Parent taxon: Annelida according to J. O. R. Ebbestad et al. 2022
See also Sepkoski 2002
Sister taxa: Amphinomea, Anellidia, Aphanoneura, Burgessochaeta, Chaetopoda, Clitellata, Ctenoscolex, Insolicorypha, Kuanchuanpivermis, Myzostomaria, Palaeoannelida, Peronochaeta, Pleistoannelida, Polychaeta, Skolekichnus, Stephanoscolex, Terebellina, Thartharella, Tubulostium, Vermiforafacta, Zhangjiagoivermis
Subtaxa: Acanthocassis Acidocharacus Saarinidae Sabelliditidae
Distribution:
• Cambrian of Belarus (3 collections), Canada (1: Newfoundland and Labrador), China (12), Estonia (1), Norway (2), the Russian Federation (7), United States (1: Nevada)
• Ediacaran of China (1), Namibia (3), the Russian Federation (1)
Total: 32 collections including 34 occurrences