Arthropods from region Nearctic (Ecozones) Arachnida Lamarck, 1801 Arachnids | 8 28 55 | Families Genera Species | Taxom
| Branchiopoda Latreille, 1817 Branchiopods, Brine shrimps, Daphnia, Fairy shrimps and Water fleas, Phyllopods | 12 62 214 | Families Genera Species | Taxom
| Entognatha Stummer-Traunfels, 1891 Entognathids | 30 176 1195 | Families Genera Species | Taxom
| Insecta Linnaeus, 1758 Insects, True insects | 710 14615 110890 | Families Genera Species | Taxom
| Malacostraca Latreille, 1802 Higher Crustaceans, Malacostracans | 3 7 8 | Families Genera Species | Taxom
| Maxillopoda Dahl, 1956 Maxillopods | 8 27 120 | Families Genera Species | Taxom
| Ostracoda Latreille, 1802 Mussel shrimps, Ostracods, Seed Shrimps | 10 51 203 | Families Genera Species | Taxom
| Symphyla Ryder, 1880 Dwarf Centipedes, Pseudocentipedes, Symphylans, Symphylids | 1 1 1 | Families Genera Species | Taxom
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