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Trilobita - Agnostida - Ptychagnostidae
The trilobite genus Pseudophalacroma Pokrovskaya, 1958 is a homonym for dinoflagellid Pseudophalacroma Jorgensen, 1923. Ozdikmen 2009 replaces the trilobite with the new name Yakutiana.
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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.