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Anaspida

plural noun An·as·pi·da \ -pədə \

Definition of Anaspida

:a class or other division of primitive fishlike ostracoderms having a heterocercal tail and a covering of small elongated scales and known from Silurian-Devonian transition beds of Europe and America

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Origin and Etymology of anaspida

New Latin, from an- + -aspida (from Greek aspid-, aspis shield)

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