

Figures

FIGURE 9. Kosemia yamashitai (Esaki & Ishihara, 1950), male. 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 10. Kosemia yamashitai (Esaki & Ishihara, 1950), male. A, C. male genitalia, left lateral view; B, D. male genitalia, ventral view.

FIGURE 11. Kosemia yamashitai (Esaki & Ishihara, 1950), female. A. habitus, dorsal view; B. habitus, ventral view; C. female terminalia, left lateral view; D. female terminalia, ventral view.