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Trilobita - Phacopida - Homalonotidae
It was assigned to Homalonotidae by Harrington and Leanza (1957); to Reedocalymeninae by Dean (1983); to Phacopida by Sepkoski (2002) and Sepkoski (2002); to Calymenidae by Jell and Adrain (2003); and to Eohomalonotinae by Congreve and Lieberman (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.