| Henricosborniidae(noun, geohistory, eocene, extinction) |
| Hercoglossidae(noun, geohistory, extinction, oligocene) |
| Hoanghoniinae(noun, geohistory, eocene, extinction) |
| Holosteus(noun, geohistory, extinction, oligocene) |
| Horusornithidae(noun, geohistory, eocene, extinction) |
| Hyaenodontidae(noun, geohistory, eocene, extinction) |
| Hyopsodontidae(noun, geohistory, eocene, extinction) |
| Hyporhina(noun, geohistory, extinction, oligocene) |
| Hyposaurus(noun, fauna, extinction, paleogene) |
| Kogaionidae(noun, geohistory, extinction, paleocene) |
| Lambdopsalidae(noun, geohistory, eocene, extinction) |
| Leptauchenia(noun, geohistory, extinction, oligocene) |
| Leptictida(noun, geohistory, extinction, oligocene) |
| Lopez de Bertodano Formation(expression, geohistory, formation, paleogene) |
| Lutetian extinction(expression, extinction, period, geochronology) |
| Macginitiea(noun, geohistory, eocene, extinction) |
| Madtsoia(noun, fauna, extinction, paleogene) |
| Madtsoiidae(noun, fauna, extinction, paleogene) |
| Malargue Group(expression, group, boundary, paleogene) |
| Mesosuchia(noun, geohistory, eocene, extinction) |