Osteostraci - Thyestiida

Parent taxon: Osteostraci according to R. S. Sansom 2009

See also Sansom 2008

Sister taxa: Ateleaspidiformes, Benneviaspidida, Benneviaspidiformes, Camptaspis, Cephalaspidiformes, Cornuata, Tremataspidida, Tremataspidiformes, Waengsjoeaspis, Yvonaspis, Zenaspidida

Subtaxa: Auchenaspis Ilemoraspis Kiaeraspidoidea Tremataspidoidea

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Ecology:

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