Dickinsonia
costata
Phylum
Annelida (?), Class Polychaeta (?)
Also seen:
Kingdom Incertae sedis, Phylum Vendozoa (?), Class Proarticulata, Order
Dipleurozoa, Family Dickinsoniidae
Geological
Time: Precambrian, Vendian (600 Million Years Old)
Size: 18
mm across
Fossil
Site: White Sea Summer Coast, Archangelsk , Russia
|  Dickinsonians
are known from Vendian strata of the Ediacara Hills of in south
Australia and White Sea  Region
of north Russia. Most often Dickinsonia is considered to be an annelid
worm because of its apparent similarity to Spinther, an genus of
extant worms of Class Polychaeta. Other workers, however, consider
Dickinsonia to be a cnidarian polyp.
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