Cyathaspididae

 ( Cyathaspidida ) 

Cyathaspididae is an extinct family in the Heterostraci order Cyathaspidiformes.The Classification and Evolution of the Heterostraci. L. Beverly Tarlo, Acta Palaeontologica Polonica, 1962 mass mortality. Late Silurian, Cape Storm Formation, Cornwallis Island, Nunavut (Canada). ]]

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.