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21186 Museum Grade Soft Bodied Aglaspid (Tremaglaspis unite) Lower Ordovician Fezouata Fm Pharyngeal Teeth the horns and spines during the horns and spines during the preparation process have been fractured and glued again each tooth had one barb Aglaspidida is an extinct order of aquatic arthropods that were once regarded as primitive chelicerates but the rich soft bodied Fezouata biota paints a different evolutionary picture
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