Gergithus
Creators: name: Meng, Rui
name: Wang, Yinglun
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Issidae
Gergithus

description: Key to species of Gergithus
1. Frons with stripes or spots............................................................................... 2
-. Frons without stripes or spots........................................................................... 37
2. Frons without transverse bands........................................................................... 3
-. Frons with transverse bands............................................................................ 22
3. Frons with two spots................................................................................... 4
-. Frons with longitudinal stripes........................................................................... 6
4. Frons with two spots near vertex.......................................................................... 5
-. Frons with two spots near frontoclypeal suture; tegmina shiny brown, translucent. Burma ............. G. ignotus Melichar
5. Clypeus with two longitudinal stripes; tegmina dirty yellow, costal margin brown, at apical third with a pale yellow mark, veins pale green. China (Taiwan)..................................................... G. pendulu s Chan & Yang
-. Clypeus without such stripes; tegmina dark reddish brown, margin reddish brown. China (Taiwan), Japan (Honshu, Shikoku and Kyushu)...................................................................... G. carbonarius Melichar
6. Frons with a central red longitudinal fascia................................................................. 7
-. Frons with two longitudinal fasciae...................................................................... 15
7. Frons with a very broad central fascia..................................................................... 8
-. Frons with moderately broad central fascia................................................................ 10
8. Tegmina without fasciae................................................................................ 9
-. Tegmina black with a sublateral fascia terminating at a little before apex on inner margin, a broader central transverse fascia, from which there posteriorly bifurcates a short oblique fascia to suture; frons somewhat narrow; clypeus with two red fasciae. India (Madras)...................................................................... G. nilgiriensis (Distant)
9. Clypeus yellow; tegmina brownish-yellow to pitch-brown. India (Madras)........................ G. vi d ul us (Melichar)
-. Clypeus centrally pale virescent, with narrow submarginal fascia; tegmina thickly finely pilose. India (Madras, southern area)....................................................................................... G. erebus Distant
10. Tegmina with fasciae, spots or irregular marks.............................................................. 11
-. Tegmina without such marks, venation reticulate........................................................... 13
11. Clypeus green with submarginal sanguineous lines; tegmina with the disc suffused with black, apical area paler, extreme mar- gin and a submarginal narrow line black. India (southern area, Madras)............................. G. proteus Distant
-. Clypeus without such lines............................................................................. 12
12. Generally sordidly flavescent; frons dirty green; tegmina dirty green or brownish-yellow to brown with anterior costal margin black, a small black spots and two submedian subcurved oblique flavous lines. Sri Lanka ................ G. schaumi Stål
-. Generally very pale flavescent; tegmina with about posterior third tawny-grey inwardly margined with umber-brown, with an oblique piceous fascia. India (Madras).................................................... G. elongates (Distant)
13. Clypeus with longitudinal fasciae........................................................................ 14
-. Clypeus black; frons green; tegmina dirty green, translucent, oblong. Australia (Key Island)........... G. pigrans Melichar
14. Clypeus with two longitudinal fasciae testaceous; frons with lateral margins testaceous; tegmina pale ochraceous with the venation very dense and somewhat closely reticulate. India (Madras)............................ G. reticulates (Distant)
-. Clypeus with one longitudinal fasciae red; frons and clypeus black with lateral margins broadly yellowish white; tegmina black with network of veins at base and yellowish apex. Malaysia (Sarawak, Malacca, Malaya), Indonesia (Java, Nias Island, Suma- tra), Borneo, Thailand ..................................................................... G. n i ger (Walker)
15. Tegmina with fasciae spots............................................................................. 16
-. Tegmina subhyaline, without marks, venation somewhat reticulate. China (Taiwan)............. G. horishanus Matsumura
16. Frons with two black longitudinal fasciae.................................................................. 17
-. Frons with two red or castaneous longitudinal fasciae........................................................ 18
17. Frons with two parallel black lines, and separated by a yellowish stripe; tegmina green, finely punctured, base of costa with two parallel rufous-brown lines, and a very narrow yellowish edging continued round the rest of the tegmina. Sri Lanka ....................................................................................... G. herbaceus (Distant)
-. Frons with lateral margins flavescent, sublateral margins black, central fascia red, its disc finely transversely striate; tegmina with the veins reticulate, prominent distinctly, a broad curved piceous fascia connect with posterior margin by a short and straight fascia at middle. Burma (Tenasserim)................................................ G. v eno sus (Distant)
18. Mesonotum with longitudinal fascia...................................................................... 19
-. Mesonotum without any fascia.......................................................................... 21
19. Mesonotum opaline green with the anterior margin and central fascia testaceous................................... 20
-. Mesonotum with a central fascia and a small spot on each side; Tegmina much shaded and spotted with castaneous between the veins, but with a prominent pale spot on each tegmen near middle of inner margin and paler also on apical area. Sri Lanka ................................................................................... G. complicates Distant
20. Tegmina thickly finely punctuate, with black costal markings consisting of two basal streaks, followed by three spots, apical margin narrowly black. Sri Lanka ......................................................... G. versicolor Distant
description: Published as part of Meng, Rui & Wang, Yinglun, 2012, Two new species of the genus Gergithus Stål (Hemiptera: Fulgoromorpha: Issidae) from China, with a redescription of G. bimaculatus Zhang and Che, and G. tessellatus Matsumura, pp. 1-18 in Zootaxa 3247 on page 3, DOI: 10.5281/zenodo.211928