Biotoecus is a fish genus of cichlids from northern South America where one species (B. dicentrarchus) is found in the Orinoco Basin and the other (B. opercularis) occurs in the northern part of the Amazon Basin. These small cichlids do not surpass 10 cm (3.9 in) in length.
species in this genus are: Biotoecus dicentrarchus S. O. Kullander, 1989 Biotoecus opercularis (Steindachner, 1875) "Biotoecus". Integrated Taxonomic Information...
Kullander & Nijssen, 1989 Subtribe Crenicaratina Kullander, 1998 Genus Biotoecus C. H. Eigenmann & C. H. Kennedy, 1903 Genus Crenicara Steindachner, 1875...