gonocerini

Brailovsky, Harry, 2007, A revision of the tribe Gonocerini from Australia (Hemiptera: Heteroptera: Coreidae: Coreinae), Zootaxa 1530, pp. 1-18 : 2

Key to the known australian gonocerini *

1. Costal margin of corium smooth, unserrated; space between each hind coxae 1 to 1.5 times diameter of one coxae; posteroventral edge of male genital capsule with prominent medial plate ( Figs. 17–18 ); head pentagonal, elongate (Figs.10,15) ................................................................................... Plinachtus Stål ... 2

1’. Costal margin of corium crenulate to serrate; space between each hind coxae less than 0.7 times diameter of one coxae; posteroventral edge of male genital capsule without median plate ( Fig. 20 ); head subquadrate, obliquely bent( Figs.11–14 ).................................................................................................................. 3

2. Humeral angle’s tapering into short acute spine ( Fig. 3); antennal segment I somewhat triquetral; antennal segment III narrowly elliptical and expanded ( Fig. 1); rostral segments I and II pale yellow, III and IV shiny orange; costal margin of corium with a pale yellow longitudinal stripe .................... P. melinus n. sp.

2’. Humeral angle’s projection remarkably large and acute ( Fig. 4); antennal segment I not triquetral; antennal segment III cylindrical, not apically expanded ( Fig. 2); rostral segment I yellow, II black with basal joint yellow, III–IV black; costal margin of corium without pale yellow longitudinal stripe ....................... ........................................................................................................................................... P. refulgens n. sp.

3. Posterior angles of connexival segments IV–V produced into short subacute projection; connexivum conspicuously raised above tergum; outer border of antenniferous tubercles always armed ( Fig. 11 )............... .................................................................................................................................. Cletomorpha Mayr ... 4

3’. Posterior angles of connexival segments obtuse, not produced; connexivum not conspicuously raised above tergum; outer border of antenniferous tubercles usually unarmed ..................................... Cletus Stål ..................................................................................................................................................................... 5

4. Total body length shorter than 6 mm; corium lacking transverse whitish callose band; humeral angle tapering into medium-sized acute spine ( Fig. 6 ) ............................................................... Cl. saphisa n. sp.

4’. Total body length larger than 8 mm; corium with wide transverse whitish callose band; humeral angle tapering into large acute spine ( Fig. 5 ) .................................................................... Cl. mackayensis Distant

5. Outer border of antenniferous tubercle armed with short acute spine; antennal segment IV fusiform, elongate; apical third of tibiae and tarsi shiny reddish; apical edge of corium lacking ivory to whitish discoidal spot; humeral angle tapering into large acute spine ( Fig. 8 ) .................................................. C. saucius Stål

5’. Outer border of antenniferous tubercle unarmed; antennal segment IV subclavate, shorter; apical third of tibiae and tarsi not shiny reddish; apical edge of corium with ivory to whitish discoidal spots; humeral angle obtuse or subacute or with medium-sized spine ( Figs. 7, 9 ).............................................................. 6

6. Humeral angle obtuse or tapering into short subacute spine ( Fig. 9 ); head and pronotum with wide black to reddish brown stripe, this usually reaching base of scutellum .......................................... C. similis Blöte

6’. Humeral angle tapering into medium-sized acute spine ( Fig. 7 ); head and pronotum with indistinct black stripe ................................................................................................................................... C. minutus Blöte

Figures

FIGURE 17 – 22. Male genital capsule in caudal view. 17 – 18. Plinachtus spp. 17. Plinachtus refulgens n. sp. 18. Plinachtus melinus n. sp. Figure 19. Cletomorpha mackayensis Distant. 20 – 22. Cletus spp. 20. Cletus similis Blöte. 21. Cletus minutus Blöte. 22. Cletus saucius Stål.

FIGURE 10 – 16. Head. 10 – 13. Dorsal view. 10. Plinachtus refulgens n. sp. 11. Cletomorpha mackayensis Distant. 12 – 13. Cletus spp. 12. Cletus saucius Stål. 13. Cletus similis Blöte. 14 – 16. Lateral view. 14. Cletus similis Blöte. 15. Plinachtus refulgens n. sp. 16. Cletomorpha mackayensis Distant.

FIGURE 5 – 9. Pronotum. 5 – 6. Cletomorpha spp. 5. Cletomorpha mackayensis Distant. 6. Cletomorpha saphisa n. sp. FIGURE 7 – 9. Cletus spp. 7. Cletus minutus Blöte. 8. Cletus saucius Stål. 9. Cletus similis Blöte.