Subfamily Polythyridinae Schrammen 1912 (glass sponge)

Hexactinellida - Hexactinosa - Euretidae

Parent taxon: Euretidae according to R. M. Finks et al. 2004

Sister taxa: Belonisia, Chonelasmatinae, Eotretochone, Euretinae, Heterorete, Paleoramospongia, Paleoregulara, Pararete, Pseudobecksiinae, Verrucocoeloidea

Subtaxa: Lefroyella Polythyris

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Ecology: stationary epifaunal suspension feeder

Distribution:

• Miocene of Algeria (1 collection), Spain (2)

• Cretaceous of Germany (1), Poland (2)

Total: 6 collections including 8 occurrences

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