Petalops, Amyot & Serville, 1843

Brailovsky, Harry, 2021, Illustrated key to the species included in the genus Petalops Amyot & Serville 1843 (Hemiptera: Heteroptera: Coreidae: Coreinae: Acanthocephalini), with description of four new species and new distributional notes, Zootaxa 4985 (4), pp. 564-573 : 572-573

Key to known species of Petalops

1 Antennal segments I–III black with or without basal joint of segments II–III pale yellow; antennal segment IV black with subbasal pale yellow ring or pale yellow with apical third black ( thoracicus group)................................... 2

- Antennal segments I–IV castaneous orange or pale yellowish orange ( distinguendus group).......................... 9

2 Antennal segment IV pale yellow with apical third black; hind femora yellow with two black rings, one near midline, the second at apex; anterior lobe of pronotal disk with yellow transverse band which spreads along anterolateral margins ( Fig. 8 )...................................................................................... P. thoracicus (Thunberg)

- Antennal segment IV black with subbasal yellow ring........................................................ 3

3 Hind femora bicolored................................................................................. 4

- Hind femora unicolored................................................................................ 5

4 Hind femora with anterior half black, and posterior half yellowish orange; head dorsally pale yellow with antenniferous tubercles black; head ventrally, thorax, abdominal sterna and genital plates entirely pale yellow ( Fig. 4 )...................................................................................................... P. bellator Brailovsky

- Hind femora with anterior half yellowish orange and posterior half black; head dorsally almost entirely black; head ventrally, thorax, abdominal sterna and genital plates almost black to reddish brown; pleural margin of abdominal sterna III–VII yellow with anterior third black ( Fig. 3 )....................................................... P. azureus (Burmeister)

5 Pronotal calli yellow to castaneous orange................................................................. 6

- Pronotal calli black with bluish green reflections............................................................ 7

6 Abdominal sterna III–VII orange to yellowish orange; dorsal abdominal segments III–IV and basal half of V black and apical half of V and VI–VII shiny orange ( Fig. 12 )................................................. P. fortunatus Dallas

- Abdominal sterna III–VI reddish brown to black with upper pleural margins yellow; dorsal abdominal segments III–VII black with scars of segments IV–V and V–VI yellow ( Fig. 11 ).................................... P. distinctus Montandon

7 Abdominal sterna III–VII black to reddish brown with pleural margins yellow; dorsal abdominal segments III–VII black with scars of segments IV–V and V–VI yellow ( Figs. 1 , 16 )..................................... P. napoensis Brailovsky

- Abdominal sterna III–VII pale yellow to pale yellowish orange; dorsal abdominal segments III–IV and basal half of V black and apical half of V and VI–VII shiny orange (posterior margin of VII black)..................................... 8

8 Thorax reddish orange with bluish green reflections; connexival segments III–VII pale yellowish orange; anterior and posterior lobes of metathoracic peritreme black ( Fig. 9 )............................................. P. ambiguus Brailovsky

- Thorax pale yellow with shiny dark brown longitudinal stripe running on outer face of sternum and covering pro-, meso-, and meta-acetabulae; connexival segments III–VII black with narrow vertical yellow stripe parallel to anterior margins of sternites; anterior and posterior lobes of metathoracic peritreme pale yellow ( Fig. 13 )......................... P. graziae sp. nov.

9 Hind femora bicolored or tricolored..................................................................... 10

- Hind femora unicolored.............................................................................. 13

10 Hind femora tricolored with basal half pale yellowish orange, posterior half shiny orange with distal joint and wide ring near midline back; head dorsally entirely pale castaneous orange ( Fig. 5 )................................ P. lautus sp. nov.

- Hind femora bicolored; head dorsally black with the space between eyes and ocelli and longitudinal stripe between ocelli pale to dark orange to yellowish orange...................................................................... 11

11 Hind femora with anterior half black and posterior half shiny orange with apex black ( Fig. 7 )....... P. occulta Brailovsky

- Hind femora with anterior half yellow and posterior half black............................................... 12

12 Pronotum pale castaneous orange with bluish green reflections ( Figs. 2 , 10 )................... P. distinguendus Breddin

- Pronotum brown with bluish green reflections and disk with yellow transverse band which spreads anteriorly along anterolateral margins ( Fig. 6 )................................................................... P. necopinus sp. nov.

13 Pronotal disk castaneous orange with bluish green reflections and wide transverse yellow or orange band running below calli ( Fig. 15 )..................................................................... P. luteomaculosus Brailovsky

- Pronotal disk pale orange or castaneous orange or reddish brown with bluish green reflections and without yellow or orange transverse band...................................................................................... 14

14 Dorsal abdominal segments III–VI pale orange, VII black with middle third of anterior margin pale orange and VIII–IX black; head dorsally pale orange; meta-acetabulae pale orange ( Fig. 14 )................................. P. jactatus sp. nov.

- Dorsal abdominal segments III–IX black with pale yellow median longitudinal stripe running from III to middle third of segment VII; head dorsally black with the space between eye and ocelli and short longitudinal stripe between ocelli pale yellow; meta-acetabulae black to dark castaneous with bluish green reflections......................................... 15

15 Pronotal disk reddish brown to black with bluish green reflections; hind femora shiny black to reddish brown or with dorsal face shiny black and ventral face shiny reddish brown ( Fig. 18 )........................................ P. virago Breddin

- Pronotal disk orange to dark castaneous orange with posterior margin dark with bluish green reflections; hind femora shiny castaneous orange ( Fig. 17 )............................................................ P. proletarius Breddin

Figures

FIGURES 3–10. Dorsal view of Petalops spp. 3, P. azureus (Burmeister) (female). 4, P. bellator Brailovsky (male). 5, P. lautus sp. nov. (female). 6, P. necopinus sp. nov. (male). 7, P. occulta Brailovsky (female). 8, P. thoracicus Montandon (male). 9, P. ambiguus Brailovsky (female). 10, P. distinguendus Breddin (female).

FIGURES 11–18. Dorsal view of Petalops spp. 11, P. distinctus Montandon (male). 12, P. fortunatus Dallas (male). 13, P. graziaea sp. nov. (female). 14, P. jactatus sp. nov. (female). 15, P. luteomaculosus Brailovsky (male). 16, P. napoensis Brailovsky (male). 17, P. proletarius Breddin (male). 18, P. virago Breddin (male).

FIGURES 1–2. Metathorax view of Petalops spp. 1, P. napoensis Brailovsky (male). 2, P. distinguendus Breddin (female).