|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
It was assigned to Wiwaxiidae by Walcott (1911) and Conway Morris and Robinson (1988); to Sachitida by Sepkoski (2002); to Halwaxida by Conway Morris and Caron (2007); to Metazoa by Bambach et al. (2007); and to Annelida by Caron and Jackson (2008).
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.