|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Xiphosura - Sessilia - Scalpellidae
It was assigned to Lepidocoleomorpha by Sepkoski (2002); to Plumulitidae by Vinther et al. (2008); and to Machaeridia by Parry et al. (2019).
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.