Coridromius

Tatarnic, N. J. & Cassis, G., 2008, Revision Of The Plant Bug Genus Coridromius Signoret (Insecta: Heteroptera: Miridae), Bulletin of the American Museum of Natural History 2008 (315), pp. 1-95 : 25-27

KEY TO SPECIES OF CORIDROMIUS

1. Proepisternum bilobed (figs. 3C, 18A); metanotum prominent and flared (fig. 16C–D) 2

– Proepisternum unilobed (figs. 3C, 13C); metanotum not prominent and flared (fig. 13D).......................... 17

2. Metepimeron punctate (figs. 13A, 16G, 19A– B); right paramere club-shaped with short, rounded process, appearing U-shaped from above (figs. 10B–D, 10F–H, 15E–F, 17B– D, 17I–K, 17T–U)................. 3

– Metepimeron impunctate (figs. 8E, 9E–F, 11G, 13E, 14B, 18C, H, 19G); right paramere not club-shaped, not appearing U-shaped when viewed from above............ 6

3. Costal margin of hemelytron straight and weakly carinate (fig. 5: sommelieri , testaceous , zetteli )......................... 4

– Costal margin of hemelytron weakly to strongly flared posteriorly (fig. 4: crassus , declivipennis , falsicoleus ; fig. 5: nakatanii , pteraulos )....................... 11

4. Male left paramere tightly corkscrewed (figs. 17H, 17S, 19E–F, 21D); female possibly with corkscrewed paragenital opening on right side of abdomen (fig. 19B–C)..... 5

– Known only from females, female without any visible paragenitalia; male suspected to not have corkscrewed left paramere (South China, Laos, Nepal, Sumatra, Vietnam).. testaceous

5. Apex of male left paramere perpendicular to its axis, pygophore with triangular ventral apical process (figs. 17H, 19D–F); female with corkscrewed paragenital opening on right side of body (figs. 19B–C, 20B) (Sabah)..................... sommelieri

– Apex of male left paramere almost parallel to its axis (figs. 17S, 21D); pygophore without apical process (fig. 21D); female unknown (South China, Laos, Vietnam)..... zetteli

6. Dorsum with mottled cream and brown coloration (figs. 1D, 4: chinensis , confusus ; fig. 5: marmoreus , minusculus , punctatus ).... 7

– Not with mottled cream and brown coloration........................... 15

7. Both lobes of proepisternum of equal length (e.g., fig. 18A); lateral margins of pronotum and hemelytra without brown spots; right paramere rounded with long, sharp, triangular apical process (figs. 7O–P, 7R–S, 9A, 12N–O, 18D–E) .................. 8

– Anterior lobe of proepisternum shorter than posterior lobe (fig. 14A); lateral margins of pronotum and hemelytra marked with small brown spots (fig. 5: marmoreus ); right paramere without sharp, triangular apical process (fig. 12K–L) ( Philippines)...... marmoreus

8. Apex of scutellum greatly swollen and rounded (figs. 1D, 4: chinensis 1, chinensis 2); AII without dark brown postmedial band (figs. 1D, 4: chinensis ); gutter of left paramere open over entire length (figs. 7N, 9A) ( India, Nepal, South China, Laos, Brunei, Japan, Taiwan, Vietnam)............ chinensis

– Apex of scutellum only slightly swollen (fig. 4: confusus ; fig. 5: minusculus , punctatus ); AII with dark brown postmedial band; left paramere either entirely open or closed until apex........................... 9

9. AI dark brown with pale base and apex; AIII and AIV entirely dark brown; left paramere open over entire length (fig. 17E) ( Papua New Guinea)............... punctatus

– AI pale with broad, dark brown annulation; AIII and AIV dark brown, yellowish white basally; left paramere open or closed.... 10

10. Left paramere a thin, closed tube, open at apex (figs. 9G–H, 7Q) (Sulawesi, Solomon Islands)................... confusus

– Left paramere open over entire length (fig. 12M) (Irian Jaya and Papua New Guinea).................. minusculus

11. Costal margin of hemelytron weakly flared posteriorly (fig. 4: declivipennis , falsicoleus , fig. 5: pteraulos ).................. 12

– Costal margin of hemelytron strongly flared posteriorly (fig. 4: crassus ; fig. 5: nakatanii )............................ 14

12. Body dark brown with yellow-orange markings (fig. 4: falsicoleus ), female with prominent paragenital opening on right side of abdominal sternite II (figs. 20A–B); male unknown ( India, Sabah)...... falsicoleus

– Body color variable, not as above; female without prominent paragenital opening on right side of body................. 13

13. Posterolateral flaring of hemelytron rounded (fig. 5: pteraulos ); anterolateral margin of hemelytron on female strongly recurved, forming a distinct gutter (figs. 3D, 16H); left posterior ventral margins of male abdominal segments VII and VIII with patch of strong, caudally directed bristlelike setae (fig. 16E–F) ( Papua New Guinea, Sabah).... pteraulos

– Posterolateral flaring of hemelytra angular (fig. 4: declivipennis ); anterolateral margin of hemelytra on female not forming a curved tube; patch of setae on male abdominal segments VII and VIII much less distinct than in pteraulos ( Japan) ..... declivipennis

14. Dark brown apical annulation on AII separated from postmedial dark brown band by thin white annulation (fig. 5: nakatanii ); left paramere long, thin, and enclosed until apex (figs. 14E–F, 15D), female with prominent paragenital opening on right side within abdominal sternite II ( Laos, Vietnam)............................. nakatanii

– AII with dark brown apical annulation and subapical whiteannulation, but no dark postmedial band (fig. 4: crassus ); left paramere thick and relatively long, not enclosed until apex (fig. 10A) (North Sulawesi)... crassus

15. Body small, brown, and punctate; posterior margin of embolium strongly flared outward, cuneal fracture deep (fig. 4: lestoni ); dorsolateral margins of abdomen grooved ( Ghana)......................... lestoni

– Uniform brownish yellow with two large dark brown spots on scutellum (fig. 4: bulbopella ; fig. 5: ruwenzorii ); posterior margin of vertex broadly rounded (fig. 6)............. 16

16. Head smooth and impunctate; female and male with ‘‘cup and bulb’’ structure on right abdominal tergites II and III, hidden by hemelytra (fig. 8C–D); male left paramere long and thin with single twist at base (fig. 8F) ( South Africa, Kenya, Tanzania).......................... bulbopella

– Head smooth and weakly punctate; female with small lobed projection on right abdominal tergites II and III, hidden by hemelytra (fig. 18F–G); male unknown ( Uganda)............................ ruwenzorii

17. Anterolateral margins of pronotum projecting as rounded lobes, uniform brownish

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22. yellow with two dark brown spots on scutellum (fig. 4: boianotum ); posterior margin of pygophore weakly bisinuate, without deep groove, fold, or suture on left side (fig. 8B) ( Solomon Islands, Vanuatu)....

......................... boianotum Anterolateral margins of pronotum not projecting as rounded lobes; coloration variable; posterior margin of pygophore with or without groove, fold or mesal suture on left side........................... 18 Pronotum campanulate, much wider posteriorly; deeply punctate; anterior of humeral angles projecting forward; brownish yellow (fig. 4: carinatus ) ( Palau)....... carinatus Pronotum not campanulate; anterior of humeral angles not projecting forward; coloration and texture variable.......... 19 Light tan in coloration, with paired dark brown spots on pronotum behind eyes, on pronotal disc, and on scutellum, hemelytra with brown transverse chevron pattern (fig. 5: neoguineanus ); head with irregular dark brown band on clypeus, sometimes extending upward onto frons, middle of vertex with a single dark brown spot, frons without vittae (fig. 6: neoguineanus ); right paramere bootshaped (fig. 15H–I); posterior margin of pygophore with deep U-shaped groove right of centre (fig. 14G–H) ( Papua New Guinea, Irian Jaya).............. neoguineanus Coloration not as above; right paramere triangulate; groove or fold on left posterior margin of pygophore............... 20 Hemelytra always with dark brown ‘‘Y’’ along inner margin of clavus (fig. 5: tahitiensis 3, tahitiensis ♀); left margin of pygophore with a deep U-shaped groove (fig. 19H); female with prominent intersegmental paragenital opening on right side of abdomen between segments II and III (figs. 26G, 27C) (Tahiti)................... tahitiensis Hemelytra without dark brown ‘‘Y’’ pattern along inner margin of clavus; folded groove on posterior margin of pygophore deep or shallow; female without paragenitalia as in tahitiensis ....................... 21 Metepimeron extended posteriorly as a long winglike lobe (figs. 11G, 13E); costal margin of hemelytron flared anteriorly, abruptly angled inward at midpoint (figs. 4: epithema , hermosus , 5: nigrus , prolixipenis )....... 22 Metepimeron truncate or only slightly lobed; lateral margin of embolium not shaped as above.......................... 25 Head with contrasting dark brown or black coloration above and yellow below, beginning at base of clypeus; yellow piping along

posterior margin of vertex and adjacent to eyes (fig. 6: hermosus , prolixipenis )..... 23

– Head not colored dark above and yellow below; with or without yellow piping... 24

23. Body orange-brown with two conspicuous black markings on anterior portion of pronotum, scutellum often bright orange (fig. 4: hermosus ); head black above, yellow below (fig. 6: hermosus ); metepimeron extended as a long, triangular lobe (fig. 13E); male left paramere thick and relatively long (figs. 12D, 13G); posterior margin of pygophore with broad ventral apical process (fig. 13H); right dorsal laterotergites II and III of female swollen and desclerotized (fig. 13D–F) ( Papua New Guinea)............ hermosus

– Body dark reddish brown above (fig. 5: prolixipenis ); head dark reddish brown above and yellow below, with yellow piping (fig. 6: prolixipenis ); fore- and middle legs yellow basally, hindlegs uniform dark reddishbrown; left paramere extremely long and thin (fig. 15M–N); posterior margin of pygophore without ventral apical process (fig. 15N); female unknown ( Papua New Guinea)........................... prolixipenis

24. Body uniformly dark reddish brown to black with faint orange piping along margins of pronotum (fig. 5: nigrus ); posterior margin of head, outer ocular margins and mandibular plates yellow-orange (fig. 6: nigrus ); metafemur uniformly dark; metepimeron extended as a long, triangular lobe (as in fig. 13E); right abdominal laterotergites II and III of female swollen and desclerotized (as in fig. 13D–F); male unknown ( Papua New Guinea)..................... nigrus

– Body uniformly orange-brown (fig. 4: epithema ); head and pronotum with faint orange piping (fig. 6: epithema ); metafemur uniformly dark, metepimeral lobe extremely long and apically rounded (fig. 11G); right abdominal laterotergites II and III of female swollen, membranous and saddle-shaped (fig. 11G–H); male unknown ( Papua New Guinea)................... epithema

25. Body uniformly dark brown (fig. 5: thalame ) with orange-yellow legs and head (fig. 6: thalame ); right abdominal segment II of female irregularly swollen, conspicuous paragenital opening between segments II and III (fig. 21A); male unknown (Sabah)................................ thalame

– Body not uniformly dark brown; female without paragenitalia as in thalame ..... 26

26. Body nearly uniform brownish orange (fig. 4: drepanopenis ) ; left paramere extremely long and thin (figs. 10I, 10K); posterior margin of pygophore with folded groove (fig. 10K); female unknown (Sabah).... drepanopenis

– Body not colored as above; left paramere not extremely long and thin; groove on pygophore variable.................... 27

27. Dorsolateral margin of abdominal segment II of females extremely swollen, with laterally projecting tumescence at posterior margin of segment (fig. 11B–D); male with relatively long and thick left paramere (figs. 11E–F, 12A); left posterior margin of pygophore with shallow depression ( Philippines).. ephippius

– Females without visible external paragenitalia; right posterior margin of pygophore with distinct folded groove.............. 28

28. Posterior margin of metepimeron with small but distinct rounded lobe projecting from upper corner (as in fig. 14B); folded groove on posterior margin of pygophore shallow (fig. 21B–C) ( New Caledonia, Fiji) variegatus

– Posterior margin of metepimeron truncate; folded groove in pygophore shallow (fig. 21D) or deep (figs. 8H, 16A)...... 29

29. Body broad, generally light brown in color with darker brown markings (fig. 5: monotocopsis ); pygophore with shallow folded groove (fig. 14D); left paramere marginally longer than in other Australian species (fig. 15A); found primarily on Monotoca elliptica (eastern Australia)... monotocopsis

– Body broad or narrow, either large and orange-brown with brown and yellow markings (fig. 5: pilbarensis ) or small, ranging from almost black to olive in coloration (figs. 2B–C, 4: chenopoderis 1, chenopoderis 2); folded groove on pygophore deep (figs. 8H, 16A)................... 30

30. Body large and broad, orange-brown with brown and yellow markings (fig. 5: pilbarensis ); pygophore with small tubercle to right of deep, folded groove (fig. 16A–B) ( Australia)...................... pilbarensis

– Body small and narrow, coloration varying from almost black to olive or light brown (figs. 2B–C, 4: chenopoderis 1, chenopoderis 2); folded groove on pygophore deep, without small tubercle on right side (fig. 8H); found primarily on Chenopodiaceae ( Australia, New Zealand, Norfolk Island, Mexico, Arizona California, Florida, Hawaii, New Mexico, Texas).............. chenopoderis