The African hexaploid Torini (Cypriniformes: Cyprinidae): review of a tumultuous history

Publication Type:Journal Article
Year of Publication:2016
Authors:E. J. W. M. N. Vreven, Musschoot, T. , Snoeks, J. , Schliewen, U. K.
Journal:Zoological Journal of the Linnean Society
Pagination:n/a - n/a
Date Published:Jan-02-2016
Keywords:Acapoeta, hexaploidy, Hybridization, intraspecific variation, Labeobarbus, mouth phenotype, mouth polymorphism, Sanagia, Varicorhinus

A review of the tumultuous history of the alpha- and genus-level taxonomy of the hexaploid African Torini, i.e. Labeobarbus s.l. (synonym: Varicorhinus), as well as of the closely related monospecific genera Acapoeta and Sanagia, is provided. The main purpose of the present paper is to provide a continental framework for multidisciplinary research on this megadiverse vertebrate group. Based on the inspection of almost all relevant type specimens, a complete and fully annotated checklist of all valid species and junior synonyms is provided for each of the four nominal genera. It comprises ∼275 nominal taxa, 125 of which are valid African Labeobarbus spp. and three of which are formally named hybrid phenotypes. Particular attention is drawn to the diversity and taxon-specific distribution of mouth phenotypes, which previously served as generic identification characters, i.e. ‘rubberlips’ with strongly developed, sometimes hypertrophied lips and a mental lobe, and ‘chiselmouths’ (former Varicorhinus spp.) with a cornified sharp cutting edge on their lower jaw. Interestingly, many species are polymorphic and include a large array of intermediate mouth phenotypes. The recurrent occurrence of similar mouth phenotype diversity within, but also far beyond, the borders of Labeobarbus s.l. is highlighted, raising numerous evolutionary questions.

Short Title:Zool J Linn Soc

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