 In Weksler 's analysis , species placed in Oryzomys did not form a coherent ( monophyletic ) group , but instead were found at various positions across the oryzomyine tree , and he suggested that most of these species , including O. polius , should be placed in new genera . Later in 2006 , Weksler and others described ten new genera for species formerly placed in Oryzomys , including Eremoryzomys for polius ; thus , the species is now known as Eremoryzomys polius . In reference to its " isolated distribution " , they incorporated the Greek word <unk> " lonely place " into the generic name . The 2008 IUCN Red List , citing Pacheco , commented that Eremoryzomys may in fact include more than one species . In 2011 , a new oryzomyine , Drymoreomys albimaculatus , was described from southeastern Brazil , and phylogenetic analysis of morphological and molecular data suggested that this animal is the closest known relative of Eremoryzomys . 
