Three new species of Hemiosus Sharp (Coleoptera: Hydrophilidae) and new state records of Hemiosus fittkaui Oliva and H. moreirai d’Orchymont from Brazil Author Clarkson, Bruno Author Ferreira-Jr, Nelson text Zootaxa 2009 2139 61 68 journal article 10.5281/zenodo.188527 d6cc88c6-954e-4301-9f13-ff066b5a05ba 1175-5326 188527 Hemiosus fittkaui Oliva, 1994 Material examined. DZRJ : 1 3 ( Coleoptera 1822 ), BRASIL : Bahia, Mucuri,/ Rio Mucuri,/ 26.VIII.1988 ,/ A. L. Carvalho, G. R. da/ Silva & L. F. M. Dorvillé/ leg.; 4 Ƥ DZRJ : ( Coleoptera 2546 ), BRASIL : Bahia, Mucurí,/ Rio Mucurí,/ 26.VIII.1988 ,/ A. L. Carvalho, G. R. da/ Silva & L. F. M. Dorvillé/ leg. Remarks. The holotype of H. fittkaui was described from Rio Itu in Amazonas State, Brazil . Oliva (1994) considered this species (like others occurring in northern South America ) as a relictual species associated with a putative South America refugium, because their preference for sandy bottom habitats might restrict their dispersion ( Oliva 1994 , 2007 ). However in this case, the restricted distribution she found is most likely related to a lack of sampling; Hemiosus fittkaui is herein the first record from Bahia State, Brazil . Although, habitat notes were not given in the collecting labels, the material was collected from the potamal region of the river (A. L. Carvalho, pers. comm.).