Title |
Cnidarian phylogenetic relationships as revealed by mitogenomics
|
---|---|
Published in |
BMC Ecology and Evolution, January 2013
|
DOI | 10.1186/1471-2148-13-5 |
Pubmed ID | |
Authors |
Ehsan Kayal, Béatrice Roure, Hervé Philippe, Allen G Collins, Dennis V Lavrov |
Abstract |
Cnidaria (corals, sea anemones, hydroids, jellyfish) is a phylum of relatively simple aquatic animals characterized by the presence of the cnidocyst: a cell containing a giant capsular organelle with an eversible tubule (cnida). Species within Cnidaria have life cycles that involve one or both of the two distinct body forms, a typically benthic polyp, which may or may not be colonial, and a typically pelagic mostly solitary medusa. The currently accepted taxonomic scheme subdivides Cnidaria into two main assemblages: Anthozoa (Hexacorallia + Octocorallia) - cnidarians with a reproductive polyp and the absence of a medusa stage - and Medusozoa (Cubozoa, Hydrozoa, Scyphozoa, Staurozoa) - cnidarians that usually possess a reproductive medusa stage. Hypothesized relationships among these taxa greatly impact interpretations of cnidarian character evolution. |
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