Oiovelia chenae Rodrigues & Melo, 2014

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 : 84-87

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Oiovelia chenae Rodrigues & Melo

sp. nov.

Oiovelia chenae Rodrigues & Melo sp. nov.

( Figs 47–49 View Figs 47–49 , 59–61 View Figs 59–70 , 74 View Figs 71–77 , 78 View Figs 78–80 )

Type locality. Brazil, Pará, Alter do Chão.

Type material. All specimens macropterous. HOLOTYPE: ♂( INPA), BRAZIL: PARÁ: Alter do Chão, 10 km towards Santarém, Igarapé Jutuaranã, on foam masses, 30 m a.s.l., 02°32 ' 04.5 ″ S / 54°54 ' 33.0 ″ W, 01.x.2012, A.S. Fernandes coll. PARATYPES: 36 ♂♂30 ♀♀ ( INPA), 3 ♂♂3 ♀♀ ( DPIC), 3 ♂♂3 ♀♀ ( MZSP), same data of holotype.

Additional material examined. All specimens macropterous. BRAZIL: PARÁ: 9 ♂♂14 ♀♀ 35 nymphs ( INPA), Rio Mapuera, Igarapé da Tentativa , 08.vi.1986, V.Py-Daniel & U. Barbosa coll. GoogleMaps AMAZONAS: 18♂♂15 ♀♀ ( INPA), 2 ♂♂2♀♀ ( NMPC), São Gabriel da Cachoeira , BR-304, Km 19, in foams, 00°02 ' 58.4 ″ S / 66°57 ' 47.1 ″ W, 27.viii.2011, R.L. Ferreira-Keppler, P.V. Cruz, A.S. Fernandes & E.A. Reis coll. GoogleMaps ; 1 ♂ ( DPIC), Presidente Figueiredo, BR-174, Km 110, Igarapé Camarão , 01º01 ' 05 ″ S / 60º02 ' 02 ″ W, 10.x.2002, D.L.V. Pereira coll. GoogleMaps ; 6 ♀♀ ( INPA), Rio Preto da Eva, Rio Urubu , 02°34 ' 49.58 ″ S / 59°26 ' 22.2 ″ W, no more data GoogleMaps .

Dimensions. Macropterous male (n = 5; mm). BL 3.02–3.25; HL 0.43–0.55; HW 0.57–0.60; ANT I 0.52–0.56, ANT II 0.47–0.50, ANT III 0.33–0.35, ANT IV 0.38–0.40; EYE 0.16–0.17; PL 1.12–1.18; PW 1.05–1.12; FORE LEG: FEM 0.75–0.81, TIB 0.75–0.80, TAR I 0.06, TAR II 0.07, TAR III 0.28–0.30; MID LEG: FEM 0.95–1.02, TIB 1.00–1.12, TAR I 0.07, TAR II 0.17–0.18, TAR III 0.31–0.32; HIND LEG: FEM 1.12–1.25, TIB 1.37–1.40, TAR I 0.07–0.08, TAR II 0.25, TAR III 0.35–0.37.

Macropterous female (n = 5; mm). BL 3.55–3.60; HL 0.47–0.50; HW 0.65; ANT I 0.57, ANT II 0.50–0.53, ANT III 0.33–0.35, ANT IV 0.40–0.42; EYE 0.17–0.18; PL 1.32–1.35; PW 1.22–1.23; FORE LEG: FEM 0.85–0.87, TIB 0.86–0.87, TAR I 0.06, TAR II 0.08, TAR III 0.32–0.33; MID LEG: FEM 1.05–1.07, TIB 1.13–1.15, TAR I 0.07, TAR II 0.17–0.21, TAR III 0.36–0.37; HIND LEG: FEM 1.25–1.26, TIB 1.50–1.52, TAR I 0.07, TAR II 0.25–0.27, TAR III 0.37–0.38.

Description. Macropterous male. Color. Head orange brown, with ventral region brownish. Antennae dark brown to black. Eyes dark brown to black. Rostrum with segments I–II brownish; segment III dark brown along midline, laterally yellowish; segment IV black. Pronotum brownish, with anterior lobe and parts of margins of posterior lobe darker; midline and a small region near the posterior angle yellowish brown. Fore wings blackish, with well defined whitish pruinose areas between cells; veins lighter, and a pair of narrow white maculae starting from humeri and ending near apex of pronotum ( Fig. 47 View Figs 47–49 ). Propleura dark brown to black, with posterior region below humeral angle orange brown; meso- and metapleura dark brown to black ( Fig. 78 View Figs 78–80 ). Coxae, trochanters and a narrow basal area of femora yellowish, remaining parts dark brown to black. Prosternum dark brown, with anterior margin orange brown; meso- and metasternum dark brown. Connexiva brown to orange brown. Abdominal segments ventrally dark brown in the region of spiracles, and brown to dark brown on sternites. Genital segments brownish.

Structural characters. Head covered by fine golden pubescence and long dark setae concentrated dorsally. Antenniferous tubercles swollen and shiny. Antennae covered by golden pubescence, with long dark setae scattered on antennomeres III–IV; antennomere I robust, curved outward; II slightly more robust than III and longer; antennomere IV slightly longer than III, fusiform. Pronotum covered by golden pubescence and long dark setae concentrated on anterior lobe and posterior margin; a pair of whitish pruinose areas laterally between anterior and posterior lobes; another V-shaped pruinose area more evident on posterior lobe, not reaching the margins ( Fig. 47 View Figs 47–49 ); longitudinal midline weakly carinate, more evident between humeral angles. Pleurae with pruinose areas; propleura with irregular row of small rounded punctations on posterior portion; mesopleura anteriorly with row of same punctations; metapleura with whitish setae posteriorly. Legs covered by golden pubescence, with scattered long dark setae. Protibia slightly flattened distally, with grasping comb on distal two thirds. Pruinose areas laterally on abdominal segments III–V. Connexiva not elevated, covered by golden pubescence and long dark brown setae. Body ventrally covered by whitish pubescence. Genital segment I with anterior margin excavated ventrally; posterior region with long dark setae dorsally; dorsal posterior margin slightly concave medially ( Figs 59–60 View Figs 59–70 ). Proctiger with a slight depression on apical third, without expansions, projections or spines ( Fig. 61 View Figs 59–70 ). Paramere elongated, slightly tapering to apex, which is rounded ( Fig. 74 View Figs 71–77 ).

Macropterous female. Similar in color and morphology to macropterous male ( Fig. 49 View Figs 47–49 ), except for the more elevated connexiva and whitish pruinose areas on lateral margins of abdominal segments II–VI and a small area above spiracles on segments III and V–VII.

Intraspecific variation. Substantial variation was observed in body color and pruinose areas of the pronotum. Specimens from São Gabriel da Cachoeira have darker bodies, with pruinose area of the posterior lobe of pronotum weaker and medially divided by the longitudinal carina ( Figs 48–49 View Figs 47–49 ), whereas the specimens from Alter do Chão are lighter, with the longitudinal yellowish strip and pruinose area of the posterior lobe more evident ( Fig. 47 View Figs 47–49 ).

Differential diagnosis. This species is known only in the macropterous form. It is morphologically similar to Oiovelia hamadae sp. nov., mainly in color and pruinosity. The pro- and mesopleura are dark brown to blackish in O. chenae sp. nov., whereas in O. hamadae the dorsal half is orange brown and ventral half is dark brown. However, due to the color variation in populations of both species, it is recommended to compare the males, because females are very similar. Male paramere of O. chenae slightly tapers to the apex, and in O. hamadae it slightly tapers in the middle, widening to the apex, which is wider and more rounded. In addition, the paramere of O. pydanieli sp. nov. is very similar in shape and pilosity to O. chenae , but both species are differentiated by the color of the pronotum, which has the anterior lobe dark brown to blackish and the posterior lobe reddish brown to brownish, with a smaller yellowish area medially in the posterior angle in O. chenae , being uniform orange to orange brown in O. pydanaieli . Also, the male proctiger of O. chenae has a small depression on the dorsal surface, absent in O. pydanieli .

Etymology. Named in honor of Dr. Ping-ping Chen ( Netherlands Biodiversity Centre, Leiden), in recognition of her valuable contributions to the taxonomy of aquatic Heteroptera .

Distribution and habitat. Brazil (Amazonas and Pará).

The type series was collected on foam masses formed in a stream of transparent water on the Tapajós River Basin. It is also recorded from the Trombetas River Basin, above the Oriximiná municipality (Pará), Negro River Basin, in São Gabriel da Cachoeira, and between Manaus and Rio Preto da Eva municipalities (Amazonas). All these localities are situated in northern Brazil.


Czech Republic, Prague, National Museum (Natural History)


Instituto Nacional de Pesquisas da Amazonia


Belo Horizonte, Instituto de Ciencias Biologicas


Sao Paulo, Museu de Zoologia da Universidade de Sao Paulo


National Museum Prague