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Polyschema
Taxonomy
Polyschema is a genus. It is not extant.
It was assigned to Hexactinosa by Sepkoski (2002); and to Staurodermatidae by Reid (2004).
It was assigned to Hexactinosa by Sepkoski (2002); and to Staurodermatidae by Reid (2004).
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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.
G. †Polyschema
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Diagnosis
No diagnoses are available