Arthropods from region Sanders County (Montana, USA) Arachnida Lamarck, 1801 Arachnids | 26 52 78 | Families Genera Species | Taxom
| Branchiopoda Latreille, 1817 Branchiopods, Brine shrimps, Daphnia, Fairy shrimps and Water fleas, Phyllopods | 3 3 3 | Families Genera Species | Taxom
| Chilopoda Latreille, 1817 Centiped, Centipede, Centipedes, Centipeds, Chilopods | 1 1 1 | Families Genera Species | Taxom
| Diplopoda De Blainville in Gervais, 1844 Diplopods, Millepedes, Millipede, Millipedes | 3 5 5 | Families Genera Species | Taxom
| Entognatha Stummer-Traunfels, 1891 Entognathids | 3 4 2 | Families Genera Species | Taxom
| Insecta Linnaeus, 1758 Insects, True insects | 181 751 1147 | Families Genera Species | Taxom
| Malacostraca Latreille, 1802 Higher Crustaceans, Malacostracans | 12 12 12 | Families Genera Species | Taxom
| Maxillopoda Dahl, 1956 Maxillopods | 1 1 1 | Families Genera Species | Taxom
| Ostracoda Latreille, 1802 Mussel shrimps, Ostracods, Seed Shrimps | 3 4 0 | Families Genera Species | Taxom
| Trilobita ♰ Walch, 1771 Trilobites | 11 25 6 | Families Genera Species | Taxom
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