''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 ( ), , ig, Naìjíríyà, yo, Nàìjíríà, pcm, Naijá , ff, Naajeeriya, kcg, Naijeriya officially the Federal Republic of Nigeria, is a country in West Africa. It is situated between the Sahel to the north and the Gulf o ...

and

Cameroon Cameroon (; french: Cameroun, ff, Kamerun), officially the Republic of Cameroon (french: République du Cameroun, links=no), is a country in west-central Africa. It is bordered by Nigeria to the west and north; Chad to the northeast; the C ...

. 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, beco ...

(1866–1948) who collected the

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

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 the sexes of the same animal and/or plant species exhibit different morphological characteristics, particularly characteristics not directly involved in reproduction. The condition occurs in most ani ...

. 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 Fish described in 1895 {{Improve categories, date=January 2022