Isometopinae, Fieber, 1860

Akingbohungbe, A. E., 2012, Two new species of Isometopus Fieber (Hemiptera: Heteroptera: Miridae: Isometopinae) and a key to all known species of the genus in Europe and the Middle-East, Zootaxa 3175 (1), pp. 45-53 : 51-52

Key to the species of Isometopinae as known in Europe and the Middle East

1. Male................................................................................................ 2

- Female............................................................................................. 13

2. Apical frontal margin finely carinate or marginate, more or less confluent with tylus and juga which are broadly visible in front ( figure 2). Hemelytra mostly glassy hyaline or at least with broad glassy hyaline bands.............................. 3

- Apical frontal margin strongly carinate, distinctly cut off and raised over base of tylus and juga which are either strongly deflexed or depressed ( figure 6 ); if not, hemelytra distinctly opaque and frons ivory-white with contrasting dark punctures.. 5

3. Ocellus width equal to interocellar space; frons rugose punctuate........................................ yemenensis

- Interocellar space at least 1.6x as broad as each ocellus; frons practically impunctate................................4

4. Ocelli whitish translucent, about 3.3x width of each apart; mesoscutum punctate; rostrum largely yellow-brown, reaching as far back as seventh abdominal sternite............................................................. carinifrons

- Ocelli together with surrounding annuli dark-red, about 1.6x width of each apart; mesoscutum impunctate; rostrum largely dark reddish-brown to black, reaching as far back as fourth abdominal sternite.......................... gharaati n. sp.

5. Interocellar space equal to ocellus width................................................................... 6

- Interocellar space at least 1.3x as broad as ocellus............................................................ 7

6. Head in front about 1.3x as broad as high; antennal segment III dark brown; cuneus pale yellow with apical mesal dark brown band........................................................................................ longirostris

- Head in front about 1.5x as broad as high; antennal segment III dark-red with pale basal and apical extremities; cuneus unicolourous reddish-brown....................................................................... .. vanharteni

7. Interocellar space more than 2x as broad as ocellus........................................................... 8

- Interocellar space less that 2x as broad as ocellus........................................................... 10

8. Head in front about 1.5x as broad as high; frons at level of ventral margin of eyes with ivory-white transverse stripes separated by distinct punctate grooves.................................................................... taeniaticeps

- Head in front less than 1.5x as broad as high; frons devoid of distinct ivory-white transverse stripes as indicated above..... 9

9. Head from above rather strongly appressed, over 5x as broad as long; pronotum more than 3x as broad as long..... intrusus

- Head from above less strongly appressed, about 4x as broad as long or less; pronotum less than 3x as broad as long..................................................................................................... diversiceps

10. Head in front 1.2x as broad as high; dorsum largely pale testaceous to ivory-white with broad blue-black blotches and bands............................................................................................... mirificus

- Head in front at least 1.3x as broad as high; dorsum either piceous to blackish or deep yellow to golden suffused with reddish ................................................................................................... 11

11. Dorsum deep yellow to golden suffused with reddish; head in front about 1.32x as broad as high............... peregrinus

- Dorsum piceous to blackish; head in front about 1.48x as broad as high.......................................... 12

12. Membrane of hemelytra densely microhairy, biareolate; gena relatively low, less than 0.1x as high as eye......... nigritulus

- Membrane of hemelytra glabrous, uniareolate; gena relatively higher, 0.2x as high as eye............. praetermissum n. sp.

13. Head distinctly inclined forwards with frons broadly visible from above; pronotum strongly explanate laterally, anterior humeral angles prominently projected forwards so anterior margin forms distinct concavity around head.............. 14

- Head distinctly vertical with frons barely visible from above; pronotum only finely explanate laterally; if strongly explanate, anterior humeral angles not or only weakly projected forwards so anterior margin is straight to weakly concave........... ................................................................................................... 22

14. Apical frontal margin strongly projected ventrad, forming flange-like hood over strongly depressed tylus and juga......... ................................................................................................... 15

- Apical frontal margin not projected ventrad, not forming flange-like hood over tylus and juga which are only deflexed but not strongly depressed................................................................................... 21

15. Frons at the level of ventral eye margins with at least three distinct ivory-white transverse stripes separated by dark punctate grooves............................................................................................ 16

- Frons either devoid of the above transverse stripes or at best with a weakly defined pair............................. 20

16. Genae widely flanged laterally, distinctly bulging beyond eyes; antennal segment I pale................... quadrifasciatus

- Genae not or only weakly flanged laterally beyond eyes; antennal segment I dark-red............................... 17

17. Rostrum reaching as far back as second abdominal sternite; frons with four triangular to rectangular ocelloid impressed spots............................................................................................. .. frontalis

- Rostrum longer, reaching at least to fourth abdominal sternite; frons devoid of the above ocelloid impressed spots........ 18

18. Interocellar space about 5x as broad as ocellus..................................................... .. taeniaticeps

- Interocellar space less than 4x as broad as ocellus........................................................... 19

19. Head in front about 1.4x as broad as high; interocellar space about 3.5x width of ocellus. Cuneus distinctly punctate ..................................................................................................... nigritulus

- Head in front about 1.2–1.26x as broad as high; interocellar space about 2.0–2.5x width of ocellus. Cuneus impunctate......................................................................................... praetermissum n. sp.

20. Hemelytra largely dark reddish-brown with contrasting whitish v-shaped marking on disk; frons at apex with two pairs of irregularly-shaped black impressed markings separated by shallow punctate groove......................... diversiceps

- Hemelytra either largely yellow-brown with reddish tinge, or dark reddish-brown but devoid of any contrasting whitish vshaped marking on disk. Frons not as above........................................................... intrusus

21. Head, pronotum, and cuneus uniformly black......................................................... sepehrii

- Head, pronotum, and cuneus largely pale to yellowish ochraceous.............................................. 23

22. Interocellar space about 4x as broad as ocellus; antennal segment II about 1.6x as long as segment III. Dorsum with more extensive dark markings than whitish............................................................... kaznakovi

- Interocellar space about 2.5x as broad as ocellus; antennal segment II relatively shorter, about 1.5x as long as segment III. Dorsum with more extensive whitish than dark markings................................................... mirificus

23. Dorsum dark reddish-brown with four broad strongly contrasting ivory-white vittae on the hemelytra. Scutellum similarly with broad lateral whitish vittae conjoined apically..................................................... quadrivittatus

- Dorsum dark reddish-brown with broad rather irregular pale to ivory-whitish transverse band across hemelytra and scutellum.......................................................................................... gharaati n. sp.

Figures

FIGURES 6–7. Isometopus praetermissum sp. nov. male habitus; dorsal view of head.