Descriptions of three new species of Marcusenius Gill, 1862 (Teleostei: Mormyridae) from South Africa and Mozambique

Publication Type:Journal Article
Year of Publication:2014
Authors:P. A. Maake, Gon, O. , Swartz, E. R.
Date Published:03/2014
ISSN:1175-5326 (Print Edition), 1175-5334 (Online Edition)
Keywords:CYTOCHROME B, DNA barcoding, genetics, genetypes, identification key, MARCUSENIUS, morphology, Mozambique, South Africa, species descriptions

Morphological and genetic studies of mormyrid fishes belonging to the genus  Marcusenius  from South Africa and Mozambique revealed four species of which three are described as new.  Marcusenius   pongolensis  is widespread throughout the Incomati, Pongola and Kosi river systems, and sparsely represented in the Limpopo River system in South Africa.  Marcusenius   krameri  sp. nov. is endemic to the Limpopo River system, and is the sister taxon of  M .  caudisquamatus  sp. nov. from the Nseleni and Mhlatuze river systems in the KwaZulu-Natal Province of South Africa. The Ruvuma specimens were well differentiated from all southern and eastern African species of  Marcusenius , and are therefore recognised as  M. lucombesi  sp. nov. Phylogenetic analysis of the mitochondrial cytochrome b gene showed that the three new species and  M .  altisambesi  form a monophyletic lineage that is sister to a group containing  M .  pongolensis  and  M.   macrolepidotus. Marcusenius krameri and M. lucombesi seems to prefer slow flowing reaches of rivers, whereas M. pongolensis and M. caudisquamatus seems to mainly inhabit rapid flowing sections of rivers with a rocky substrate. A key to the southern African species of Marcusenius is provided.

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