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Phylogeny, Historical Biogeography, And Ecology Of Anophryocephalus Spp. (Eucestoda: Tetrabothriidae) Among Pinnipeds Of The Holarctic During The Late Tertiary And Pleistocene, Eric P. Hoberg, Ann M. Adams

Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications

Phylogenetic systematic analyses of Anophryocephalus spp. resulted in a single most-parsimonious cladogram (consistency index: 80%). Cladograms for pinniped hosts (phocids and otariids) and Anophryocephalus spp. were highly incongruent, corroborating a hypothesis for colonization as a dominant determinant of parasite diversification. Phoca (Pusa) spp. in the Atlantic basin are postulated as the initial hosts; range expansion for hosts and parasites into the Pacific basin through the Arctic (ca. 3.0-2.5 million years ago) was followed by radiation of Anophryocephalus spp. among Phoca spp. and subsequent colonization of otariids (Eumetopias jubatus as typical hosts; ca. 2.0 million years ago). Host …