Journal article
Phylogeny of living parasitic lampreys (Petromyzontiformes) based on morphological data
Copeia, Vol.2003(4), pp.687-703
2003
Abstract
Relationships among the 18 extant species of parasitic lamprey (Petromyzontiformes) were determined using a cladistic analysis of 32 mainly morphological characters. Because previous analyses support all known fossils as phylogenetically older or the same age as living lampreys, a composite agnathan fossil was used as an outgroup. A consensus of three equally parsimonious trees revealed a trichotomy between a monophyletic northern hemisphere clade and the southern hemisphere genera Geotria and Mordacia. The monophyletic status of the northern hemisphere lampreys and their classification in a single family Petromyzontidae was corroborated. It is suggested that the two southern hemisphere lamprey genera be retained as distinct families. Among northern hemisphere species, Ichthyomyzon and Petromyzon form a monophyletic group sister to the remaining genera. Caspiomyzon is sister to Tetrapleurodon + Entosphenus + Lethenteron + Eudontomyzon + Lampetra, with Tetrapleurodon in turn being sister to a group comprising Entosphenus and a clade containing Lethenteron and its sister group Eudontomyzon + Lampetra. Differences in many characters are related to differences in modes of feeding and behavior. In a phylogenetic context, dentitional characters are resolved as related either to blood feeding (Petromyzon, Ichthyomyzon, and Mordacia) and hypothesized to be plesiomorphic, or to flesh feeding (Eudontomyzon, Lampetra, and Geotria).
Details
- Title
- Phylogeny of living parasitic lampreys (Petromyzontiformes) based on morphological data
- Authors/Creators
- H.S. Gill (Author/Creator)C.B. Renaud (Author/Creator)F. Chapleau (Author/Creator)R.L. Mayden (Author/Creator)I.C. Potter (Author/Creator)M.E. Douglas (Author/Creator)
- Publication Details
- Copeia, Vol.2003(4), pp.687-703
- Publisher
- American Society of Ichthyologists and Herpetologists
- Identifiers
- 991005544831807891
- Copyright
- © 2003 American Society of Ichthyologists and Herpetologists (ASIH)
- Murdoch Affiliation
- School of Biological Sciences and Biotechnology
- Language
- English
- Resource Type
- Journal article
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- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.2 Marine Biology
- 3.2.62 Freshwater Fish Ecology
- Web Of Science research areas
- Zoology
- ESI research areas
- Plant & Animal Science