Arthropods from region Thunder Bay District (Northwestern Ontario, Ontario, Canada) Arachnida Lamarck, 1801 Arachnids | 30 63 74 | Families Genera Species | Taxom
| Branchiopoda Latreille, 1817 Branchiopods, Brine shrimps, Daphnia, Fairy shrimps and Water fleas, Phyllopods | 10 18 22 | 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 | 2 3 3 | Families Genera Species | Taxom
| Entognatha Stummer-Traunfels, 1891 Entognathids | 6 10 9 | Families Genera Species | Taxom
| Insecta Linnaeus, 1758 Insects, True insects | 290 1443 1915 | Families Genera Species | Taxom
| Malacostraca Latreille, 1802 Higher Crustaceans, Malacostracans | 28 33 42 | Families Genera Species | Taxom
| Maxillopoda Dahl, 1956 Maxillopods | 10 18 23 | Families Genera Species | Taxom
| Ostracoda Latreille, 1802 Mussel shrimps, Ostracods, Seed Shrimps | 21 42 37 | Families Genera Species | Taxom
| Trilobita ♰ Walch, 1771 Trilobites | 18 25 5 | Families Genera Species | Taxom
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