Nothobranchius rubroreticulatus

Nagy, Béla, 2021, Nothobranchius elucens, a new species of seasonal killifish from the upper Nile drainage in Uganda (Cyprinodontiformes: Nothobranchiidae), Zootaxa 4915 (1), pp. 133-147 : 145

Key to the species of the Nothobranchius rubroreticulatus species group

Species of the genus Nothobranchius exhibit pronounced sexual dichromatism and dimorphism. Colour pattern elements and morphometric characters are based on mature males.

1 Slender light blue subdistal band and slender dark distal band in all unpaired fins, pattern of dorsal fin mirroring anal fin (Wadi Al Ghallah drainage and Lake Chad basin in the Nilo-Sudan region)............................................ 2

- Slender light blue subdistal band and slender dark distal band in anal and caudal fins, whereas dorsal fin with only narrow light blue subdistal band and narrow dark distal band or without subdistal band (upper Nile drainage in Uganda)............. 3

2 Proximal and median part of unpaired fins almost completely covered by brown-red blotches pattern (Wadi Al Ghallah drainage in Sudan and Lake Chad basin in Chad and Cameroon)............................. Nothobranchius rubroreticulatus

- Proximal and median part of unpaired fins yellow with brown-red dotted pattern (Wad el Mileisa system, southeast of the Nuba mountains, southern Sudan)....................................................... Nothobranchius bellemansi

3 Scales on trunk and head golden-grey with brown scale margins; dorsal fin with narrow light blue subdistal band; caudal fin brown proximally and medially (Achwa drainage in the upper Nile drainage in northern Uganda).. Nothobranchius elucens

- Scales on trunk and head light blue with red-brown posterior margin; dorsal fin without subdistal band; caudal fin light blue with brown spots proximally, forming a slender brown band medially (Lake Kyoga basin in the upper Nile drainage in eastern Uganda)............................................................................ Nothobranchius taiti