Geographic variation in Parauchenoglanis ngamensis (Boulenger 1911), (Siluriformes: Auchenoglanididae)

Michael E. Retzer

doi:10.1635/0097-3157(2008)157[45:GVIPNB]2.0.CO;2

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Michael E. Retzer¹

¹Division of Biodiversity & Ecological Entomology, Illinois Natural History Survey, 1816 S. Oak St., Champaign, IL 61820 USA Email: retzer@uiuc.edu

Abstract

The catfish, Parauchenoglanis ngamensis (Auchenoglanididae), is distributed in the Kasai and upper Zambezi-Okavango basins in southern Africa. The Kasai Basin population can be distinguished from the upper Zambezi-Okavango basins population by a less robust humeral process of the cleithrum, a longer external mandibular barbel, and less pigmentation on the body and fins. A population at Lake Calundo, appears to represent a portion of a cline within the species or a hybrid zone between two forms in the Kasai and upper Zambezi-Okavango basins.

Citation Download Citation

Michael E. Retzer "Geographic variation in Parauchenoglanis ngamensis (), (Siluriformes: Auchenoglanididae)," Proceedings of the Academy of Natural Sciences of Philadelphia 157(1), 45-50, (1 July 2008). https://doi.org/10.1635/0097-3157(2008)157[45:GVIPNB]2.0.CO;2

Published: 1 July 2008

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