Predentary

Predentary

The predentary is an 'extra' bone in the front of the lower jaw, which extended the dentary (the main lower jaw bone). It is found in the fossilised remains of ornithischian dinosaurs, which were herbivorous. The predentary coincided with the premaxilla in the upper jaw. Together they formed a beak-like apparatus used to clip off plant material. In ceratopsian dinosaurs, it opposes the rostral.


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  • predentary — “+ adjective Etymology: pre + dentary : of, relating to, or being a bone in the lower jaw of some dinosaurs that is situated in front of the dentary bones * * * predentary, dentate etc.: pre A. 4, B. 3 …   Useful english dictionary

  • predentary — a neomorph bone found in Istiophoridae …   Dictionary of ichthyology

  • predentary — noun An extension to the dentary in the jawbone of some dinosaurs …   Wiktionary

  • predentary — pre·dentary …   English syllables

  • dinosaur — /duy neuh sawr /, n. 1. any chiefly terrestrial, herbivorous or carnivorous reptile of the extinct orders Saurischia and Ornithischia, from the Mesozoic Era, certain species of which are the largest known land animals. 2. something that is… …   Universalium

  • Ornithischia — Ornithischians Temporal range: Late Triassic–Late Cretaceous, 228–65 Ma …   Wikipedia

  • Claorhynchus — Temporal range: Late Cretaceous Scientific classification Kingdom: Animalia Phylum: Chordata Class …   Wikipedia

  • Heterodontosauridae — Taxobox image width=250px image caption = Cast of the type specimen of Heterodontosaurus tucki name = Heterodontosaurids fossil range = Late Triassic Cretaceous regnum = Animalia phylum = Chordata classis = Sauropsida superordo = Dinosauria ordo …   Wikipedia

  • Sacisaurus — Taxobox name = Sacisaurus fossil range = Late Triassic regnum = Animalia phylum = Chordata classis = Sauropsida infraclassis = Archosauromorpha unranked ordo = Ornithodira unranked familia = Dinosauriformes genus = Sacisaurus genus authority=… …   Wikipedia

  • Jaw — The jaw is either of the two opposable structures forming, or near the entrance to the mouth. The term jaws is also broadly applied to the whole of the structures constituting the vault of the mouth and serving to open and close it and is part of …   Wikipedia

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