| Bartonian first appearance(expression, geohistory, eocene, period) |
| Chattian first appearance(expression, geohistory, period, oligocene) |
| Danian first appearance(expression, geohistory, period, paleocene) |
| Extant Chattian first appearance(expression, geogistory, period, oligocene) |
| Extant Eocene first appearance(expression, geohistory, eocene, period) |
| Extant Lutetian first appearance(expression, appearance, eocene, period) |
| Extant Paleocene first appearance(expression, geohistory, period, paleocene) |
| Extant Rupelian first appearance(expression, geogistory, period, oligocene) |
| Extant Thanetian first appearance(expression, geohistory, period, paleocene) |
| Extant Ypresian first appearance(expression, appearance, eocene, period) |
| Lutetian first appearance(expression, geohistory, eocene, period) |
| Nebrius(noun, creature, geohistory, paleocene) |
| Nebrius ferrugineus(expression, creature, geohistory, paleocene) |
| Necturus(noun, creature, geohistory, paleocene) |
| Negaprion(noun, creature, eocene, geogistory) |
| Nephrops(noun, creature, geohistory, oligocene) |
| New World vulture(expression, creature, geohistory, eocene) |
| Notoplax(noun, creature, geohistory, oligocene) |
| Old World monkey(expression, creature, geohistory, oligocene) |
| Old World silverside(expression, creature, geohistory, eocene) |