| Gastornis(noun, creature, geohistory, paleocene) |
| Gavialidae(noun, creature, geohistory, eocene) |
| Glaucosoma(noun, creature, geohistory, eocene) |
| Gnomefish(noun, creature, geohistory, eocene) |
| Gopher(noun, creature, geohistory, eocene) |
| Halfbeak(noun, creature, geohistory, eocene) |
| Hanleya(noun, creature, geohistory, oligocene) |
| Hapalodectidae(noun, creature, geohistory, paleocene) |
| Hemipristis(noun, creature, geohistory, eocene) |
| Henricosborniidae(noun, creature, geohistory, paleocene) |
| Hoatzin(noun, creature, geohistory, eocene) |
| Holcorpa(noun, creature, geohistory, ypresian) |
| Holosteus(noun, creature, geohistory, ypresian) |
| Hyaenodontidae(noun, creature, geohistory, paleocene) |
| Hyracotherium(noun, creature, geohistory, ypresian) |
| Hystricognathi(noun, creature, geohistory, eocene) |
| Hystricomorpha(noun, creature, geohistory, eocene) |
| Inocelliidae(noun, creature, geohistory, eocene) |
| Interatheriidae(noun, creature, geohistory, paleocene) |
| Isotemnidae(noun, creature, geohistory, paleocene) |