Phylum †Proarticulata Fedonkin, 1985
   Class †Cephalozoa Ivantsov, 2004
     01 Genus †Andiva Fedonkin, 2002
     02 Genus †Archaeaspinus Ivantsov, 2007
     03 Genus †Cephalonega Fedonkin, 2019, incertae sedis [monotypic]
     04 Genus †Cyanorus Ivantsov, 2004
     05 Genus †Ivovicia Ivantsov, 2007
     06 Genus †Lossinia Ivantsov, 2007
     07 Genus †Marywadea Glaessner, 1976
     08 Genus †Ovatoscutum Glaessner & Wade, 1966
     09 Genus †Podolimirus Fedonkin, 1983
     10 Genus †Praecambridium Glaessner & Wade, 1966
     11 Genus †Spriggina Glaessner, 1958
     12 Genus †Tamga Ivantsov, 2007
     13 Genus †Yorgia Ivantsov, 1999