Arthropods from region Severn (Simcoe County, Ontario, Canada) Arachnida Lamarck, 1801 Arachnids | 9 10 8 | Families Genera Species | Taxom
| Branchiopoda Latreille, 1817 Branchiopods, Brine shrimps, Daphnia, Fairy shrimps and Water fleas, Phyllopods | 2 2 2 | Families Genera Species | Taxom
| Dinocaridida Collins, 1996 Wedgeheads | 2 5 0 | Families Genera Species | Taxom
| Entognatha Stummer-Traunfels, 1891 Entognathids | 3 3 1 | Families Genera Species | Taxom
| Insecta Linnaeus, 1758 Insects, True insects | 148 389 392 | Families Genera Species | Taxom
| Malacostraca Latreille, 1802 Higher Crustaceans, Malacostracans | 16 17 15 | Families Genera Species | Taxom
| Marrellomorpha ♰ Beurlen, 1930 Marrellomorph Arthropods | 1 1 1 | Families Genera Species | Taxom
| Maxillopoda Dahl, 1956 Maxillopods | 1 1 1 | Families Genera Species | Taxom
| Ostracoda Latreille, 1802 Mussel shrimps, Ostracods, Seed Shrimps | 1 1 0 | Families Genera Species | Taxom
| Thylacocephala ♰ Pinna & al., 1982 Bivalve arthropods | 0 1 1 | Families Genera Species | Taxom
| Trilobita ♰ Walch, 1771 Trilobites | 10 15 12 | Families Genera Species | Taxom
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