Phylogeography of postglacial range expansion in Nigronia serricornis Say (Megaloptera: Corydalidae)

Molecular Ecology
J S Heilveil, S H Berlocher

Abstract

We have examined the effects of post-Wisconsinan glacial range expansion on the phylogeography of the saw-combed fishfly, Nigronia serricornis Say (Megaloptera: Corydalidae) because aquatic insects are under-represented in postglacial studies (and in phylogeography in general), and because the effects of ecological degradation on the population genetics of environmental indicator species like N. serricornis cannot be measured unless the underlying phylogeography is understood. Sequence data from a 630-base fragment of the mitochondrial cytochrome oxidase I (COI) gene were subjected to amova and nested clade analysis for 30 populations (n = 344) of N. serricornis. Both the amova and nested clade analysis revealed substantial population structure; 44.4% of the variance occured among populations. Three northward migrations are apparent: one from Tennessee into Illinois, Indiana, Wisconsin, Michigan and Ontario, a second that radiated eastward from Pennsylvania, and a third that moved along the coast from North Carolina into Connecticut, Massachusetts, Maine and then into New York. The latter two of these migrations were the result of contiguous range expansions, while the former expansion, out of Tennessee, appears to have been ra...Continue Reading

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Sep 3, 2010·Annual Review of Entomology·Jane K HillChris D Thomas
Nov 17, 2006·Molecular Ecology·Douglas E SoltisPamela S Soltis
Feb 5, 2019·ZooKeys·Xingyue Liu
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