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Order: Ammonitida
The entire skull weighs only 15 pounds
Ogam (Ogham)
A skull of Maiasaura
This is the largest Ammonite cast available on the web
Triceratops horridus, horn on base Quetzalcoatlus Order: AmmonitidaTriceratops horridus Brow horn This horn is 28 inches long and 23 inches in circumference near the base. It is from the Cretaceous age Lance Formation of Wyoming. Just look at all of the blood grooves on this fantastic horn. Like antlers and horns on modern day mammals, Triceratops horns were probably used more for show (and thus mate selection) than for defense. But if you would rather forget we said that and instead reminisce on the more romantic T.