Cephalozoa
From Wikipedia, the free encyclopedia
Phylum:†Proarticulata
Class:†Cephalozoa
Ivantsov, 2004
Ivantsov, 2004
| Cephalozoa Temporal range: Ediacaran | |
|---|---|
 | |
| Fossil of Yorgia waggoneri, a cephalozoan found on the shores of the White Sea. | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | †Proarticulata |
| Class: | †Cephalozoa Ivantsov, 2004 |
| Subtaxa | |
| |
Cephalozoa[1] are an extinct class of primitive segmented marine organisms within the Phylum Proarticulata from the Ediacaran period. They possessed bilateral symmetry and were characterized by a thin, rounded body.
Unlike the other classes of proarticulates, the segmentation of the body is not complete and shows a "head" with fine distribution channels. Some species of the Yorgiidae family also show some asymmetry.[3][4][5]
They were discovered in Russia near the White Sea in the Arkhangelsk region, where they lived during the Ediacaran, approximately 635 to 540 Ma (millions of years ago).
