Phylogenetic Relationships among Bullhead Catfishes of the Genus Ameiurus (Siluriformes: Ictaluridae)
Catfishes of the genus Ameiurus are a well-known component of the North American ichthyofauna. J. G. Lundberg estimated phylogenetic relationships among species of Ameiurus according to morphological variation. Two clades containing the extant species were recovered: the natalis clade (Ameiurus natalis, Ameiurus melas, and Ameiurus nebulosus) and the catus clade (Ameiurus serracanthus, Ameiurus catus, Ameiurus platycephalus, and Ameiurus brunneus). Original nucleotide sequence data were collected from mitochondrial (cytochrome b) and nuclear (recombination activation gene 2) genes and used to test the predictions of the hypothesis based on morphological data. The monophyly of both natalis and catus clades was rejected by the nucleotide dataset and an alternative phylogenetic hypothesis is provided.Abstract
Phylogeny and classification of Ameiurus species as inferred from morphological data. Adapted from Lundberg (1992)
Accumulation plots of substitutions for all codon positions and at third, first, and second codon positions of the full cyt-b dataset
Summarized results of maximum parsimony analysis for all data partitions and combined genetic partitions. Cyt-b Length = 508, CI = 0.768, RI = 0.508; RAG2 Length = 42 (6 trees), CI = 0.886, RI = 0.500; Morphology Length = 146 (2 trees), CI = 0.863, RI = 0.706; cyt-b + RAG2 Length = 546, CI = 0.775, RI = 0.500. Numbers above nodes are nonparametric bootstrap percentages
Maximum parsimony phylogram for the full cyt-b dataset. Length = 508, CI = 0.715 RI = 0.830. Numbers above nodes are nonparametric bootstrap percentages