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. lindstromi Kiaer & 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

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

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

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