Echiura
From Wikipedia, the free encyclopedia
| Echiura Temporal range: Upper Carboniferous – Recent |
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_PC301461.JPG) |
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| Bonellia viridis, female | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Annelida |
| Class: | Echiura Newby, 1940 |
| Orders | |
The Echiura, or spoon worms, are a small group of marine animals. They are often considered to be a group of annelids, although they lack the segmented structure found in other members of that group, and so may also be treated as a separate phylum.
However, phylogenetic analyses of DNA sequences place echiurans and sipuncula within the Annelida.[1]
References [change]
- ↑ Struck, TH et al. (2007-05-27). "Annelid phylogeny and the status of Sipuncula and Echiura". BMC Evolutionary Biology (BioMed Central) 7: 57. doi:10.1186/1471-2148-7-57. PMC 1855331. PMID 17411434. http://www.biomedcentral.com/1471-2148/7/57/abstract
