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Agnatha British & World English

A group of primitive jawless vertebrates which includes the lampreys, hagfishes, and many fossil fishlike forms

Agnatha in Agnatha British & World English

A group of primitive jawless vertebrates which includes the lampreys, hagfishes, and many fossil fishlike forms

Agnatha in ostracoderm British & World English

An early jawless fossil fish of the Cambrian to Devonian periods, having a heavily armoured body

Agnatha in cyclostome British & World English

An eel-like jawless vertebrate with a round sucking mouth, of a former group that included the lampreys and hagfishes