| Cephalodiscida | |
|---|---|
| |
| Cephalodiscus dodecalophus | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Hemichordata |
| Class: | Pterobranchia |
| Order: | Cephalodiscida Fowler, 1892 |
| Families | |
| Synonyms | |
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Cephalodiscida is one of two orders in the class Pterobranchia, which are small, worm-shaped animals. Members belong to the hemichordates. Species in this order are sessile, living in clear water and secrete tubes on the ocean floor.
Taxonomy
The order is a small one, with only two known families, each containing a single extant genus. The validity of the family Atubaridae, who has only a sole member, is regarded as questionable.
- Order Cephalodiscida Fowler 1892
- Family Cephalodiscidae Harmer 1905
- Genus †Aellograptus Obut 1964
- Genus †Eocephalodiscus Kozlowski 1938 ex Kozlowski 1949
- Genus †Melanostrophus Öpik 1930 ex Öpik 1933
- Genus †Pterobranchites Kozlowski 1967
- Genus Atubaria Sato 1936
- Genus Cephalodiscus M'Intosh 1882
- Family †Rotaciurcidae Briggs and Koch 2023
- Genus †Rotaciurca Briggs and Koch 2023
- Family Cephalodiscidae Harmer 1905
References
- animaldiversity.ummz.umich.edu Archived June 29, 2011, at the Wayback Machine
- Eol.org
- Shipley, A.E. (1902). Zoology: An Elementary Textbook. Cambridge: Cambridge University Press.
- Halanych, K. M. (1996-02-01). "Convergence in the Feeding Apparatuses of Lophophorates and Pterobranch Hemichordates Revealed by 18S rDNA: An Interpretation". The Biological Bulletin. 190 (1): 1–5. doi:10.2307/1542669. ISSN 0006-3185.
- Maletz, Jörg (2014). "The classification of the Pterobranchia (Cephalodiscida and Graptolithina)". Bulletin of Geosciences. 89 (3): 477–540. doi:10.3140/bull.geosci.1465. ISSN 1214-1119.
Harmer. S. F. 1905. The Pterobranchia ol the Siboga-Expedition. Siboga Exped. Monogr. 26. 1-131
| Taxon identifiers | |
|---|---|
| Cephalodiscida | |
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