Urubaxia tricolor (Distant, 1909)

Paladini, Andressa, Barão, Kim Ribeiro & Carvalho, Gervásio Silva, 2016, Revision of Urubaxia Fennah (Hemiptera: Cercopidae: Ischnorhininae) with description of two new species, Zootaxa 4107 (2), pp. 285-292 : 287-288

Urubaxia tricolor (Distant, 1909)

( Figures 1–10 , 33 )

Hyboscarta tricolor Distant, 1909: 190 ; Metcalf, 1961: 507. Urubaxia tricolor Fennah, 1968: 184 .

Measurements. Total length, 9.07 ± 0.15 (8.25–9.75); length of pronotum, 2.85 ± 0.05 (2.64–3.10); length of tegmina, 7.55 ± 0.11 (6.90–8.00); width of tegmina, 2.4 ± 0.06 (2.10–2.60).

Diagnose. Head, pronotum and scutellum orange-red; tegmina with basal third orange-red, costal and apical margins until the beginning of clavus brownish, median and posterior third translucent.

Description. Head orange-red ( Figs 1–2 ), second and third rostral segments black; compound eyes black, rounded, arranged transversely; vertex smooth and rectangular, lacking median carina; ocelli black, closer to each other than to compound eyes; tylus smooth and rectangular, lacking median carina; antennae black, each pedicel sparsely setose, basal body of flagellum ovoid as long as wide, bearing one arista shorter than pedicel; postclypeus orange-red, inflated, convex in profile, with one longitudinal carina strongly marked, lateral grooves strongly marked; rostrum extending to mesocoxae. Thorax orange-red, basal area of mesosternum black, pronotum orangered, hexagonal, lacking median carina; anterior margin of pronotum straight, antero-lateral margins straight, postero-lateral margins slightly sinuous, posterior margin grooved; scutellum reddish with slight concavity centrally, lacking horizontal grooves; tegmina with basal third orange-red, costal and apical margins until the beginning of clavus brownish, median and posterior third translucent; apical reticulation slightly developed; hindwings hyaline with brownish venation, vein Cu1 abruptly thickened at base; legs orange-red, tibiae and tarsomeres black; metathoracic tibia with two lateral spines (basal spine smaller than spines in apical crown; apical spine larger than spines in apical crown); apical crown of spines on each tibia consisting of two rows; two rows of spines covered by setae on basitarsus; subungueal process present, triangular. Abdomen: pale to orange-red.

Male. Pygofer brownish, with a finger-like process between anal tube and subgenital plates ( Fig. 3 ); subgenital plates long, wide at base and narrowing toward its apex, free for almost all its length ( Fig. 4 ), with a short spinelike process on the inner margin medially ( Fig. 3 ); paramere slender, with a dorsal spine pointed upwards and a median spine pointed downwards ( Figs 5–6 ), both spines sclerotized; aedeagus robust with a straight shaft, slightly enlarged at base, covered by small scale-like spines ( Figs 7–8 ).

Female. First valvulae of ovipositor long, slender and acute apically, bearing a rounded, basal process, slightly elongated and directed downwards ( Fig. 9 ); second valvulae long, with apical third of dorsal margin serrate ( Fig. 10 ); third valvulae short and wide, with long ventral setae.

Distribution. Brazil (Paraná, Santa Catarina, Rio Grande do Sul) ( Fig. 33 ).

Remarks. An exclusive characteristic of U. tricolor is the shape of the subgenital plates in ventral view: the base of the plate is larger and narrows abruptly toward the apex than in other congeneric species.

Examined material. Syntype, ♀, BRAZIL ( BMNH); BRAZIL: Paraná: Bituruna, 1950, J.C.M. Carvalho coll. (1 ♂ DZUP #215220); Curitiba, xi.1976, A.M. Sakakibara coll. (18 ♂ DZUP, 2 ♂ MCTP); Campo Largo, Est. Faxina, km 4, 01.xi.2002, Excursão Fauna Local—DZOO (1 ♂ DZUP #215209); Santa Catarina: Campo Alegre, Quiriri, 1339 m, 01.iv.2009, A. Paladini & P. C. Grossi coll., 26.0270° S 48.9830° W (1 ♀ MCTP); Rio Grande do Sul: São Francisco de Paula, Pró-Mata, Potreiro Velho, 14–17.xii.2009, P. C. Grossi & D. R. Parizotto, - 29.480720 S - 50.174436 W (2 ♀ MCTP).

Figures

FIGURE 33. Distribution of species of Urubaxia.

FIGURES 1 – 10. Urubaxia tricolor. 1. Habitus, dorsal view; 2. Habitus, lateral view; 3. Male pygofer, lateral view; 4. Subgenital plates, ventral view; 5. Paramere, lateral view; 6. Paramere, dorsal view; 7. Aedeagus, lateral view; 8. Aedeagus, dorsal view; 9. Ovipositor, first valvulae, lateral view; 10. Ovipositor, second valvulae, lateral view.