Arthropods from region Rock Creek (Whitman County, Washington, USA) Arachnida Lamarck, 1801 Arachnids | 11 19 19 | Families Genera Species | Taxom
| Diplopoda De Blainville in Gervais, 1844 Diplopods, Millepedes, Millipede, Millipedes | 1 1 1 | Families Genera Species | Taxom
| Insecta Linnaeus, 1758 Insects, True insects | 116 392 543 | Families Genera Species | Taxom
| Malacostraca Latreille, 1802 Higher Crustaceans, Malacostracans | 9 13 16 | Families Genera Species | Taxom
| Maxillopoda Dahl, 1956 Maxillopods | 2 5 6 | Families Genera Species | Taxom
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