Cyrtocapsus rostratus Reuter, 1908

Henry, Thomas J., 2022, Revision of the New World Plant Bug Genus Cyrtocapsus (Heteroptera: Miridae Bryocorinae: Eccritotarsini), with New and Revised Synonymies, Lectotype Designations, and Descriptions of 12 New Species, Zootaxa 5154 (1), pp. 1-48 : 36-37

Cyrtocapsus rostratus Reuter

( Figs. 49–51 , 93, 94 )

Cyrtocapsus rostratus Reuter 1908a: 181 (original description; Chile); Carvalho 1954: 13 (key), 1957: 96 (catalog); Henry & Carvalho 1987: 292 (key); Carvalho 1980: 646 (diagnosis); Schuh 1995: 542 (catalog), 2002–2013 (online catalog).

Cyrtocapsus femoralis (of authors, in part): Ferreira & Rossi 1979: 133 (distribution), Ferreira & Henry 2011: 12 (distribution), Vélez et al. 2020: 4 (distribution).

Diagnosis. Cyrtocapsus rostratus ( Figs. 49–51 ) is distinguished by the overall dark brown to fuscous dorsum, the often narrowly brownish-orange basal area of the pronotum, the triangular pale area at the apex of the corium, and the pale yellowish-white antenna and legs.

It is most similar to C. elutipes ( Figs. 20–22 ) in the overall dark dorsal coloration, pale legs, and similar parameres, but is distinguished by the larger size, the longer antennal segment II, the frequently paler brownishorange basal margin of the pronotum, and the distinctive pale triangular mark at the apex of the corium bordering the cuneus.

Description. Male ( Fig. 49 ) (n = 5): Length to apex of membrane 2.98–3.49 mm, length to base of cuneus 2.08– 2.43 mm, widest width across hemelytra 1.41–1.47 mm. Head: Width 0.75–0.80 mm, interocular width 0.40–0.43 mm. Labium: Length 0.96–1.00 mm. Antenna:; eyes Segment I length 0.54–0.60 mm; II, 0.68–0.70 mm; III (n = 3), 0.50–0.56 mm; IV (n = 1), 1.12 mm. Pronotum: Median length 1.00– 1.10 mm, basal width 1.52–1.66 mm.

Coloration: Head fuscous to black, clypeus dark brown becoming fuscous apically, inner margins of eyes and sides paler brown; eyes brownish red. Labium yellowish white, apex of segment IV darker brown; labrum often tinged with red. Antenna yellowish white. Pronotum fuscous to black, with posterior margin often narrowly paler brown to brownish orange. Scutellum black. Hemelytron fuscous to black, apical half of corium becoming dark brown, apex of corium adjacent to base of cuneus with a pale, yellowish-brown to yellowish-white triangular area; cuneus uniformly dark brown to fuscous; membrane whitish, veins dark brown. Ventral surface, including ostiolar auricle, fuscous to black. Legs, including coxae, uniformly yellowish white to white.

Texture and vestiture: Head shiny, weakly rugose, finely punctate, frons with fine transverse striations; inner margins of eyes, median line, and transverse striations with silvery, sericeous setae. Pronotum shiny, disc uniformly and deeply punctate, collar more finely punctate; calli prominent, separated by a deep pit, mostly impunctate with only a few fine punctures; anterior third around collar and calli with dense, silvery, sericeous setae, setae on disc finer and more scattered. Hemelytron dull, impunctate, with scattered and patches of silvery, sericous setae.

Male genitalia: Left paramere ( Fig. 93 ) narrow at base, broadened through main body, and narrowing to a hook apically. Right paramere ( Fig. 94 ) somewhat L-shaped, main body evenly broad and apically truncate.

Female: ( Figs. 50, 51 ) (n = 5): Length to apex of membrane 3.07–3.36 mm, length to base of cuneus 2.21– 2.34 mm, widest width across hemelytra 1.39–1.50 mm. Head: Width 0.78–0.80 mm, interocular width 0.42 mm. Labium: Length 0.75–0.82 mm. Antenna: Segment I length 0.42–0.45 mm; II, 0.50–0.59 mm; III, 0.34–0.42 mm; IV 0.56–0.62, mm. Pronotum: Median length 0.85–0.90 mm, basal width 1.20–1.25 mm. Length and width as given in original description ( Reuter 1908a): Length 2.5 mm; width 1.5 mm.

Host. Ipomoea sp. [ Convolvulaceae ]. This species was common on Ipomoea spp. in Jujuy and Salta provinces, Argentina.

Distribution. Described and previously known from only Tambillo, Chile ( Reuter 1908a). Based on the material examined, new country records are Argentina, Brazil, and Paraguay. Records of C. femoralis (of authors) from Brazil (e.g., Ferreira & Rossi 1979, Ferreira & Henry 2011, Vélez et al. 2020) should be referred to C. rostratus .

Discussion. Although I have examined only dorsal and lateral images of the lectotype (designated below) of C. rostratus , the narrow brownish-orange basal margin of the pronotum and the pale triangular mark at the apex of the corium are distinctive for many specimens of this species, though more uniformly dark individuals are common. The characters in this diagnosis are consistent with the many specimens I have studied from northern Argentina, Brazil, and Paraguay. It is possible that once more material, including males, is discovered in Chile, C. rostratus will prove distinct from the specimens I am including under it from Argentina, Brazil, and Paraguay.

Type designation. It is not clear how many specimens Reuter (1908a) had before him when describing C. rostratus ; therefore, the single female ( Figs. 50, 51 ) in the Naturhistorisches Museum Wien ( NMW) is considered a syntype. To ensure nomenclatural stability, I designate this specimen as the lectotype for C. rostratus : [ CHILE] label 1 (handwritten), “Otto. 1895, Tambillo”; 2 (handwritten) “ Cyrtocapsus rostratus n. sp. det. O. M. Reuter”; 3 (red handwritten), “ Syntypus ”; 4 (here added), “ LECTOTYPE: ♀ Cyrtocapsus rostratus Reuter , desig. by T.J. Henry.”

Other material examined. ARGENTINA: Jujuy Prov.: 2 ♂♂, 12 ♀♀, Jujuy Prov., Prov. Rd. 1, 3 km E of Natl. Rd. 34, 23º02.431’S, 64º, 56.223’W, 450 m, 12 Feb. 2016, T.J. Henry & P.M. Dellapé, ex Ipomoea sp. ( USNM) . Salta Prov.: 18 ♂♂, 19 ♀♀ (and nymphs), Salta Prov., N. of Oran, Hwy 50, NW on rd to Abra Grande , 22º59.063’S, 64º72.425’W, 7 Feb. 2016, T.J. Henry & P.M. Dellapé, ex Ipomoea sp. (4 ♂♂, 4 ♀♀, MLP; 14 ♂♂, 15 ♀♀ USNM) ; 7 ♂♂, 3 ♀♀, Salta Prov., Hwy. 50, 8 km S of Oran, 23º13.534’S, 64º17.219W, 8 Feb. 2016, T.J. Henry & P.M. Dellapé ( USNM) ; 1 ♀, Salta Prov., Pichanal, jct. Prov. Rd. 50 & 34, 375 m, 23º18.415’S, 64º13.114’W, 9 Feb. 2016, T.J. Henry and P.M. Dellapé ( USNM) . BRAZIL: Bahia : 1 ♀, Bahia , Entre Rios , 4 June 1908 [no collector] ( USNM) . Goias: 2 ♂♂, 2 ♀♀ (four points on one pin), Goias, Aragarças , J.C.M. Carvalho [no date] ( USNM) . Minas Gerais: 1 ♀, Minas Gerais, Viçosa , 13 Oct.–1 Nov. 1985, T.J. Henry & P.S. Fiuza F. ( USNM) . PARAGUAY: 1 ♂, Dept. Canindeyu, Reserva Natural del Bosque Mbaracayú , 19–22 Nov. 2016, J.E. Eger ( USNM) .

Figures

FIGURES 49–57. Habitus images of Cyrtocapsus spp. 49–51, C. rostratus. 49, male dorsal aspect. 50, female lectotype, dorsal aspect. 51, female lectotype, lateral aspect. 52–54, C. schaffneri. 52, male, dorsal aspect. 53, female, dorsal aspect. 54, C. female, lateral aspect. 55, C. spatulatus, holotype male, dorsal aspect. 56, 57. C. suturalis. 56, male, dorsal aspect. 57, male, lateral aspect.

FIGURES 85–98. Male genitalia of Cyrtocapsus spp. 85, 86, C. mesoamericanus. 85, left paramere. 86, right paramere. 87, 88, C. metafemoratus. 87, left paramere. 88, right paramere. 89, 90, C. pallipes. 89, left paramere. 90, right paramere. 91, 92, C. paraguaiensis. 91 left paramere. 92, right paramere. 93, 94, C. rostratus. 93, left paramere. 94, right paramere. 95, 96, C. schaffneri. 95, left paramere. 96 right paramere. 97, 98, C. spatulatus. 97, left paramere. 98, right paramere.

FIGURES 18–28. Habitus images of Cyrtocapsus spp. 18, 19, C. discalis, holotype male. 18, dorsal aspect. 19, lateral aspect. 20–22, C. elutipes. 20, male, dorsal aspect. 21, female, dorsal aspect. 22, female, lateral aspect. 23, 24, C. femoralis, lectotype male. 23, dorsal aspect. 24, lateral aspect. 25, 26, C. fiuzai. 25, male, dorsal aspect. 26, female, dorsal aspect. 27, 28, C. glabratus, holotype male. 27, dorsal aspect. 28, lateral aspect.