Article

Nothobranchius cooperi (Teleostei: Cyprinodontiformes): a new species of annual killifish from the Luapula River drainage, northern Zambia

Published in: African Journal of Aquatic Science
Volume 42, issue 3, 2017 , pages: 201–218
DOI: 10.2989/16085914.2017.1372270
Author(s): B Nagy30, rue du Mont Ussy, France, BR Watters6141 Parkwood Drive, Canada, PDW van der MerweDepartment of Biochemistry, South Africa, FPD CotterillDepartment of Earth Sciences, South Africa, DU BellstedtDepartment of Biochemistry, South Africa

Abstract

Nothobranchius cooperi, Nagy, Watters and Bellstedt, new species, is described from seasonal streams and ephemeral pools associated with the upper Mansa River system in the middle Luapula drainage and systems draining into the low-lying area marginal to the southwestern part of Lake Bangweulu, in the Luapula province of northern Zambia. It belongs to the N. brieni species group. Males of Nothobranchius cooperi are distinguished from congeners by the following unique combination of characters: body scales with broad orange posterior margin, forming a highly irregular cross-barred pattern; anal fin fairly uniform orange-red with irregular to regular, light blue-green zone close to the base; caudal peduncle length 1.2–1.3 times its depth; prepelvic length 48.8–51.9% SL; and head depth 75–77% of head length. Genetic divergence of the mitochondrial COI and ND2 genes and nuclear S7 gene support the distinction of the new species from its closest known relative, N. rosenstocki and confirms its position in the N. brieni species group.

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