Pteraspidomorpha

Pteraspidomorpha includes 30 children:

• Amphiaspidiformes
• Astrapidiformes
• Astraspida
• Astraspidiformes
• Corvaspidiformes
• Cyathaspidida
• Cyathaspidida
• Cyathaspidiformes
• Cyathaspidiformes
• Heterostraci
• NO_ORDER_SPECIFIED
• Olbiaspidida
• Psammosteiformes
• Psammosteiformes
• Pteraspidiformes
• Pteraspidiformes
• Tesseraspidiformes
• Traquairaspidida
• Traquairaspidiformes
• Traquairaspidiformes
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