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Gastropoda - Trochidae
It was reranked as Eumargarita (Periaulax) by Cossmann and Pissarro (1902); it was reranked as Solariella (Periaulax) by Le Renard and Pacaud (1995).
It was assigned to Eumargarita by Cossmann and Pissarro (1902); to Solariella by Le Renard and Pacaud (1995); to Archaeogastropoda by Sepkoski (2002); and to Solariellinae by Schnetler and Heilmann-Clausen (2011).
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.