HUDSON, R. G. 1976. A comparison of karyotypes and erythrocyte DNA quantities in several species of catfish (Siluriformes) with phylogenetic implications. Unpubl. PhD Diss., North Carolina State University, Raleigh. LEGRANDE, W. H. 1981. Chromosomal evolution in North American catfishes (Siluriformes:Ictaluri-164-79 to Auburn University. l ort as provided through NSF dae) with particular emphasis on the madtoms, Noturus. Copeia 1981:33-52. , AND T. M. CAVENDER. 1980. The chromosome complement of the stonecat madtom, Noturus flavus (Siluriformes:Ictaluridae), with evidence for existence of a possible chromosomal race. Copeia 1980:341-344.
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Larry B. Crowder (1984) studied this question.
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