Arthropods from region Georgetown (El Dorado County, California, USA) Arachnida Lamarck, 1801 Arachnids | 5 6 3 | Families Genera Species | Taxom
| Entognatha Stummer-Traunfels, 1891 Entognathids | 3 4 0 | Families Genera Species | Taxom
| Insecta Linnaeus, 1758 Insects, True insects | 104 262 244 | Families Genera Species | Taxom
| Malacostraca Latreille, 1802 Higher Crustaceans, Malacostracans | 17 18 12 | Families Genera Species | Taxom
| Maxillopoda Dahl, 1956 Maxillopods | 2 2 1 | Families Genera Species | Taxom
| Ostracoda Latreille, 1802 Mussel shrimps, Ostracods, Seed Shrimps | 2 2 1 | Families Genera Species | Taxom
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