Opsiini

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, Zootaxa 2607, pp. 55-68 : 57-58

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