Arthropods from region Decatur (Morgan County, Alabama, USA) Arachnida Lamarck, 1801 Arachnids | 4 4 5 | Families Genera Species | Taxom
| Branchiopoda Latreille, 1817 Branchiopods, Brine shrimps, Daphnia, Fairy shrimps and Water fleas, Phyllopods | 1 1 0 | Families Genera Species | Taxom
| Diplopoda De Blainville in Gervais, 1844 Diplopods, Millepedes, Millipede, Millipedes | 2 3 2 | Families Genera Species | Taxom
| Entognatha Stummer-Traunfels, 1891 Entognathids | 2 2 0 | Families Genera Species | Taxom
| Insecta Linnaeus, 1758 Insects, True insects | 92 277 319 | Families Genera Species | Taxom
| Malacostraca Latreille, 1802 Higher Crustaceans, Malacostracans | 5 6 9 | Families Genera Species | Taxom
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