Igutettix Matsumura, 1932

Ohara, Naomichi & Hayashi, Masami, 2022, Recognition of the genera Igutettix Matsumura and Vilbasteana Anufriev (Hemiptera: Cicadellidae: Typhlocybinae), with discovery of a new related genus from Japan, Zootaxa 5125 (1), pp. 63-74 : 64

Igutettix Matsumura, 1932

Igutettix Matsumura, 1932 , Ins. Mats., 6: 105 [Type species: Igutettix pulverosus Matsumura, 1932 ].

Vikabara Dworakowska, 1993 , Entomol. Abhandl. Staatl. Mus. Tierk. Dresden, 55: 117 [Type species: Vikabara atra Dworakowska, 1993 ]. syn. nov.

Body comparatively flattened. Head slightly narrower than pronotum, with crown strongly produced and angulated anteriorly, with coronal suture short, distinct basally; face almost as long as width, with frontoclypeus swollen; antennal ledge developed; ocelli absent. Pronotum large, more than 1.5 times as long as mesonotum; pronotum and mesonotum convex, forming two humps in lateral view; mesonotum concave along scutellar suture. Fore wing with cross vein r-m at base of 2 nd apical cell, veins RP and MP’ arising from r cell, and vein MP”+CuA’ arising from m cell; 1 st apical cell elongate, more than twice as long as wide; 2 nd apical cell truncated basally, with base narrower than base of 3 rd apical cell; 3 rd apical cell uniform in width, straight or slightly curved, with basal vein MP” shorter than CuA’; 4 th apical cell with basal vein CuA” as long as CuA’. Hind wing broadly rounded apicad; vein RP fused to MP’ in apical ¼; vein CuA branched more apically than point confluent with MP”; vein AA+AP’ branched. Male abdominal sternal apodemes well developed, extending beyond anterior margin of 5 th sternite; female 7 th sternite large with posterior margin deeply incised.

Male genitalia. Pygofer large with lobe rounded, with dorsal process large or small. Subgenital plates united to valve, large and fused to each other basally; plate bearing macrosetae laterally in basal half and not differentiated to marginal and submarginal microsetae apically. Style slender and recurved, with posterior portion about twice as long as basal apodeme, slightly bent inward apically. Connective longer than wide, Y-shaped. Aedeagus large and compressed, with preatrium distinct; shaft with ventral process long; gonopore apical.

Distribution. Japan, Taiwan.

Remarks. The misidentification by Dworakowska (1993b) resulted in the previous synonymies of this genus with Vilbasteana Anufriev, 1970 and Paraafrakra Chiang, Hsu et Knight, 1990 . The true Igutettix is characterized by the following features: comparatively large body size; 7 th abdominal sternite of female large; subgenital plates of male genitalia fused to each other basally and together to valve; style slender, with apex curved inward; aedeagus large and compressed, with preatrium and ventral process of shaft well developed. These characters are shared with Vikabara Dworakowska, 1993 from Taiwan, and accordingly, Vikabara is newly synonymized under Igutettix . As a result, this genus comprises three species from Japan and Taiwan, I. pulverosus Matsumura, 1932 sp. rev., I. ater (Dwrakowska, 1993) comb. nov. and I. glossatus (Dworakowska, 1993) comb. nov.