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15 September 2006 Phylogenetic Relationships of Noturus Stanauli and N. Crypticus (Siluriformes: Ictaluridae), Two Imperiled Freshwater Fish Species from the Southeastern United States
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Abstract

Noturus stanauli and N. crypticus are two madtom catfish species of conservation concern with very restricted distributions in the Upper Tennessee River Drainage and Duck River. A recent phylogenetic analysis of Noturus using mtDNA sequences did not include these species. A new phylogenetic analysis of cytochrome b sequences including N. stanauli and N. crypticus is presented. Both maximum parsimony and Bayesian analyses indicate that N. stanauli and N. crypticus are closely related and nest within a genetically divergent clade comprising N. fasciatus, N. baileyi, N. elegans, and a paraphyletic N. hildebrandi. Limited intraspecific sampling of N. stanauli and N. crypticus revealed few genetic differences within these species. We discuss our results in the context of conservation status of these species and the use of phylogenetic trees and sequence data in the delimitation of cryptic species diversity in Noturus.

2006 by the American Society of Ichthyologists and Herpetologists
Thomas J. Near and Michael Hardman "Phylogenetic Relationships of Noturus Stanauli and N. Crypticus (Siluriformes: Ictaluridae), Two Imperiled Freshwater Fish Species from the Southeastern United States," Copeia 2006(3), 378-383, (15 September 2006). https://doi.org/10.1643/0045-8511(2006)2006[378:PRONSA]2.0.CO;2
Received: 28 August 2005; Accepted: 2 May 2006; Published: 15 September 2006
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