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Hexactinellida - Hexactinosa - Euretidae

Polythyris was named by Schrammen (1912) [Sepkoski's age data: K u]. It is not extant. Its type is Polythyris cuneata.

It was assigned to Hexactinosa by Sepkoski (2002); and to Polythyridinae by Finks et al. (2004).

Synonymy list
YearName and author
1912Polythyris Schrammen
2002Polythyris Sepkoski, Jr.
2004Polythyris Finks et al.

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phylumPoriferaGrant 1836
classHexactinellidaSchmidt 1870
subclassHexasterophoraSchulze 1886
orderHexactinosaSchrammen 1903
familyEuretidaeZittel 1877
subfamilyPolythyridinaeSchrammen 1912

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.

No diagnoses are available