Avialae
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Avialae is a clade containing the only living dinosaurs, the birds, and their closest relatives. It is usually defined as all theropod dinosaurs more closely related to birds than to deinonychosaurs,
Jeholornis prima NMNS
A special composite of birds
Patagonykuspuertai
Confuciusornis plumage pattern
Archaeopteryx
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Archaeopteryx, sometimes referred to by its German name, "Urvogel " is an extinct genus of bird-like dinosaurs. The genus name derives from the Ancient Greek ἀρχαῖος, meaning 'ancient', and πτέρυξ, me
Avialae
…all theropod dinosaurs more closely related to birds (Aves) than to deinonychosaurs, though alternative definitions are occasionally used (see below). Archaeopteryx lithographica, from the late Jurassic Period Solnhofen Formation of Germany, is usually considered the earliest known avialan which may have had the capability of…
Archaeopteryx lithographica
The single feather
Cast of the Maxberg Specimen
Eichstätt Specimen, once considered a distinct genus, Jurapteryx