''Geophagus sveni'' is a

Geophagini Geophagini is a Tribe (biology), tribe of cichlids from the subfamily Cichlinae, the American cichlids. It is the sister taxon to the clade which includes the Cichlasomatini and Heroini. Fishes in the Geophagini are distributed from Panama south ...

cichlid Cichlids () are a large, diverse, and widespread family of percomorph fish in the family Cichlidae, order Cichliformes. At least 1,760 species have been scientifically described, making it one of the largest vertebrate families, with on ...

native to the

Tocantins River The Tocantins River ( , Parkatêjê dialect, Parkatêjê: ''Pyti'' ɨˈti is a river in Brazil, the central fluvial artery of the country. In the Tupi language, its name means "toucan's beak" (''Tukã'' for "toucan" and ''Ti'' for "beak"). It ...

drainage in

Brazil Brazil, officially the Federative Republic of Brazil, is the largest country in South America. It is the world's List of countries and dependencies by area, fifth-largest country by area and the List of countries and dependencies by population ...

. ''Geophagus sveni'' is a medium-sized cichlid that reaches approximately in standard length (SL), and is usually found in the Tocantins River basin. Similarly, ''Geophagus sveni'' has a typical teleost encephalon, without significant intraspecific variation and hence without dimorphic traits.

Etymology

The fish is named in honor of

Sven O. Kullander Sven Oscar Kullander (born 30 November 1952 in Sollefteå) is a Sweden, Swedish biologist specialised in ichthyology. He primarily researches cichlids – notably the genus ''Apistogramma'' and the ''Cichlasoma''-complex – and other tropical ...

of the

Swedish Museum of Natural History The Swedish Museum of Natural History (), in Stockholm, is one of two major museums of natural history in Sweden, the other one being located in Gothenburg. The museum was founded in 1819 by the Royal Swedish Academy of Sciences, but goes bac ...

, for his many contributions to cichlid systematics.

References

Geophagus Cichlid fish of Brazil Fish of the Tocantins River basin Fish described in 2010 {{Cichlinae-stub