Vilga (Laevivilga) antennata, Costa & Barcellos, 2017

Costa, Wanessa Da Silva & Barcellos, Aline, 2017, Contributions to the taxonomy of Vilga Stål (Hemiptera, Coreidae, Pseudophloeinae) with the description of a new species from southern Brazil, Zootaxa 4353 (1) : -

Vilga (Laevivilga) antennata sp. nov.

( Figs. 1–7 )

Etymology. Relates to the diagnostic character of the species.

Holotype female, Brazil, Rio Grande do Sul: Triunfo , 08.i.1988 , H. Galileo leg., ♀ ( MCNZ 49948 ); Paratypes, same locality of the holotype, 12.xi.2007 , C. Ohlveiler col., rede de varredura, 2♀ (MCNZ 180303, 180304).

Diagnosis. Body densely pubescent, some longer setae on head and pronotum. Antennal segment II more than half the width of segment I. Humeri projected anterolaterally. Spermathecal bulb tapered distally.

Description. Color pattern ( Figs. 1−2 ). General color castaneous. Pronotum with an irregular longitudinal blackish stripe in middle, not reaching posterior margin. Apex of scutellum yellowish. Femora darker than general color, with scattered lighter spots. Tibiae darker on proximal and distal ends. Corium with piceous apical spot near M and R veins. Connexivum segments with diffuse darker transverse stripes. Urosternites with two diffuse longitudinal darker areas, variable in extent.

Head. Dorsal surface covered by small tubercles ( Dolling 1977), with longitudinal stripe of larger tubercles over mandibular plates and tylus, variable in extent. Antennal segment II more than half the width of segment I. Mandibular plates and tylus equal in length, surpassing antennifers. Bucculae punctate, at least half as long as first rostral segment. Ventral surface of head longitudinally sulcate.

Thorax. Pronotum, scutellum and corium densely pubescent, some longer setae on pronotum; humeri anterolaterally directed; posterior margin of pronotum almost straight; width across humeri about 1.8X the head width including eyes. Pleura punctate. All thoracic sterna sulcate, not only the mesosternum, as described by Dolling (1977) for the genus. Ostiole, in ventral view, located innerly to imaginary longitudinal line along outer margin of metacoxae. Femora with some larger tubercles irregularly distributed, each one with a stout seta.

Abdomen. Urotergites II – VI with punctations irregularly distributed. Tergo-connexival suture ( Rueda 1992) on urotergites II – VI. Urosternite III with two sublateral depressed areas.

Female genitalia ( Figs. 3–7 ). Plica located on apical third of urosternite VII, this urosternite with two median processes, as described by Rueda (1992) ( Fig. 7 ). Apex of laterotergites VIII attaining apex of urosternite VII ( Fig. 6 ). Internal margin of gonapophysis VIII in narrow arch ( Fig. 5 ). Gonocoxite VIII with tiny tubercles and setae close to sutural and apical margins. Arms of gynatrium sclerite in acute angle ( Fig. 4 ). Ductus receptaculi short, curved, but non-spiralled ( Fig. 3 ). Apex of spermathecal bulb tapered distally ( Fig. 3 ).

Female measurements (mm). Total length 8.4; head length 1.3, width 1.3; interocular distance 0.9; interocellar distance 0.2; anteocular length 0.8; antennal segments: I—0.8, II—0.8, III—1.2, IV—0.8; rostral segments: I—1.0, II—0.8, III—0.6, IV—0.6; pronotum length 1.5, width 2.6; scutellum length 0.9, width 0.9.

Distribution. BRAZIL, Rio Grande do Sul: Triunfo.

Figures

FIGURES 1–2. Vilga (Laevivilga) antennata Costa & Barcellos sp. nov., dorsal and lateral view, respectively. Scale bar: 1.0 mm.

FIGURES 3–7. Female genitalia of Vilga (Laevivilga) antennata Costa & Barcellos sp. nov.: 3, dissected genitalia (dorsal view); 4, gynatrium sclerite; 5, right gonocoxite and gonapophysis VIII (dorsal); 6, genital plates (ventral); 7, urosternite VII (dr, ductus receptaculi; gp VIII, gonapophysis VIII; gx VIII, gonocoxites VIII; gx IX, gonocoxite IX; gy, gynatrium; lt VIII, laterotergite VIII; lt IX, laterotergite IX; mp, median processes; pl, plica; sb, spermathecal bulb; ur VII, urosternite VII; X, proctiger).Scale bars: 3, 5, 7, 0.5 mm; 4, 0.25 mm; 6, 1.0 mm.