Orbellis, Distant

Zámbó, András, Kovács, Szilvia & Kondorosy, Előd, 2023, Revision of the genus Orbellis Distant, 1913 (Heteroptera: Rhyparochromidae), Zootaxa 5389 (2), pp. 193-212 : 210-211

Key to Orbellis species

1. Length of entire body at least 8.50mm ..................................................................... 2

- Length of entire body smaller, between 4.80–7.50mm ........................................................ 3

2. Posterior lobe of pronotum anteriorly brown, with gradual transition to posterior yellow half; hemelytra brown, with large yellow spot in apical quarter and a smaller yellow lateral spot reaching R+M at half length. Slightly smaller (8.5mm)........................................................................... maculosus ( Slater & O’Donnell, 1999)

- Posterior lobe of pronotum with fuscous spots except nigriapicalis , never widely yellow; coloration of corium not as above. At least 9.0mm.......................................................................................... 4

3. Posterior pronotal lobe densely punctate with coarse and deep punctures, body dorsally pale with only submedian basal spots of pronotum fuscous, hemelytra almost unicolorous yellowish brown (only veins with a few short white sections)........................................................................ madagascariensis ( Slater & O’Donnell, 1999)

- Posterior pronotal lobe densely punctate with rather fine punctures, body rather dark and variegated, veins of hemelytra mostly pale.............................................................. longirostris Zámbó & Kondorosy , sp. nov.

4. Hemelytra unicolorous pale yellow without spots........................... flavescens Zámbó & Kondorosy , sp. nov.

- Hemelytra with variably developed spots.................................................................. 5

5. Apex of scutellum with conspicuous black spot, black coloration absent from other parts of body, pronotum without darker spots at posterior margin............................................. nigriapicalis Zámbó & Kondorosy , sp. nov.

- Apex of scutellum seldom black (in this case pronotum and mostly corium with black spots as well); pronotum and mostly corium with blackish (or dark) spots; pronotum near posterior margin with wavy dark band or spots mostly reaching humeral angles.............................................................................................. 6

6. Scutellum unicolorous (apex slightly darker); corium with oblique dark band from apex of scutellum subparallel to apical margin of corium; metafemora dark in apical half............................ guilberti Zámbó & Kondorosy , sp. nov.

- Apex or base of scutellum darker, corium with separate (often partly black) spots from apex of scutellum subparallel to apical margin of corium; metafemora not or inconspicuously darker in apical half. Females of these species hardly separable, often not at all............................................................................................ 7

7. Lateral margin of pronotum with slight concavity at level of transverse impression; apex of scutellum with small black spot (exceptionally missing), lateral margin not paler than disk of scutellum. Posterior pronotal margin pale mostly with fuscous spots, no big contrast between with enormous corial macula and the remainder of hemelytra................................................................................................. polhemi ( Slater & O’Donnell, 1999)

- Lateral margin of pronotum straight or convex (exceptionally slightly concave); scutellum with dark median at least in apical half (often connected with dark basal spot), lateral margin of apical half and very apex yellow (features in following couplets are characteristic mostly but only males can be separated with certainty).......................................... 8

8. Lateral pronotal margin slightly concave, veins of membrane concolorous, apex pale. Metatibiae of males straight, tubercles of male metafemora tiny; pygophore lacking a projection........................................ typicus Distant, 1913

- Either lateral pronotal margin slightly convex and membrane with darker veins or metatibiae of males subbasally curved, tubercles of male metafemora tooth-like, large; pygophore with apical projection................................... 9

9. Labium relatively long (labium of males attaining at least posterior margin of abdominal sternite III, labium of females often reaching middle of abdominal sternite IV), lateral pronotal margin slightly convex (sometimes straight), hemelytra pale with only blurred spots, membrane mostly not covered abdominal tergite VII and metatibiae of both sexes straight. Metatibiae of males straight, tubercles of male metafemora tiny; pygophore lacking a projection.................................................................................................... odonnellae Zámbó & Kondorosy , sp. nov.

- Labium somewhat shorter (never reaching beyond abdominal sternite III), lateral pronotal margin mostly straight (sometimes slightly convex), hemelytra vividly coloured with well developed spots, membrane mostly reaching apex of abdomen (submacropterous specimens rare) and metatibiae of males conspicuously curved at least in basal half. Metatibiae of males subbasally curved, tubercles of male metafemora tooth-like, large; pygophore with apical projection.................. 10

10. Dark median part of scutellum in posterior half evenly narrow, not wider than scape; metatibiae of males with 1–3 spur-like teeth present next to stiff setae, one of them rather large and curved outwards; apical projection of pygophore long and narrow (at least 5 times longer than thick)....................................... calcaratus Zámbó & Kondorosy , sp. nov.

- Dark part of scutellum triangular, parallel with lateral margins, much wider than scape; metatibiae of males armed with several strong teeth but none of them spur-like; apical projection of pygophore very thick and hardly longer than thick.......................................................................... dentifemoralis Zámbó & Kondorosy , sp. nov.