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Tergomya - Tryblidiida - Tryblidiidae
It was corrected as Triblidium by Koken (1897).
It was assigned to Gastropoda by Koken (1897); to Tryblidiinae by Knight and Yochelson (1960); to Tryblidiidae by Starobogatov (1970) and Runnegar and Jell (1976); to Monoplacophora by Sloan and Webers (1987); and to Tryblidiida by Sepkoski (2002).
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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.