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Genus Mononychus
- authorities disagree over whether to classify the genus as bird or dinosaur
Genus Chronoperates
- a reptile genus of Therapsida
Genus Exaeretodon
- a genus of reptiles of the division Cynodontia
Genus Ischigualastia
- early reptile found in Argentina
Genus Edaphosaurus
- type genus of the Edaphosauridae
Genus Dimetrodon
- a reptile genus of Pelycosauria
Genus Pterodactylus
- a reptile genus of Pterodactylidae
Genus Ichthyosaurus
- type genus of the Ichthyosauridae
Genus Stenopterygius
- a reptile genus of Ichthyosauridae
Genus Plesiosaurus
- a reptile genus of suborder Plesiosauria