''Fundulopanchax sjostedti'', the blue gularis, golden pheasant gularis or red aphyosemion, is a species of toothcarp endemic to the Niger delta. It is only found in

Nigeria Nigeria, officially the Federal Republic of Nigeria, is a country in West Africa. It is situated between the Sahel to the north and the Gulf of Guinea in the Atlantic Ocean to the south. It covers an area of . With Demographics of Nigeria, ...

and

Cameroon Cameroon, officially the Republic of Cameroon, is a country in Central Africa. It shares boundaries with Nigeria to the west and north, Chad to the northeast, the Central African Republic to the east, and Equatorial Guinea, Gabon, and the R ...

Etymology

It is named after the Swedish naturalist

Bror Yngve Sjöstedt Bror Yngve Sjöstedt (August 3, 1866, Hjo – 1948) was a Swedish naturalist. Sjöstedt gained his degree and his doctorate in 1896 at the University of Uppsala. He worked as an assistant in Statens Entomologiska Anstalt from 1897 to 1902, bec ...

(1866–1948) who collected the

type specimen In biology, a type is a particular wikt:en:specimen, specimen (or in some cases a group of specimens) of an organism to which the scientific name of that organism is formally associated. In other words, a type is an example that serves to ancho ...

close to a waterfall by the Ndian River, in the Ndian department in

's Southwest Region.

Description

This species expresses

sexual dimorphism Sexual dimorphism is the condition where sexes of the same species exhibit different Morphology (biology), morphological characteristics, including characteristics not directly involved in reproduction. The condition occurs in most dioecy, di ...

. The males are more colourful and larger than the females, expressing very attractive colours. They outsize all other members of their genus, attaining lengths of . It's a powerful and predatory species, feeding on invertebrates as well as small fish. However it's not the largest species of killifish; note for example the Gulf killifish (''Fundulus grandis'') which can reach a maximum length of .

References

sjostedti Freshwater fish of Cameroon Freshwater fish of West Africa Fish described in 1895 Taxa named by Einar Lönnberg {{Nothobranchiidae-stub