Semiaquatic bugs (Insecta, Heteroptera, Gerromorpha) from Vale do Ribeira, São Paulo state, Brazil

We present a survey of the semiaquatic bugs (Insecta, Heteroptera, Gerromorpha) from Ribeira de Iguape river basin, Vale do Ribeira, Sao Paulo state, Brazil. Six species of Gerromorpha had been previously recorded from the area based on isolated collection events, namely Oiovelia brasiliensis Moreira, Nessimian & Rudio, 2010, Rhagovelia accedens Drake, 1957, R. aiuruoca Moreira & Ribeiro, 2009, R. henryi Polhemus, 1997, R. lucida Gould, 1931, and R. trepida Bacon, 1948. Here, we record seven species for the first time from the region: Microvelia nelsoni Moreira, Barbosa & Ribeiro, 2012, M. venustatis Drake & Harris, 1933, R. occulcata Drake, 1959, R. plaumanni Polhemus, 1997, R. robusta Gould, 1931, R. zela Drake, 1959, and Stridulivelia ayacucho Polhemus & Spangler, 1995.