Cylapus marginicollis ( Distant, 1883 )

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 : 431-436

Cylapus marginicollis ( Distant, 1883)

( Figs 44, 45, 60 , 91–94, 97–101 )

Valdasus marginicollis Distant, 1883: 243 (new species).

Valdasus marginicollis: ATKINSON (1890) : 49 (catalog); CARVALHO & DOLLING (1976): 801 (discussion of type).

Cylapus marginicollis DISTANT (1893) : 420 (new combination); POPPIUS (1909): 43 (list); BERGROTH (1920): 71 (list); SCHUH (1995): 23 (catalog); GORCZYCA (2006b): 16 (catalog); SCHUH (2013) (online catalog).

Cylapus (Cylapus) marginicollis: CARVALHO (1957) : 30 (catalog).

Type material (not examined). HOLOTYPE: PANAMA: CHIRIQUÍ: 1 ♀, “ Volcan de Chiriqui 2500 to 4000 feet, Bugaba (Champion)” ( BMNH).

Type material examined. PARATYPES: PANAMA: CHIRIQUÍ: 2 ♀♀ on one pin: “V[olcan] de Chiriqui, 25–4000 ft., Champion; B.C.A., Hem. I Cylapus marginicollis, Exchange Ex B.M. (N.H.); Carvalho to Drake Coll. 1993; paratype [yellow round label]” ( USNM) ; 1 J: “V[olcan] de Chiriqui, 25–4000 ft., Champion; B.C.A., Hem. I Cylapus marginicollis, Exchange Ex B.M. (N.H.); Carvalho to Drake Coll. 1993; paratype [yellow round label]” ( USNM) ; 1 ♀: “V[olcan] de Chiriqui, 25–4000 ft., Champion; Cotype U.S. N.M. [red label]” ( USNM) .

Additional examined specimens. NICARAGUA: REGIÓN AUTÓNOMA DE LA COSTA CARIBE SUR: 1 ♀, “Rama Nicaragua IX–62; Colección Dr. Carpintero, Argentina; Carvalho to Drake Coll. 1993” ( USNM) ( Fig. 45). PANAMA: PANAMÁ: 2 JJ 1 ♀, “Cabima Pan, May 27.11 August Busck” ( USNM) ( Fig. 44) .

Diagnosis. Distinguished by the following set of features: antennal segment II in males thicker than segment I ( Figs 60 , 92); pronotum with distinct, yellow swelling along lateral margin ( Figs 44, 45); corium with yellow patch medially ( Figs 44, 45); endosoma with es1 short, cylindrical and without denticles at basal two thirds, apical one third broadened and serrate; es2 long, arcuate, weakly broadened and serrate apically; es3 long, tapering toward apex, its margins weakly sinuate; es4 with basal one sixth thin, nearly cylindrical, rest of the sclerite with dextrolateral margin arcuate and sinistrolateral margin strongly arcuate ( Fig. 97 ); left paramere with sensory lobe moderately developed ( Figs 98, 99 ).

Most similar to C. amazonicus , C. antennatus , C. luridus and C. tucuruiensis in sharing the antennal segment II in males thicker than segment I ( Figs 36, 38 , 43, 55, 56, 57, 59, 60 , 92). It can, however, be easily distinguished by the pronotum with yellow swelling along lateral margin ( Figs 44, 45) and the shape of the male genitalia ( Figs 97–101 ). With C. stellatus it shares yellow stripe along posterior margin of pronotum but it can be distinguished by the lack of yellow longitudinal stripe along medial part of pronotum and structure of the male genitalia.

Redescription. Female. Coloration ( Fig. 45). Dorsum dark brown with yellow areas. Head dark brown with dirty yellow and yellow areas; two dirty yellow patches occupying most of vertex, from medial sulcus to inner margin of eye; frons with three yellow, relatively large patches: two situated basolaterally, between inner margin of eye and antennal insertion and one mediobasally between antennal insertions; gula, posterior half of maxillary plates and buccula yellow; antenna black; segment III with yellow annulation basally; labium dark castaneous.

Thorax. Pronotum dark brown to black; lateral portion with relatively broad, longitudinal yellow stripe along swelling bordering lateral margin originating from anterior angle and terminating on posterior margin; posterior margin dark red. Mesoscutum and scutellum dark brown; scutellum with three, relatively large, yellow patches: two basolaterally and one apically; medial portion sometimes with longitudinal, yellow stripe. Thoracic pleura. Proepisternum and proepimeron dark red; proepimeron with yellow, longitudinal stripe medially originating from anterior margin and terminating on posterior margin; remaining pleura dark castaneous; metathoracic scent gland evaporative areas fuscous yellow. Hemelytron dark brown; basal half of R+M vein yellow; corium with yellow patch medially connected with yellow stripe of R+M vein; apex of embolium and basal margin of cuneus yellow; membrane dark brown. Legs dark brown. Abdomen varying from dark castaneous to black. Structure, texture and vestiture ( Figs 45, 91, 93, 94). Head covered with sparse, relatively long, erect setae; antenna covered with sparse, short, semirecumbent setae; segment I cylindrical; segment II weakly thinner than segment I at basal two thirds, apical one third broadened and flattened. Thorax. Pronotum covered with relatively dense, short, erect setae. Posterior portion with yellow swelling from anterior margin to posterior margin. Mesoscutum and scutellum covered with relatively dense, erect setae; scutellum flat.

Male. Similar to female in coloration, structure, texture, and vestiture but smaller. Antennal segment II thick, thicker than segment I, cylindrical ( Figs 44, 60 , 92). Male genitalia ( Figs 97–101 ). Aedeagus ( Fig. 97 ). Endosoma with four sclerites (es1–es4): es1 short, cylindrical and without denticles at basal two thirds, apical one third broadened and serrate; es2 long, arcuate, weakly broadened and serrate apically; es3 long, tapering toward apex, its margins weakly sinuate; es4 with basal one sixth thin, nearly cylindrical, rest of the sclerite with dextrolateral margin arcuate and sinistrolateral margin strongly arcuate. Left paramere ( Figs 98–100 ). Apical process arcuate, broadened at proximal half, tapering toward apex; sensory lobe moderately developed. Right paramere ( Fig. 101 ). Apical process short, obtuse; margins of paramere body strongly sinuate; sensory lobe well developed; basal process short.

Measurements (in mm). J / ♀. Body. Length: 5.75–6.00 / 6.90–7.50, width 1.80–2.00 / 2.30–2.60. Head. Length: 0.52–0.62 / 0.58–0.60, width: 1.25–1.30 / 1.35–1.37, interocular distance 0.52–0.62 / 0.55–0.58. Antenna. Length of segment I: 0.78–0.88 / 0.80–0.82, II: 3.60–3.80 / 3.10–3.45, III: 3.85 / 3.50, IV: 4.10 / 3.10. Labium. Length of segment I: 0.65 / 0.80, II: 0.90 / 0.98, III: 0.98 / 0.90, IV: 0.32 / 0.32. Pronotum. Length: 0.90–1.00 / 1.10–1. 15, width of anterior margin: 1.10–1.20 / 1.30–1.35, length of lateral margin: 0.85–1.00 / 1.12– 1.22, width of posterior margin: 1.80–1.90 / 2.25–2.45.

Biology. Collected on fallen trees covered with black fungi ( DISTANT 1883).

Distribution. Nicaragua (Región Autónoma de la Costa Caribe Sur) (this paper), Panama (Chiriquí, Panamá) ( DISTANT 1883; this paper).

Figures

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 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.

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).