|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Xiphosura - Xiphosurida - Palaeophonidae
It was assigned to Scorpionida by Sepkoski (2002); and to Palaeophonidae by Thorell and Lindström (1885), Petrunkevitch (1949), Petrunkevitch (1953), Kjellesvig-Waering (1986) and Dunlop et al. (2013).
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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.