Simpsonichthys

Wilson J. E. M. Costa, 2004, Simpsonichthys suzarti sp. n. (Teleostei: Cyprinodontiformes: Rivulidae): a new annual fish from the Rio Pardo floodplains, northeastern Brazil., Zootaxa 468, pp. 1-7 : 2

[[ Genus Simpsonichthys ]]

Simpsonichthys Carvalho is a speciose clade of South American killifishes, with a total of 40 species inhabiting seasonal pools of central, northeastern and southeastern Brazil and northern Paraguay (Costa, 1998, 2003). A subclade, here called S. constanciae species group , is diagnosed by the lateral position of eye on the head and by a derived arrangement of supraorbital neuromasts (Costa, 2003), and is endemic to the coastal river basins of northeastern and southeastern Brazil. It comprises S. constanciae (Myers) , S. bokermanni (de Carvalho and da Cruz) , S. perpendicularis Costa, Nielsen and De Luca , and S. rosaceus Costa, Nielsen and De Luca . A fifth species of this assemblage is herein described.