ornithischia defined in 1951 yearornithischia - ornithischia;
ornithischia - Fossil order ofReptilia, formerly part of order Dino-sauria which is now divided into Ornithischia and Saurischia, Lived during Mesozoic. Contains only herbivorous species and none reaching the gigantic size of the biggest Saurischia.
near ornithischia in Knolik
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