Silvisaurus (Greek for "woodland lizard"); pronounced SILL-vih-SORE-us
Woodlands of North America
Middle Cretaceous (110-100 million years ago)
Size and Weight:
About 13 feet long and one ton
Armor plating; spines along sides
The euphoniously named Silvisaurus (Greek for "woodland lizard") was a member of the subgroup of ankylosaurs known as nodosaurs, squat, armored, four-legged dinosaurs lacking clubs on their tails. To judge by the single specimen identified so far (in a Kansas fossil bed), the middle Cretaceous Silvisaurus was an especially primitive member of its breed, closely related to other early nodosaurs like Sauropelta and Pawpawsaurus.