Pteraspidomorpha - Cyathaspididae
Alternative spelling: Cyathaspidae
Full reference: J. Kiaer. 1932. The Downtonian and Devonian vertebrates of Spitsbergen. IV, Suborder Cyathaspida. Skrifter Om Svalbard Og Ishavet 52:1-26
Parent taxon: Heterostraci according to R. H. Denison 1963
See also Elliott 2016, Kiaer 1932, Marss and Karatajute-Talimaa 2002, Nelson et al. 2016 and Van Der Laan 2019
Sister taxa: Amphiaspidiformes, Aporemaspis, Ariaspididae, Cardipeltida, Cardipeltidae, Cardipeltiformes, Ceraspidae, Corvaspidida, Corvaspidiformes, Cyathaspida, Cyathaspidiformes, Drepanaspidae, Lepidaspidida, Lepidaspidiformes, Olbiaspidida, Palaeaspidi, Protaspidae, Psammolepis, Psammosteiformes, Pteraspidi, Pteraspidiformes, Strosipherus, Tesseraspidida, Tesseraspidiformes, Thelodontidae, Tolypelepidida, Tolypelepidiformes, Traquairaspidida, Traquairaspidiformes
Subtaxa: Archegonaspis Boothiaspidinae Cyathaspis Dikenaspis Eoarchegonaspis Poraspidinae Ptomaspis Vernonaspis
Type: Cyathaspis
Distribution:
• Devonian of Canada (2: Nunavut collections), France (1), Norway (1), the Russian Federation (2), Ukraine (1), United States (1: California)
• Silurian of Canada (7: New Brunswick, Northwest Territories, Nunavut, Yukon), the Russian Federation (2), the United Kingdom (1), United States (5: New York, Pennsylvania)
Total: 23 collections including 32 occurrences