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. 1992 Sep 15;89(18):8750–8753. doi: 10.1073/pnas.89.18.8750

Class-level relationships in the phylum Cnidaria: evidence from mitochondrial genome structure.

D Bridge 1, C W Cunningham 1, B Schierwater 1, R DeSalle 1, L W Buss 1
PMCID: PMC49998  PMID: 1356268

Abstract

The phylogenetic relationships of the Recent cnidarian classes remain one of the classic problems in invertebrate zoology. We survey the structure of the mitochondrial genome in representatives of the four extant cnidarian classes and in the phylum Ctenophora. We find that all anthozoan species tested possess mtDNA in the form of circular molecules, whereas all scyphozoan, cubozoan, and hydrozoan species tested display mtDNA in the form of linear molecules. Because ctenophore and all other known metazoan mtDNA is circular, the shared occurrence of linear mtDNA in three of the four cnidarian classes suggests a basal position for the Anthozoa within the phylum.

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Selected References

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