Archaeornithes (extinct subclass)

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Scope note
Extinct subclass of birds having teeth in both jaws, a long, feathered tail, by being less specialized for flight than modern birds, a body elongated and reptilelike, forelimbs with three clawed digits, a small brain and eyes, and bones that are not filled with air (nonpneumatic).
Archaeornithes
Accepted term: 29-Apr-2024