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Extinct order of jawless vertebrates
Answer for the clue "Extinct order of jawless vertebrates ", 8 letters:
anaspida
Word definitions for anaspida in dictionaries
Wikipedia
Word definitions in Wikipedia
Anaspida ("without shield") is an extinct group of primitive jawless vertebrates that lived primarily during the Silurian period, and became extinct soon after the start of the Devonian . They were once classically regarded as the ancestors of lampreys. ...