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Gastropoda - Neogastropoda - Muricidae
It was reranked as Trophon (Aspella) by Dall (1892).
It was assigned to Trophon by Dall (1892); to Muricinae by Vokes (1975) and Wilson (1994); to Neogastropoda by Sepkoski (2002); and to Muricidae by Todd (2001) and Landau et al. (2007).
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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.