Arthropods from region Richmond (Little River County, Arkansas, USA) Arachnida Lamarck, 1801 Arachnids | 7 10 10 | Families Genera Species | Taxom
| Branchiopoda Latreille, 1817 Branchiopods, Brine shrimps, Daphnia, Fairy shrimps and Water fleas, Phyllopods | 1 1 1 | Families Genera Species | Taxom
| Entognatha Stummer-Traunfels, 1891 Entognathids | 4 6 0 | Families Genera Species | Taxom
| Insecta Linnaeus, 1758 Insects, True insects | 83 181 207 | Families Genera Species | Taxom
| Malacostraca Latreille, 1802 Higher Crustaceans, Malacostracans | 5 7 8 | Families Genera Species | Taxom
| Ostracoda Latreille, 1802 Mussel shrimps, Ostracods, Seed Shrimps | 1 1 0 | Families Genera Species | Taxom
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