Cephalaspidomorphi - Cephalaspidiformes

Parent taxon: Osteostraci according to D. L. Dineley and S. J. Metcalfe 1999

Sister taxa: Aachenaspis, Darmuthia, Fieldingaspis, Ilemoraspis, Oeselaspis, Procephalaspis, Saaremaaspis, Sclerodus, Tannuaspis, Thyestes, Timanaspis, Tuvaspis, Tyriaspis, Tremataspidida, Benneviaspis, Waengsjoeaspis, Thyestiida

Subtaxa: none

Ecology: fast-moving nektonic carnivore