Biotoecus
Biotoecus is a fish genus of cichlids from northern South America where one species ' is found in the Orinoco Basin and the other ' occurs in the northern part of the Amazon Basin. These small cichlids do not surpass in length.
Species
The two recognized species in this genus are:Biotoecus dicentrarchus S. O. Kullander, 1989- ''Biotoecus opercularis''