Montana - Wyoming - US

The Lower Cretaceous Cloverly Formation (Aptian-Albian) is exposed in the Bighorn Basin of south-central Montana and northern Wyoming. It has an average thickness of approximately 90 m and consits of predominatly veriegated claystones with channel-filling sandstones and conglomeratic sandstones. The top of the Cloverly is marked by a transgressive marine facies, deposited by a southward-encroaching inland sea.

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Deinonychus antirrhopus - Montana Wyoming - Coelurosauria Dromaeosauridae - Cretaceous Late Aptian Albian

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Megadontosaurus - Nomen Nudem

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Microvenator celer - Montana Wyoming - Tetanurae Coelurosauria - Cretaceous Early Aptian Albian

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Peltosaurus [preoccupied] Montana Wyoming - - Ankylosauria Nodosauridae - Cretaceous Early Cretaceous Late Aptian Albian Cenomanian

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Rugocaudia cooneyi - Montana - Sauropoda Titanosauria - Cretaceous Early Aptian Albian

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Sauropelta edwardsorum - Montana Wyoming - Ankylosauria Nodosauridae - Cretaceous Early Cretaceous Late Aptian Albian Cenomanian

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Tatankacephalus cooneyrum - Montana - Ankylosauria Ankylosauridae - Cretaceous Late Aptian Albian

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Tenontosaurus tilletorum - Montana Wyoming - Iguanodontia Iguanodontidae - Cretaceous Early Aptian

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Zephyrosaurus schaffi - Montana - Ornithopoda Hypsilophodontidae - Cretaceous Early Aptian

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Brachiosaurid indet. (= ? Pleurocoelus sp.) - Montana Wyoming - Sauropoda Brachiosauridae - Cretaceous Early Aptian Albian

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Ornithomimid indet. (= ?Ornithomimus velox) - Montana Wyoming - Theropoda Ornithomimidae - Cretaceous Early Aptian Albian

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Theropoda indet. - Montana Wyoming - Theropoda - Cretaceous Early Aptian Albian

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Sauropoda indet. - Wyoming - Sauropoda - Cretaceous Early Aptian Albian

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