Cylapus Say, 1832

Wolski, Andrzej, 2017, Taxonomic review of the plant bug genera Amapacylapus and Cylapus with descriptions of two new species and a key to the genera of Cylapini (Hemiptera: Heteroptera: Miridae), Acta Entomologica Musei Nationalis Pragae (Acta. Ent. Mus. Natl. Pragae) 57 (2), pp. 399-455 : 419

Key to the genus Cylapus Say, 1832

Cylapus clavicornis and C. festinabundus are not treated in this key as their placement in Cylapus is doubtful (see discussion under Cylapus for details). Cylapus famularis and C. funebris are also excluded from the key as specimens belonging to these species were unavailable for this study and the information coming from their original descriptions is insufficient in preparing of this key.

1. Pronotum without any stripe medially. ......................................................................... 2

– Pronotum with stripe medially. ..................................................................................... 9

2. Antennal segment II in males strongly thickened, as wide as or wider than segment I ( Figs 36, 38 , 43, 55, 56, 57, 59, 60 , 79 , 92); lateral portion of pronotum red ( Figs 57, 59, 60, 65 ), if not red then corium uniformly black ( Fig. 36 ). ............................................ 3

– Antennal segment II in both sexes thinner than segment I ( Figs 40–42, 46–48, 50–53 ). ........................................................................................................................................ 7

3. Pronotum entirely black, without red patch occupying its lateral portion ( Fig. 56 ). ....... ..................................................................................... C. amazonicus ( Carvalho, 1989)

– Pronotum with large, red patch laterally ( Figs 57, 59, 60, 65 ). .................................... 4

4. Pronotum with yellow stripes along its lateral margin ( Figs 45, 60 ). .............................. ..................................................................................... C. marginicollis ( Distant, 1883)

– Pronotum without yellow stripe along lateral margin ( Figs 37–39 , 43, 44, 54, 55). .... 5

5. Clavus entirely black, except of small yellow patch apically ( Figs 37–39 ). .................... ......................................................................... C. antennatus Carvalho & Fontes, 1968

– Clavus with yellow stripe along its outer margin ( Figs 43, 44, 54, 55). ....................... 6

6. Corium with transverse, yellow stripe medially ( Figs 54, 55). ........................................ ....................................................................................... C. tucuruiensis Carvalho, 1989

– Corium without transverse, yellow stripe medially ( Figs 43, 44). .... C. luridus sp. nov.

7. Endosoma with two sclerites ( CARVALHO 1986: Fig. 16 ). ................................................. ......................................................................................... C. brasiliensis Carvalho, 1986

– Endosoma with four endosomal sclerites ( Figs 80 , 102 ). ............................................. 8

8. Head with vertex and basal portion of frons varying from yellow to brown, rest of head, except of yellow gula and posterior portion of maxillary plates and buccula black ( Figs 40–42 , 58 ); endosomal sclerites as depicted on Fig. 80 . ........... C. citus Bergroth, 1922

– Head brown to dark red, medial portion of frons and clypeus usually fuscous ( Figs 46, 47, 61 ); endosomal sclerites as depicted on Fig. 102 . .......... C. ruficeps Bergroth, 1922

9. Corium (except extreme apex) without any yellow patches ( CARVALHO 1991: Fig. 3). ... ...................................................................................... C. rondoniensis Carvalho, 1991

– Corium with at least two yellow patches medially ( Figs 48–53). ............................... 10

10. Hemelytron with R+M vein tinged with yellow along entire length ( Figs 50, 51). ......... ................................................................................................... C. striatus Reuter, 1907

– Hemelytron with R+M vein not yellow ( Figs 53, 53). ......... C. tenuicornis (Say, 1882)

Figures

Figs 36–40. Dorsal habitus photographs of Cylapus species: 36 – C. amazonicus Carvalho, 1989 (J); 37–39 – C. antennatus Carvalho & Fontes, 1968 (37 – J holotype, 38 – J, 39 – ♀); 40 – C. citus Bergroth, 1922 (J).

Figs 56–65. Lateral view of Cylapus species: 56 – C. amazonicus Carvalho, 1989 (J); 57 – C. antennatus Carvalho & Fontes, 1968 (J); 58 – C. citus Bergroth, 1922 (♀); 59 – C. luridus sp. nov. (J); 60 – C. marginicollis (Distant, 1883) (J); 61 – C. ruficeps Bergroth, 1922 (♀); 62 – C. stellatus (Distant, 1883) (♀); 63 – C. striatus Reuter, 1907 (♀); 64 – C. tenuicornis (Say, 1832) (J); 65 – C. tucuruiensis Carvalho, 1989 (J).

Figs 76–79. Scanning electron micrographs of Cylapus antennatus Carvalho & Fontes, 1968 (76–77) and C. citus Bergroth, 1922 (78–79): 76–77 – antennal segment II; 78 – metafemur; 79 – pretarsal structure.

Figs 12–22. Male genitalia of Amapacylapus amapariensis Carvalho & Fontes, 1968 (12–16) and A. unicolor sp. nov. (17–22): 12, 18 – endosoma; 13, 19 – left paramere (dorsal view); 14, 20 – left paramere (right lateral view); 15, 21 – apical process of left paramere; 16, 22 – right paramere (left lateral view); 17 – genital capsule. Abbreviations: bpr = basal process; es = endosomal sclerite; pb = paramere body; pr = proctiger; ps = paramere socket; sl = sensory lobe. Scale bars: 0.1 mm.

Figs 80–89. Male genitalia of Cylapus citus Bergroth, 1922 (80–84) and C. luridus sp. nov. (85–89): 80, 85 – endosoma; 81, 86 – left paramere (dorsal view); 82, 87 – left paramere (right lateral view); 83, 88 – apical process of left paramere; 84, 89 – right paramere (left lateral view). Abbreviations: bpr = basal process; dss = sclerotized portion of ductus seminis inside endosoma; es1–4 = endosomal sclerites 1–4; pb = paramere body; sg = secondary gonopore; sl = sensory lobe. Scale bars: 0.1 mm.

Figs 97–106. Male genitalia of Cylapus marginicollis (Distant, 1883) (97–101) and C. ruficeps Bergroth, 1922 (102–106): 97, 102 – endosoma; 98, 103 – left paramere (dorsal view); 99, 104 – left paramere (right lateral view); 100, 105 – apical process of left paramere; 101, 106 – right paramere (left lateral view). Abbreviations: bpr = basal process; dss = sclerotized portion of ductus seminis inside endosoma; es1–4 = endosomal sclerites 1–4; pb = paramere body; sg = secondary gonopore; sl = sensory lobe. Scale bars: 0.1 mm.