Faculty Publications

Phylogeography of the Northern Hogsucker, Hypentelium Nigricans (Teleostei: Cypriniformes): Genetic Evidence for the Existence of the Ancient Teays River

Document Type

Article

Keywords

Catostomidae, Central Highlands, H. etowanum, H. nigricans, H. roanokense, Hypentelium, North American freshwater fishes, Phylogeography, Teays River

Journal/Book/Conference Title

Journal of Biogeography

Volume

30

Issue

8

First Page

1139

Last Page

1152

Abstract

Aim: To assess the roles of dispersal and vicariance in shaping the present distribution and diversity within Hypentelium nigricans, the northern hogsucker (Teleostei: Cypriniformes). Location: Eastern United States. Methods: Parsimony analyses, Bayesian analyses, pairwise genetic divergence and mismatch plots are used to examine patterns of genetic variation across H. nigricans. Results: Species relationships within the genus Hypentelium were consistent with previous hypotheses. However, relationships between haplotypes within H. nigricans revealed two deeply divergent groups, a clade containing haplotypes from the New and Roanoke rivers (Atlantic Slope) plus Interior Highlands and upper Mississippi River and a clade containing haplotypes from the Eastern Highlands, previously glaciated regions of the Ohio and Wabash rivers, and the Amite and Homochitto rivers of south-western Mississippi. Main conclusions: The phylogenetic history of Hypentelium was shaped by old vicariant events associated with erosion of the Blue Ridge and separation of the Mobile and Mississippi river basins. Within H. nigricans two clades existed prior to the Pleistocene; a widespread clade in the pre-glacial Teays-Mississippi River system and a clade in Cumberland and Tennessee rivers. Pleistocene events fragmented the Teays-Mississippi fauna. Following the retreat of the glaciers H. nigricans dispersed northward into previously glaciated regions. These patterns are replicated in other clades of fishes and are consistent with some of the predictions of Mayden's (Systematic Zoology, 37, 329, 1988) pre-Pleistocene vicariance hypothesis.

Department

Department of Biology

Original Publication Date

8-1-2003

DOI of published version

10.1046/j.1365-2699.2003.00888.x

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