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Bivalvia - Arcida - Arcidae
It was reranked as Arca (Trisidos) by Grant and Gale (1931).
It was assigned to Arca by Grant and Gale (1931); to Arcidae by Mukerjee (1939) and Lamprell and Healy (1998); to Arcinae by Vokes (1980) and Tiwari (2001); and to Arcoida 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.