A new genus and species of Old World Opsiini (Hemiptera: Cicadellidae: Deltocephalinae), with a key to genera and species checklist for the tribe Author Dai, Wu Author Cui, Wei Author Xiao, Bin Author Zhang, Yalin text Zootaxa 2010 2607 55 68 journal article 10.5281/zenodo.197725 35fb4fa7-7ef1-409e-9c52-2d1832fb885e 1175-5326 197725 Key to genera of the tribe Opsiini (males) (Compiled based on literature including generic description and modified from Emeljanov (1999) and Dmitriev (2002)) 1 Subgenital plates with a row of macrosetae; genital valve not enlarged ...................................................................... 2 - Subgenital plates without macrosetae; genital valve large ......................................................................................... 20 2 Mesal margin of eye notched; single T-branched shaft arising from base of aedeagus, with shaft branches forming semicircle (Circuliferina) .............................................................................................................................................. 3 - Mesal margin of eye not notched; aedeagal shafts arising from base separately (Opsiina) ......................................... 5 3 Aedeagal shafts rounded in cross section. Gonopores apical ....................................................................................... 4 - Aedeagal shafts flattened. Gonopores subapical .......................................................................... Pedarium Emeljanov 4 Vertex convex, boundary between face and vertex smooth ............................................................. Neoaliturus Distant - Vertex concave, edge between face and vertex distinct ................................................................... Concavifer Dlabola 5 Vertex longer medially than next eye ........................................................................................................................... 6 - Vertex of uniform length ......................................................................................................................... Cestius Distant 6 Pygofer with paired inner processes arising dorsally ..................................................................... Lampridius Distant - Pygofer without paired inner processes ........................................................................................................................ 7 7 Subgenital plate with additional lateral plate at base ......................................................................... Alishania Vilbaste - Subgenital plate without additional lateral plate at base............................................................................................... 8 8 Forewings with a triangular marble pattern forming in the middle a darker rhomboidal spot when wings at rest ........ ....................................................................................................................................................... Hishimonus Ishihara - Forewings without triangular marble pattern forming in the middle a darker rhomboidal spot when wings at rest ... 9 9 Aedeagus with atrium extending ventrad of shafts..................................................................................................... 10 - Aedeagus with atrium not extending ventrad of shaft ................................................................................................ 12 10 Aedeagal atrium terminating ventrally in elongate posteriorly directed processes .................................................... 11 - Aedeagal atrium without processes ........................................................................................................ Naevus Knight 11 Aedeagal with unpaired ventral process bifurcate in apical half ................................................. Libengaia Linnavuori - Aedeagal with a pair of ventral processes ............................................................................................... Litura Knight 12 Aedeagus without basal process ................................................................................................................................. 13 - Aedeagus with basal process ...................................................................................................................................... 14 13 Pronotum and forewing with dark-brown filigranous stripes ................................................................ Orosius Distant - Pronotum and forewing without dark-brown filigranous stripes .............................................................. Nesophrosyne 14 Basal processes of aedeagus arising from socle ......................................................................................................... 15 - Basal processes of aedeagus arising from inner margin of shaft....................................................... Introrsa gen. nov. 15 Aedeagus with unpaired ventral process at base ............................................................................... Norva Emeljanov - Aedeagus with pair of ventral processes at base......................................................................................................... 16 16 Aedeagus with 2 pairs of basal processes. Process of pygophore serrate ventrally ................. Hishimonoides Ishihara - Aedeagus with a pair of basal processes. Pygophore without process ....................................................................... 17 17 Aedeagal socle swollen and bulbous ....................................................................................................... Opsius Fieber - Aedeagal socle not swollen......................................................................................................................................... 18 18 Aedeagus with pair of basal processes arising between aedeagal shaft; gonopores large, far from apex; phragma forming two large, rectangular plates ............................................................................................ Satsumanus Ishihara - Aedeagus with pair of basal processes arising below aedeagal shaft; gonopores small, apical ................................. 19 19 Apophysis of style elongate .......................................................................................................... Opsianus Linnavuori - Apophysis of style not elongate...................................................................................................... Aladzoa Linnavuori 20 Macropterous; male genital valve longer than wide, parabolic or lanceolate-parabolic; lobe of pygofer with ventral pointed process (Eremophlepsiina)............................................................................................................................. 21 - Brachypterous, forewings truncate caudally; male genital valve wider than long; lobes of pygofer without ventral processes (Achaeticina)............................................................................................................................................... 22 21 Genital plate with digitiform, soft, elongate apex. Apex of style digitiform, not dilated............................................... .......................................................................................................................................... Pseudophlepsius Zachvatkin - Genital plate with short sclerotized apex somewhat projecting beyond valve apex. Apex of style flattened and hatchet-like, dilated ............................................................................................................ Eremophlepsius Zachvatkin 22 Pronotum with lateral carinae. Apex of vertex angularly projecting forward; vertex edge sharp, lamelliform. Apex of postclypeus with thick longitudinal carina ............................................................................... Chlidochrus Emeljanov - Pronotum without lateral carinae. Boundary between vertex and face smooth or, if slightly depressed, marked by weak carina ................................................................................................................................................................. 23 23 Apex of anteclypeus convex ....................................................................................................................................... 24 - Apex of anteclypeus with deep emargination ................................................................................... Diacra Emeljanov 24 Pygophore not produced ............................................................................................................... Achaetica Emeljanov - Pygophore with blunt projection below anal tube .......................................................................... Zapycna Emeljanov