Pteraspidomorpha - Cyathaspidiformes

Parent taxon: Heterostraci according to R. Van Der Laan 2019

See also Long 2011

Sister taxa: Amphiaspidiformes, Anatolepis, Aporemaspis, Ariaspididae, Cardipeltidae, Cardipeltiformes, Ceraspidae, Corvaspidiformes, Cyathaspidida, Drepanaspidae, Lepidaspidiformes, Olbiaspidida, Palaeaspidi, Protaspidae, Psammolepis, Psammosteiformes, Pteraspidi, Strosipherus, Tesseraspidiformes, Thelodontidae, Tolypelepidiformes, Traquairaspidida, Traquairaspidiformes

Subtaxa: Cyathaspidoidei Hibernaspidoidei Pteraspidiformes Siberiaspidoidei

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Ecology:

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