ibero-mesornis

Noun
  1. Sparrow-sized fossil bird of the Cretaceous period having a vestigial tail;
    Found in Spain;
    Considered possibly the third most primitive of all birds (synset 101519677)
    is a type of: bird - warm-blooded egg-laying vertebrates characterized by feathers and forelimbs modified as wings
    belongs to: genus ibero-mesornis - a genus of fossil bird of the subclass Archaeornithes

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