Pterolebias


Pterolebias is a genus of killifish from the family Rivulidae which are native to temporary swamps and ponds in South America. It includes two groups, which sometimes are regarded as separate genera: Pterolebias from the southern Amazon and Paraguay river basins, and Gnatholebias from the Orinoco river basin.
Depending on the exact species, these annual killifish reach up to in total length.

Species

There are four recognized species in Pterolebias according to FishBase, but two of these are sometimes placed in a separate genus, Gnatholebias. The two groups are relatively distantly related and if kept in a single genus Pterolebias is paraphyletic.Pterolebias