Oiovelia viannai Rodrigues & Melo

Rodrigues, Higor D. D. & Moreira, Felipe Ferraz Figueiredo, 2016, A new species and new records of Oiovelia (Heteroptera: Gerromorpha: Veliidae) from Brazil, Zootaxa 4078 (1), pp. 153-160 : 158-159

Oiovelia viannai Rodrigues & Melo in Rodrigues et al., 2014

( Figures 11 , 16–17 )

Material examined. BRAZIL, Minas Gerais State: apterous male, holotype, Luz, Ribeirão Jorge Grande, 19º40’13”S / 45º36’37”W, 27.IV.2010, H.D.D. Rodrigues leg. Paratypes: 1 macropterous male, 2 apterous females, same data as holotype, except 06.I.2010; 2 apterous males, 1 macropterous female, same data as holotype, except 13.III.2010, H.D.D. Rodrigues & G.J.C. Vianna leg. Bahia State: 1 apterous female, Andaraí, Chapada Diamantina, #28, Cachoeira do Rio Roncador, Marimbus, 12°41’57.6”S / 41°21’26.1”W, 323 m a.s.l., N. Hamada, J.M.C. Nascimento & J. O. Silva leg. All in MZUSP.

Remarks. It is common to find more than one species of Oiovelia in the same foam mass and O. cunucunumana ( Fig. 15 ) occurred together with O. viannai ( Figs 16–17 ) in the State of Minas Gerais, at a brown water stream without formation of foam ( Rodrigues et al. 2014). The same two species were found co-occurring in foam mass from a dark water stream in the State of Bahia, which represents the first record of the genus from Northeastern Brazil. Oiovelia cunucunumana is the species with the largest range within the genus, with records from Venezuela to Argentina. Oiovelia viannai is a recently described species, and until now was known only from the type locality in the State of Minas Gerais, Southeastern Brazil.

The occurrence of specimens of Oiovelia outside foam masses appears to be a secondary option, because individuals are rarely found in streams or rivers without foam. Additionally, in field trips in the State of Amazonas, northern Brazil, it was noticed that specimens seem to rest on twigs or banks of streams at night, since the number of specimens present on foam at this period is much lower than during the day (HDDR, personal observations).

Figures

FIGURES 4 – 11. Species of Oiovelia. 4 – 8. Male of Oiovelia machadoi sp. nov.; 4. abdominal segment VIII in lateral view; 5. abdominal segment VIII in ventral view; 6. lateral view of genital capsule; 7. dorsal view of proctiger; 8. paramere in lateral view; 9. male of Oiovelia brasiliensis Moreira et al., 2010, paramere in lateral view (modified from Rodrigues et al. 2014); 10. macropterous female of Oiovelia machadoi sp. nov., lateral view of abdomen; 11. macropterous female of Oiovelia viannai Rodrigues & Melo, 2014, lateral view of abdomen (paratype MZUSP). Dm = dorsal margin, Vm = ventral margin.

FIGURES 12 – 17. Species of Oiovelia, dorsal habitus. 12 – 14. Oiovelia brasiliensis Moreira et al., 2010 (Brazil, São Paulo State, Paranapiacaba); 12. apterous female. 13. macropterous male; 14. macropterous female; 15. Oiovelia cunucunumana Drake & Maldonado-Capriles, 1952 (Brazil, Bahia State); 16 – 17. Oiovelia viannai Rodrigues & Melo, 2014; 16. apterous female (Brazil, Bahia State); 17. macropterous female (paratype MZUSP).