Cyathaspididae

Cyathaspididae is an extinct family in the heterostracan order Cyathaspidiformes.^[1][2]

Vernonaspis sp. mass mortality. Late Silurian, Cape Storm Formation, Cornwallis Island, Nunavut (Canada).

Cyathaspididae
Reconstruction of Cyathaspis banksii
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Subphylum:	Vertebrata
Infraphylum:	Agnatha
Class:	†Pteraspidomorpha
Subclass:	†Heterostraci
Order:	†Cyathaspidiformes
Clade:	†Cyathaspidida
Family:	†Cyathaspididae Romer, 1945
Type genus
†Cyathaspis Lankester
Subfamilies
Ctenaspinae Cyathaspidinae Poraspinae
Synonyms
Cyathaspidei Kiaer

Cyathaspididae contains most of the genera originally contained within Cyathaspididae, as well as those genera contained within Irregularaspididae, and Poraspididae. In addition to the type genus, †Cyathaspis, Cyathaspididae contains the following genera: †Americaspis, †Archegonaspis, †Capitaspis, †Dikenaspis, †Dinaspidella, †Homaspidella, †Irregulareaspis, †Nahanniaspis, †Pionaspis, †Poraspis, †Ptomaspis, †Seretaspis, †Steinaspis, †Torpedaspis and †Vernonaspis.

Pionaspis amplissima cast. Early Devonian, Mackenzie Mountains, Northwest Territories (Canada).