Kingdom Animalia Class Anthozoa Order Alcyonacea | Phylum Cnidaria Subclass Octocorallia Genus Margaretia | |
The Burgess shale organism Margaretia dorus resembles an Octocoral, according to C.D. Walcott (1931). It was later reclassified as a green alga closely resembling modern Caulerpa by D.F. Satterthwait in her Ph.D. thesis in 1976 and confirmed by Conway Morris and Robison in 1988.
References
Margaretia dorus Wikipedia(Text) CC BY-SA