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Ctenaspidae

Ctenaspidae
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Pteraspidomorphi
Subclass: Heterostraci
Order: Cyathaspidiformes
(unranked): Cyathaspidida
Family: Ctenaspidae
Genera

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Ctenaspidae is a family of extinct cyathaspidiform heterostracan agnathans in the suborder Cyathaspidida.

If Amphiaspidida can be ignored as a daughter-taxon, the family Ctenaspidae contains Ctenaspis and its various sister-taxa originally contained within both Ctenaspididae and Ctenaspididae, including Allocryptaspis, Alainaspis, Zaphoctenaspis, Arctictenaspis, and Boothiaspis, which was first described as a "Canadian amphiaspid."



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Wikipedia

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