Pteraspidiformes

Pteraspidiformes Temporal range: Upper Silurian-Devonian
Lamiaspis longiripa
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Infraphylum:	Agnatha
Class:	†Pteraspidomorphi
Subclass:	†Heterostraci
Order:	†Pteraspidiformes Berg 1940
Suborders and families
Anchipteraspididae Podolaspididae Protopteraspididae Psammosteida Drepanaspididae Guerichosteidae Obrucheviidae Psammolepididae Psammosteidae Pycnosteidae Pteraspidoidei Gigantaspididae Larnovaspididae Pteraspididae Protaspididae Rhinopteraspididae Skalviaspididae

Pteraspidiformes is an extinct order of heterostracan agnathan vertebrates known from extensive fossil remains primarily from Early Devonian strata of Europe and North America, and from Upper Silurian Canada.