Main classes
2X
Divisions
Sections
- 560Paleontology; paleozoology
- 561Paleobotany; fossil microorganisms
- 562Fossil invertebrates
- 563Fossil marine & seashore invertebrates
- 564Fossil mollusks & molluscoids
- 565Fossil arthropods
- 566Fossil chordates
- 567Fossil cold-blooded vertebrates; fossil fishes
- 568Fossil birds
- 569Fossil mammals