Arthropods from region Medstead (Division No. 16, Saskatchewan, Canada) Arachnida Lamarck, 1801 Arachnids | 3 4 4 | Families Genera Species | Taxom
| Branchiopoda Latreille, 1817 Branchiopods, Brine shrimps, Daphnia, Fairy shrimps and Water fleas, Phyllopods | 1 1 1 | Families Genera Species | Taxom
| Entognatha Stummer-Traunfels, 1891 Entognathids | 2 2 1 | Families Genera Species | Taxom
| Insecta Linnaeus, 1758 Insects, True insects | 69 135 120 | Families Genera Species | Taxom
| Malacostraca Latreille, 1802 Higher Crustaceans, Malacostracans | 4 5 6 | Families Genera Species | Taxom
| Ostracoda Latreille, 1802 Mussel shrimps, Ostracods, Seed Shrimps | 4 7 11 | Families Genera Species | Taxom
| Trilobita ♰ Walch, 1771 Trilobites | 2 2 1 | Families Genera Species | Taxom
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