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'''Ornithischia''' or '''Predentata''' is one of two major orders of [[Dinosaur|dinosaurs]], and includes both bipedal and quadrupedal herbivorous animals, all of which share a pelvic structure similar to that of birds.

'''Ornithischia''' or '''Predentata''' is one of two major orders of [[dinosaur]]s, and includes both bipedal and quadrupedal herbivorous animals, all of which share a pelvic structure similar to that of birds.

==Description==

==Description==

The primary characteristic is the pelvic girdle, comprised of ilium, the ischium, and the pubis.  The process of the pubis points to the rear - as in birds - to allow for a long digestive tract.  A further shared characteristic is the presence of a predentary bone at the tip of the lower jaw, hence the other name for the order<ref>http://users.tamuk.edu/kfjab02/dinos/VPORNITHO.htm</ref>. All ornithischians also bear a beak due to the rostral tip of premaxilla being toothless.

The primary characteristic is the pelvic girdle, comprised of ilium, the ischium, and the pubis.  The process of the pubis points to the rear - as in birds - to allow for a long digestive tract.  A further shared characteristic is the presence of a predentary bone at the tip of the lower jaw, hence the other name for the order.<ref>http://users.tamuk.edu/kfjab02/dinos/VPORNITHO.htm</ref>  All ornithischians also bear a beak due to the rostral tip of premaxilla being toothless.

==Taxonomy==

==Taxonomy==

==References==

==References==

[[Category:Dinosaurs]]

[[Category:Dinosaurs]]