The taxonomic status and phylogenetic relationships of Pseudocrenilabrus Fowler (Teleostei, Cichlidae)

Publication Type:Journal Article
Year of Publication:1989
Authors:P. H. Greenwood
Accession Number:2139245
Keywords:Article Geographic Terms: Africa, Article Subject Terms: Anatomy, Article Taxonomic Terms:, counts, Evolution, Freshwater fish, meristic, Osteology, Phylogenetics, Pseudocrenilabrus, Q1 01343 Taxonomy and morphology, Q1 01345 Genetics and evolution, Synonymy, Taxonomy
Abstract:

Various and disparate opinions have been expressed with regard to the phylogenetic affinities of Pseudocrenilabrus , a seemingly generalized and primitive haplochromine genus. These views are reconsidered and rejected. Instead, it is suggested that Pseudocrenilabrus is a derived and paedomorphic taxon evolved from a generalized haplochromine ancestor such as would be represented amongst extant African cichlids by a species of the genus Astatotilapia ; for the moment it is not possible to identify a sister group more precisely. The suggestion that Pseudocrenilabrus is a paedomorphic taxon is based on certain osteological and dental features, particularly the reductional trend manifest in the infraorbital bones of its three constituent species. A new diagnosis and synonomy are provided for the genus, together with notes on its anatomy, osteology and meristic features.

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