• Nodosaurids which had spikes running along the sides of their bodies, had pear-shaped heads, a toothless horny beak, leaf-shaped teeth in the cheeks, and lacked a clubbed-tail. They lived from the mid-Jurassic period through the Cretaceous period. Nodosaurids included Acanthopholis, Brachypodosaurus, Chassternbergia, Cryptodraco, Dracopelta, Edmontonia, Hoplitosaurus, Hylaeosaurus, Minmi, Nodosaurus, Panoplosaurus, Polacanthus, Sarcolestes, Sauropelta, Silvisaurs, etc.)
• Ankylosaurids which had a tail club, a wide skull, and massive legs. They lived during the Cretaceous period. Ankylosaurids included Ankylosaurus, Amtosaurus, Euoplocephalus, Pinacosaurus, Saichania, Sauroplites, Tarchia, etc.

Nodosaurids
ACANTHOPHOLIS 115-91 mya	HYLAEOSAURUS 135-119 mya	MINMI 119-113 mya

NODOSAURUS 113-98 mya

PANOPLOSAURUS 76-73 mya.

POLACANTHUS 132-100 mya	SAUROPELTA 116-91 mya
Other Nodosaurids include: Brachypodosaurus, Chassternbergia, Crataeomus, Cryptodraco, Danubiosaurus, Denversaurus, Dracopelta, Edmontonia, Hoplitosaurus, Polcanthoides, Polacanthus, Priconodon, Priodontognathus, Sarcolestes, Silvisaurus, Struthiosaurus, Vectensia.

Ankylosaurids
ANKYLOSAURUS 70-65 mya	EUOPLOCEPHALUS 70-65 mya
Other Ankylosaurids include: Amtosaurus, Dyoplosaurus, Heishansaurus, Maleevus, Peishansaurus, Pinacosaurus, Saishania, Sauroplites, Shamosaurus, Stegosaurides, Tarchia, Tenchisaurus.

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