Cylapus stellatus ( 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 : 438-440

Cylapus stellatus ( Distant, 1883)

( Figs 48, 49, 62 , 110–114 )

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

Valdasus stellatus: ATKINSON (1890) : 49 (list).

Cylapus stellatus POPPIUS (1909) : 43 (list, new combination); BERGROTH (1920):71 (list); CARVALHO & FONTES (1968): 275 (list); SCHUH (1995): 24 (catalog); GORCZYCA (2006b): 16 (catalog); SCHUH (2013) (online catalog).

Cylapus (Cylapus) stellatus: CARVALHO (1957) : 31 (catalog).

Type material examined. GUATEMALA: VERA CRUZ: LECTOTYPE (designated by CARVALHO & DOLLING 1976): ♀, “Cubilguitz, Vera Paz, Champion; B.C.A., Hem. I Cylapus stellatus ; BMNH(E) 1705767; Lectotype [round label with violet border]” ( BMNH). PARALECTOTYPE: J, “San Juan, Vera Paz, Champion; Distant Coll. 1911–383.; Paralectotype [round label with blue border]” ( BMNH) .

Diagnosis. Recognized by the following set of features: antennal segment II in both sexes thinner than segment I ( Fig. 49); pronotum with two thin yellow stripes, each bordering lateral margin and a thin, yellow, longitudinal stripe medially ( Figs 48, 49); scutellum with three yellow patches: two situated basolaterally and one situated apically ( Figs 48, 49); corium with four yellow patches: one basally, two medially and one apically ( Figs 48, 49); sclerite es1 with both margins strongly sinuate, apical one fifth broadened and serrate; es2 broadened toward apex with apical one fourth round and serrate; es3 with basal two thirds gradually becoming thicker toward apex, its apical one third strongly broadened, nearly triangular; es4 thin, nearly cylindrical, weakly tapering apically ( Fig. 110 ); left paramere with sensory lobe weakly developed ( Figs 111, 112 ).

Most similar to C. marginicollis in sharing the yellow swelling along lateral margin of pronotum ( Figs 45, 48, 49). It can, however, be distinguished by the antennal segment II thinner than segment I ( Fig. 49) and the male genitalia ( Figs 110–114 ). With C. striatus and C. tenuicornis it shares three patches on scutellum and four patches on corium ( Figs 48–53) but can be easily distinguished by the male genitalia.

Redescription. Female. Coloration ( Figs 48, 49, 62 ). Dorsum dark brown with yellow areas. Head dark brown with broad, yellow areas posterolaterally and medially; frons, maxillary and mandibular plates, clypeus, and buccula dark brown, weakly tinged with yellow; gula mostly yellow; antennal segment I blackish; segment II narrowly blackish basally, rest of basal half dirty yellowish, apical half (except for yellow extreme apex) dark brown; segments III and IV brown; labium dark brown. Thorax. Pronotum dark brown with three yellow stripes: two, occupying basal three fourths, situated along posterior margins and one, originating from posterior margin of pronotal calli and reaching posterior margin, situated medially. Mesoscutum and scutellum dark brown; scutellum with three yellow patches: two situated posterolaterally and one apically. Thoracic pleura. Proepisternum and anterior one third of proepimeron dark brown, posterior two thirds dark red; remaining pleura blackish; metathoracic scent gland evaporative area fuscous, broadly dark with yellow. Hemelytron dark brown; corium with four yellow patches: one situated on R+M vein basally, two situated medially, and one apicolaterally; clavus with two small yellow patches: basally and apically; cuneus dark brown, apical angle dark yellow, inner angle yellow; membrane fuscous. Legs. Coxae, pro- and mesofemora (hind leg lacking) blackish; mesofemur with yellow patch medially; protibia blackish with yellow annulation medially; mesotibia dark yellow at basal half with yellow annulation medially and blackish apical half; pro- and mesofemora brown. Abdomen blackish, weakly tinged basally.

Male. Similar to female in coloration, structure, texture, and vestiture. Male genitalia ( Figs 110–114 ). Aedeagus ( Fig. 110 ). Endosoma with four endosomal sclerites (es1–es4): es1 with both margins strongly sinuate, apical one fifth broadened and serrate; es2 broadened toward apex with apical one fourth round and serrate; es3 with basal two thirds gradually becoming thicker toward apex, its apical one third strongly broadened, nearly triangular; es4 thin, nearly cylindrical, weakly tapering apically. Left paramere ( Figs 111–113 ). Apical process in dorsal view with proximal two thirds with dorsal margin broadly concave medially, ventral margin straight, apex tapering; paramere body in dorsal view weakly arcuate, in lateral view strongly arcuate; sensory lobe weakly developed. Right paramere ( Fig. 114 ). Apical process moderately developed, sharply pointed; paramere body relatively thin, outer margin nearly straight, inner margin weakly sinuate, sensory lobe weakly developed.

Measurements (in mm).J / ♀. Body. Length: 5.90 / 6.50, width 2.10 / 2.60. Head. Length: 0.52 / 0.55, width: 1.20 / 1.25, interocular distance: 0.52 / 0.45. Antenna. Length of segment I: 1.40 / 1.00, II: 2.75 / 2.50, III 3.70 / missing, IV 3.15 / missing. Labium. Length of segment I: 0.67 / 0.65, II–IV (obscured by glue and immeasurable in both specimens). Pronotum. Length: 1.00 / 1.10, width of anterior margin: 1.15 / 1.30, length of lateral margin: 0.90 / 1.10, width of posterior margin: 2.00 / 2.35.

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

Distribution. Guatemala (Vera Paz) ( DISTANT 1883).

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 110–119. Male genitalia of Cylapus stellatus (Distant, 1883) (110–114) and C. striatus Reuter, 1907 (115–119): 110, 115 – endosoma; 111, 116 – left paramere (dorsal view); 112, 117 – left paramere (right lateral view); 113, 118 – apical process of left paramere; 114, 119 – 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.