Opsiini
Creators: name: Dai, Wu
name: Cui, Wei
name: Xiao, Bin
name: Zhang, Yalin
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Cicadellidae

description: 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
description: Published as part of Dai, Wu, Cui, Wei, Xiao, Bin & Zhang, Yalin, 2010, A new genus and species of Old World Opsiini (Hemiptera: Cicadellidae: Deltocephalinae), with a key to genera and species checklist for the tribe, pp. 55-68 in Zootaxa 2607 on pages 57-58, DOI: 10.5281/zenodo.197725