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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Merriam-Webster unabridged
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Time Traveler for Anaspida
The first known use of Anaspida was in 1893
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