Are the subgenera of Sebastes monophyletic?
Z. Li, A.K. Gray, M.S. Love, A. Goto, and A.J. Gharrett
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We examined genetic relationships among Sebastes rockfishes to evaluate the subgeneric relationships within Sebastes. We analyzed restriction site variation (12S and 16S rRNA and NADH dehydrogenase-3 and -4 genes) by using parsimony and distance analyses. Seventy-one Sebastes species representing 16 subgenera were included. Thirteen subgenera were represented by more than one species, and three subgenera were monotypic. We also evaluated three currently unassigned species. The only monophyletic subgenus was Sebastomus, although some consistent groups were formed by species from different subgenera. The northeastern Pacific species of Pteropodus clustered with one northeastern Pacific species of the subgenus Mebarus (S. atrovirens) and two northeastern Pacific species of the subgenus Auctospina (S. auriculatus and S. dalli) forming a monophyletic group distinct from northwestern Pacific Pteropodus species. The subgenera Acutomentum and Allosebastes were polyphyletic, although subsets of each were monophyletic. Sebastes polyspinis and S. reedi, which have not yet been assigned to subgenera, are closely related to two other northern species, S. crameri (subgenus Eosebastes) and the S. ciliatus/variabilis complex (subgenus Sebastosomus), which differed from other species assigned to their subgenera. These and other molecular studies show promise in determining the phylogenetic relationships among Sebastes species.
- Item number: AK-SG-07-01k
- Year: 2007
- DOI: https://doi.org/10.4027/bamnpr.2007.11