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Trilobita - Phacopida - Pterygometopidae
It was reranked as Dalmanites (Pterygometopus) by Schuchert (1900).
It was assigned to Dalmanites by Schuchert (1900); to Pterygometopinae by Warburg (1925) and Jaanusson and Ramsköld (1993); to Phacopida by Sepkoski (2002); and to Pterygometopidae by Jell and Adrain (2003).
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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.