†order Thyestiformes (vertebrate)
Parent taxon: Osteostraci according to R. van der Laan 2019
Sister taxa: Ateleaspidiformes, Benneviaspidida, Benneviaspidiformes, Camptaspis, Cephalaspidiformes, Cornuata, Thyestiida, Tremataspidida, Tremataspidiformes, Waengsjoeaspis, Yvonaspis, Zenaspidida
Subtaxa: Kiaeraspididae Procephalaspididae Thyestidae Tremataspididae Witaaspididae
Ecology:
Distribution:
• Devonian of Norway (2 collections), the Russian Federation (2), Svalbard and Jan Mayen (10), the United Kingdom (2)
• Silurian to Devonian of the Russian Federation (1)
• Silurian of Estonia (8), the Russian Federation (2), Sweden (5), the United Kingdom (4)
Total: 36 collections including 78 occurrences