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Tergomya - Archinacellida
It was corrected as Archinacelloidea by Bouchet et al. (2005) and Wagner (2017).
It was assigned to Tryblidioida by Knight and Yochelson (1960); to Tryblidiida by Wahlman (1992); to Mollusca by Bouchet et al. (2005); and to Archinacellida by Wagner (2017).
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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.