|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Xiphosura - Xiphosurida
It was reranked as Nanahughmilleria by Sepkoski (2002) and Tetlie and Poschmann (2008).
It was assigned to Hughmilleria by Kjellesvig-Waering (1961); to Eurypterida by Sepkoski (2002); and to Adelophthalmidae by Tetlie and Poschmann (2008).
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.