Metidiocerus impressifrons (Kirschbaum, 1868)

Xue, Qingquan, Nyima, Tenzin, Da, Wa & Zhang, Yalin, 2025, Taxonomy of eurymeline leafhoppers from Xizang, China (Hemiptera: Cicadellidae) with two new genera and three new species, Zootaxa 5683 (3), pp. 377-396 : 381

Metidiocerus impressifrons (Kirschbaum, 1868)

( Figs 3A–M , 9A–F )

Idiocerus impressifrons Kirschbaum, 1868: 14 .

Tremulicerus impressifrons (Kirschbaum, 1868) : Dlabola, 1974: 63.

Idiocerus ( Idiocerus) impressifrons (Kirschbaum, 1868) : Hamilton, 1980: 827.

Idiocerus ( Metidiocerus) impressifrons (Kirschbaum, 1868) : Kwon, 1985: 70.

Metidiocerus impressifrons (Kirschbaum, 1868) : Nickel, Holzinger & Wachmann, 2002: 290.

Diagnosis. Body brown. Crown brownish, often with many white spots; male with a black spot on either side of midline and black markings close to eyes ( Fig. 3C ). Face yellowish; inner margin of gena and lorum with brown or dark brown longitudinal stripe; gena with brown or dark brown longitudinal stripe in middle ( Fig. 3D ). Pronotum brown with many white spots, and a hoary longitudinal stripe in middle; male with several black markings on apical half. Style with two elongate processes near apex and a row of short fine setae on dorsal margin ( Fig. 9F ). Aedeagus with pair of short lateral subapical processes; apex broadened, upper process concave in ventral view; dorsal apodeme well-developed in lateral view ( Figs 9D–E ).

Material examined. 2♂♂, China, Xizang Autonomous Region, Linzhi City , Chayu County, Shangchayu Town , 2019.vi.8, 1900m, coll. Lin Lu ( NWAFU) ; 6♂♂ 11♀♀, China, Xizang Autonomous Region, Shigatse City, Gyirong Town , 2022.vii.18, 2800m, coll. Qingquan Xue ( NWAFU) .

Distribution. China ( Heilongjiang, Hebei, Henan, Shanxi, Shaanxi, Xinjiang, Xizang), Russia, South Korea.

Remarks. The body color of this species varies from brown to black. The face with three pairs of brown to black longitudinal stripes and the pronotum with a median hoary longitudinal stripe distinguish this species.

Figures

FIGURE 3. Metidiocerus impressifrons (Kirschbaum) A, habitus of male, dorsal view; B, habitus of male, lateral view; C, head and thorax of male, dorsal view; D, face of male; E, head and thorax of female, dorsal view; F, face of female; G, habitus of female, dorsal view; H, habitus of female, lateral view; I, female genitalia, ventral view; J, first valvulae; K, second valvulae; L, apex of first valvulae; M, apex of second valvulae.

FIGURE 9. Metidiocerus impressifrons (Kirschbaum) A, male genital capsule, lateral view; B, connective, ventral view; C, connective, lateral view; D, aedeagus, lateral view; E, aedeagus, ventral view; F, style, lateral view.