Cephalozoa
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Cephalozoa 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, r
Yorgia
Fossil of Andiva ivantsovi.
Proarticulata Classes
Sprigginidae
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Sprigginidae is an extinct family of the class Cephalozoa, characterized by having a greater number of isomers than its sister taxon, Yorgiidae. They lived approximately 635 million years ago, in the
Cephalozoa
…region, where they lived during the Ediacaran, approximately 635 to 540 Ma (millions of years ago). Cephalozoa includes the families Yorgiidae and Sprigginidae, as well as genera not assigned to any family: † Archaeaspinus Ivantsov, 2007 (synonym of Archaeaspis) † Archaeaspinus fedonkini Ivantsov, 2001…
Spriggina floundersi MUSE
Cyanorus singularis
Praecambridium sigillum