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Cystaster
Taxonomy
Cystaster was named by Hall (1871) [Sepkoski's age data: O Cara-m O Ashg-m Sepkoski's reference number: 318]. It is not extant.
It was assigned to Hemicystitidae by Regnéll (1966); and to Isorophida by Sepkoski (2002).
It was assigned to Hemicystitidae by Regnéll (1966); and to Isorophida 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.
G. †Cystaster Hall 1871
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Diagnosis
No diagnoses are available