PhalloptychusPhalloptychus is a genus of poeciliids native to eastern and southern Brazil, northern Argentina, Paraguay and Uruguay. The maximum length for a male is around 2.5cm, while for females it is around 3.5 to 4cm.SpeciesThere are currently three recognized species in this genus: Phalloptychus eigenmanni Phalloptychus iheringii ''Phalloptychus januarius''