Arthropods from region Columbia River (Lincoln County, Washington, USA) Arachnida Lamarck, 1801 Arachnids | 7 7 9 | Families Genera Species | Taxom
| Branchiopoda Latreille, 1817 Branchiopods, Brine shrimps, Daphnia, Fairy shrimps and Water fleas, Phyllopods | 5 10 9 | Families Genera Species | Taxom
| Insecta Linnaeus, 1758 Insects, True insects | 38 88 101 | Families Genera Species | Taxom
| Malacostraca Latreille, 1802 Higher Crustaceans, Malacostracans | 37 47 55 | Families Genera Species | Taxom
| Maxillopoda Dahl, 1956 Maxillopods | 10 10 10 | Families Genera Species | Taxom
| Ostracoda Latreille, 1802 Mussel shrimps, Ostracods, Seed Shrimps | 3 3 3 | Families Genera Species | Taxom
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