Arthropods from region Iroquois County (Central Illinois, Illinois, USA) Arachnida Lamarck, 1801 Arachnids | 41 96 119 | 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 | 6 9 9 | Families Genera Species | Taxom
| Entognatha Stummer-Traunfels, 1891 Entognathids | 10 21 8 | Families Genera Species | Taxom
| Insecta Linnaeus, 1758 Insects, True insects | 261 1253 1654 | Families Genera Species | Taxom
| Malacostraca Latreille, 1802 Higher Crustaceans, Malacostracans | 22 30 39 | Families Genera Species | Taxom
| Maxillopoda Dahl, 1956 Maxillopods | 4 4 3 | Families Genera Species | Taxom
| Ostracoda Latreille, 1802 Mussel shrimps, Ostracods, Seed Shrimps | 1 1 1 | Families Genera Species | Taxom
| Thylacocephala ♰ Pinna & al., 1982 Bivalve arthropods | 1 1 0 | Families Genera Species | Taxom
| Trilobita ♰ Walch, 1771 Trilobites | 8 9 4 | Families Genera Species | Taxom
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