†order Tremataspidiformes Berg 1937 (vertebrate)
Petromyzontida - Tremataspidiformes
Parent taxon: Osteostraci according to T. Märss et al. 2014
Sister taxa: Aachenaspis, Fieldingaspis, Meelaidaspis, Ohesaareaspis, Tuvaspis, Camptaspis, Tremataspidida, Benneviaspidiformes, Thyestiida, Waengsjoeaspis, Yvonaspis, Zenaspidida, Cornuata, Ateleaspidiformes, Benneviaspidida
Subtaxa: Tahulaspis Tremataspididae
Ecology: fast-moving nektonic carnivore
Distribution:
• Devonian of the Russian Federation (1 collection), the United Kingdom (1)
• Silurian to Devonian of the Russian Federation (1)
• Silurian of Estonia (8), the Russian Federation (2), Sweden (4), the United Kingdom (3)
Total: 20 collections including 44 occurrences