protaspis

noun
pro·​tas·​pis | \ -pə̇s\
plural protaspides\ -​pəˌdēz \

Definition of protaspis

: the minute discoid or oval first larval form of a trilobite that has a well-marked axial lobe, large head region, and but little segmentation

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History and Etymology for protaspis

New Latin, from prot- + -aspis

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