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It was reranked as the infraclass Cirripedia by Martin and Davis (2001); it was reranked as the subclass Cirripedia by Collareta et al. (2018).
It was assigned to Thecostraca by Martin and Davis (2001); to Arthropoda by Wilson (1983) and Sepkoski (2002); to Crustacea by Martin (1904) and Kiessling (2003); and to Maxillopoda by Collareta et al. (2018).
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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.