Killi-Data Series 2013 [as a print, ISBN 978-2-9547546-0-4, as a PDF document, ISBN 978-2-9547546-1-1]
Killi-Data Series 2013, 21-41, 10 figs., 2 tabs.
Pronothobranchius chirioi n. sp. a new annual killifish species from the Niger River drainage, with redescriptions of P. kiyawensis, P. gambiensis and P. seymouri (Cyprinodontiformes: Nothobranchiidae).
Abstract: Pronothobranchius Radda is a geographically widespread but poorly diagnosed genus of African aplocheiloid annual killifishes. Its members inhabit a disjunct series of localities across several countries in the western Sub-Saharan region including Central African Republic, Gambia, Senegal, Ivory Coast, Ghana, Niger, Nigeria and Chad. Pronothobranchius is similar to Nothobranchius and Fundulosoma in that the hypural is fused and fan-shaped but it can be differentiated by preopercular canal structure, basihyal bone shape, and colour pattern. In this study three Pronothobranchius species previously considered synonymous with P. kiyawensis are revalidated and a new species from the Niger River drainage is described. Pronothobranchius kiyawensis inhabits the Lake Chad drainage basin and is diagnosed by males possessing small dots on the flanks and a proximal stripe on the anal fin. P. gambiensis occurs in the Gambia River drainage basin and is distinguished by males possessing only a few large spots on the flanks and a proximal stripe on the anal fin. P. seymouri is known from the Volta River drainage and is diagnosed by males possessing spots across the entire flank which form irregular, laterally-elongated stripes, and a few variably-arranged dots on the proximal portion of the anal fin. P. chirioi spec. nov. occurs in the Niger River drainage and is distinguished from all congeners by males possessing large, proximal spots on the anal fin.