Hydrodessus biguttatus (Guignot, 1957) Material examined. Brazil: Amazonas State, Barcelos County, “ Base da Serra do Aracá, Igarapé s/ nome, mar- gem esquerda do Ig. da Cobra ” (00º52’13”N 63º27’13”W); 147 m a.s.l.; 02.viii.2009; leg. N. Ferreira Jr., J. Nessimian, F. Salles, A. Santos, U. Neiss, J. Silva (INPA, 3). “Base da Serra do Aracá, Igarapé da Anta (00º52’31”N 63º27’31”W); 113 m a.s.l.; 30.vii.2009; leg. N. Ferreira Jr., J. Nessimian, F. Salles, A. Santos, U. Neiss, J. Silva (INPA, 1). São Gabriel da Cachoeira County, “ rio Querari ” (01º05’N 69º51’W); 07.iv.1993; leg. C. Motta, R. Ferreira, J. Vidal, B. Matteo (INPA, 1). Distribution. Brazil (Amazonas*, Pará, São Paulo), Guyana (Mazaruni-Potaro District), Suriname (Sipaliwini District) and Venezuela (Amazonas) (Miller 2016) (Fig. 17). Habitat. Specimens have been collected from blacklights in tropical forests and from the margins of a river and a flooded forest stream (Miller 2016). Specimens from Brazil were collected in forest streams at 113–147 m a.s.l.

Published as part of Benetti, Cesar J., Michat, Mariano C. & Hamada, Neusa, 2020, Hydrodessus ducke sp. n. and new records of other species of the genus (Coleoptera, Dytiscidae, Bidessini), pp. 47-60 in Zootaxa 4743 (1) on page 50, DOI: 10.11646/zootaxa.4743.1.4, http://zenodo.org/record/3687626