Cyathaspis

Cyathaspis Temporal range: Wenlock to Ludlow
Reconstruction of C. banksii
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Pteraspidomorphi
Order:	Cyathaspidiformes
Family:	Cyathaspidae
Genus:	Cyathaspis Lankester
Type species
Pteraspis banksii Huxley and Salter, 1856
Species
C. acadica(Matthew 1886) C. banksii(Huxley & Salter 1856) C. barroisi(Leriche 1906) C. lindstromiKiaer & Heintz 1935 C. ludensis C. macculloughi(Woodward 1891)

Cyathaspis is the type genus of the heterostracan order Cyathaspidiformes. ^[1] Fossils are found in late Silurian strata in the Cunningham Creek Formation, New Brunswick, Canada and Europe, especially in the Downton Castle Sandstone of Great Britain and Gotland, Sweden.^{[ citation needed ]} The living animal would have looked superficially like a tadpole, albeit covered in bony plates composed of the tissue aspidine, which is unique to heterostracan armor.^{[ citation needed ]}

Cyathaspis ludensis is the earliest British vertebrate fossil.^{[ citation needed ]} It was found in rocks at Leintwardine in Herefordshire, a noted fossil locality.^{[ citation needed ]}

References

1. Matthew, George Frederic (1888). On Some Remarkable Organisms of the Silunian and Devonian Rocks in Southern New Brunswick. pp. 52–54.