Arthropods from region Decatur County (Iowa, USA) Arachnida Lamarck, 1801 Arachnids | 26 51 60 | Families Genera Species | Taxom
| Chilopoda Latreille, 1817 Centiped, Centipede, Centipedes, Centipeds, Chilopods | 3 3 3 | Families Genera Species | Taxom
| Diplopoda De Blainville in Gervais, 1844 Diplopods, Millepedes, Millipede, Millipedes | 5 6 6 | Families Genera Species | Taxom
| Entognatha Stummer-Traunfels, 1891 Entognathids | 8 23 12 | Families Genera Species | Taxom
| Insecta Linnaeus, 1758 Insects, True insects | 208 903 1218 | Families Genera Species | Taxom
| Malacostraca Latreille, 1802 Higher Crustaceans, Malacostracans | 17 20 25 | Families Genera Species | Taxom
| Maxillopoda Dahl, 1956 Maxillopods | 3 3 3 | Families Genera Species | Taxom
| Ostracoda Latreille, 1802 Mussel shrimps, Ostracods, Seed Shrimps | 3 3 1 | Families Genera Species | Taxom
| Trilobita ♰ Walch, 1771 Trilobites | 10 15 5 | Families Genera Species | Taxom
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