Oiovelia viannai Rodrigues & Melo

Rodrigues, Higor D. D., Melo, Alan Lane De & Ferreira-Keppler, Ruth L., 2014, Taxonomic revision of the Neotropical genus Oiovelia (Hemiptera: Heteroptera: Veliidae), Acta Entomologica Musei Nationalis Pragae (suppl.) 54 (1), pp. 65-98: 91-97

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Oiovelia viannai Rodrigues & Melo

sp. nov.

Oiovelia viannai Rodrigues & Melo   sp. nov.

( Figs 55–58 View Figs 55–58 , 68–70 View Figs 59–70 , 77 View Figs 71–77 )

Type locality. Brazil, Minas Gerais, Luz.

Type material. HOLOTYPE: ♂ (apt) ( MZSP), BRAZIL: MINAS GERAIS: Luz, Ribeirão Jorge Grande , 19º40 ' 13 ″ S / 45º36 ' 37 ″ W, 27.iv.2010, H.D.D. Rodrigues coll. GoogleMaps   PARATYPES: 2 ♂♂(apt) 2♂♂(macr) 4 ♀♀ (apt) 1 ♀ (macr) ( DPIC), 1 ♂ (macr) 2 ♀♀ (apt) ( MZSP), same data of holotype, except 06.i.2010 GoogleMaps   ; 2 ♂♂(apt) 1 ♀ (macr) ( MZSP), same data of holotype, except 13.iii.2010, H.D.D. Rodrigues & G.J.C. Vianna coll. GoogleMaps  

Dimensions. Apterous male (n = 5; mm). BL 3.55–3.67; HL 0.50–0.56; HW 0.66–0.70; ANT I 0.55–0.58, ANT II 0.48–0.52, ANT III 0.33–0.35, ANT IV 0.40–0.45; EYE 0.15–0.16; PL 1.21–1.33; PW 0.98–1.03; FORE LEG: FEM 0.82–0.90, TIB 0.83–0.91, TAR I 0.06, TAR II 0.06–0.08, TAR III 0.32; MID LEG: FEM 1.05–1.16, TIB 1.16–1.23, TAR I 0.08–0.09, TAR II 0.13–0.15, TAR III 0.36–0.40; HIND LEG: FEM 1.27–1.35, TIB 1.50–1.63, TAR I 0.08–0.09, TAR II 0.20–0.22, TAR III 0.39–0.45.

Macropterous male (n = 2; mm). BL 3.77–3.87; HL 0.47–0.52; HW 0.65; ANT I 0.55–0.62, ANT II 0.52, ANT III 0.33–0.34, ANT IV 0.41–0.42; EYE 0.16–0.17; PL 1.33–1.36; PW 1.31; FORE LEG: FEM 0.82–0.85, TIB 0.88–0.93, TAR I 0.06, TAR II 0.08, TAR III 0.32; MID LEG: FEM 1.14–1.18, TIB 1.21–1.23, TAR I 0.08, TAR II 0.15, TAR III 0.40; HIND LEG: FEM 1.16–1.30, TIB 1.55–1.60, TAR I 0.08–0.10, TAR II 0.20–0.22, TAR III 0.41–0.42.

Apterous female (n = 4; mm). BL 3.63–3.85; HL 0.53–0.60; HW 0.62–0.68; ANT I 0.58–0.62, ANT II 0.50–0.56, ANT III 0.34–0.38, ANT IV 0.40–0.45; EYE 0.15–0.17; PL 1.20–1.33; PW 0.95–1.00; FORE LEG: FEM 0.86–0.95, TIB 0.80–0.93, TAR I 0.06, TAR II 0.07, TAR III 0.33–0.36; MID LEG: FEM 1.08–1.12, TIB 1.17–1.25, TAR I 0.07–0.08, TAR II 0.12, TAR III 0.36–0.40; HIND LEG: FEM 1.18–1.33, TIB 1.50–1.63, TAR I 0.08, TAR II 0.17–0.22, TAR III 0.39–0.41.

Macropterous female (n = 3; mm). BL 4.10–4.15; HL 0.50–0.57; HW 0.68–0.70; ANT I 0.57–0.62, ANT II 0.46–0.53, ANT III 0.32–0.37, ANT IV 0.40–0.45; EYE 0.17; PL 1.43– 1.50; PW 1.35–1.40; FORE LEG: FEM 0.83–0.90, TIB 0.80–0.86, TAR I 0.06–0.07, TAR II 0.07–0.08, TAR III 0.32–0.35; MID LEG: FEM 1.10, TIB 1.16–1.18, TAR I 0.06–0.09, TAR II 0.10–0.13, TAR III 0.36–0.59; HIND LEG: FEM 1.12–1.28, TIB 1.50–1.56, TAR I 0.08–0.10, TAR II 0.20–0.22, TAR III 0.41–0.43.

Description. Apterous male. Color. Head dark brown, ventrally almost black. Antennae dark brown. Eyes dark red to dark brown. Rostrum brown, except for black apex of segments III and IV. Pronotum, pleurae, abdominal and genital segments dark brown; midline of pronotum paler. Coxae and trochanters yellowish brown; remaining of segments of legs dark brown ( Fig. 55 View Figs 55–58 ).

Structural characters. Head covered by fine golden pubescence and long dark setae concentrated dorsally in front of eyes. Antenniferous tubercles swollen and shiny. Antennae covered by golden pubescence, with long dark setae scattered on antennomeres II–IV; antennomere I curved outward, widening from base to apex; antennomere II slightly longer and more robust than III; antennomere IV slightly longer than III, fusiform. Pronotum covered by golden pubescence and long dark setae concentrated laterally on anterior lobe, with a slight midline carina; posterior lobe with a faint U-shaped whitish pruinose area. Propleura with two rows of small rounded punctations on posterior portion; mesopleura with a row of same punctations. Legs covered by golden pubescence, with scattered long dark setae. Profemur more robust; protibia with grasping comb on posterior half. Abdomen covered by golden pubescence. Connexiva slightly elevated. Six abdominal tergites visible, converging to the apex in tergite VI ( Fig. 55 View Figs 55–58 ); tergite III with preapical transverse fissure; tergite VII longer, with posterior margin slightly concave. Genital segment I with anterior ventral margin excavated and long dark setae dorsally on posterior region; posterior dorsal margin slightly concave medially ( Figs 68–69 View Figs 59–70 ). Proctiger without elevation or spines ( Fig. 70 View Figs 59–70 ). Paramere narrow, with ventral surface slightly widened in posterior half ( Fig. 77 View Figs 71–77 ).

Macropterous male. Similar to apterous male in color and morphology, except for wider pronotum and more developed humeri which are slightly elevated. Fore wings dark brown, with lighter veins; a pair of yellowish maculae at base, starting from humeri and ending near the apex of pronotum; entirely covered by whitish pruinosity, more evident between cells ( Fig. 57 View Figs 55–58 ).

Apterous female. Similar to apterous male in color and morphology ( Fig. 56 View Figs 55–58 ), but profemora not dilated; seven abdominal tergites visible; tergite I swollen; tergite II plan and directed downward; the rest of the segments arranged horizontally; connexiva reflected on abdomen, especially in segments III–VI; last abdominal tergite short, with posterior margin slightly concave; long dark setae laterally on abdominal segments II–IV and tergites VI–VII.

Macropterous female. Similar to apterous female in color and morphology ( Figs 57–58 View Figs 55–58 ), except for pronotum and fore wings similar to macropterous male, without long dark setae on lateral margin of abdominal segments II–IV.

Intraspecific variation. Substantial variation was observed only in the intensity of color in the apterous and macropterous forms. The eyes of some specimens have dark red, almost black color. The base of the femur can be yellowish brown; posterior margin of the posterior lobe of pronotum and genital segments can be brown.

Differential diagnosis. This species is known in the apterous and macropterous forms and is morphologically close to O. brasiliensis   in the similar fore wing and pruinosity, males with profemur slightly dilated and apterous form with the shape of abdominal tergites similar in both sexes. However, O. viannai   sp. nov. differs from O. brasiliensis   in the body color dark brown to blackish, with long dark setae only on the lateral margins of the anterior lobe of pronotum and a few of them scattered on the legs, absence of spines on dorsal surface of male proctiger, and in the absence of constriction on abdominal segments III–IV of the female, whereas in O. brasiliensis   the color is brownish to reddish brown, pronotum, abdomen and legs are more densely covered by dark setae along the margins, and there is a pair of small spines on male proctiger and slight constriction on abdominal segments III–IV of female.

Etymology. The species is named in honor of M.Sc. Gustavo J. C. Vianna for his help in collecting representatives of this species. His friendship helped to motivate H.D.D.R. to persist in his studies concerning this group of insects.

Distribution and habitat. Brazil (Minas Gerais).

Unlike other species of the genus which were collected on foam formed mainly in the banks of lotic environments of black water, the type series of the new species was collected on all occasions in a locality without foam masses, in a brown water stream (due to the mud substrate), with leaves and twigs on the surface and moderate current ( Figs 20–21 View Figs 16–21 ). The specimens were collected only during the rainy season (January–April), when the water level of the stream reached the marginal vegetation.


Sao Paulo, Museu de Zoologia da Universidade de Sao Paulo


Belo Horizonte, Instituto de Ciencias Biologicas