Arthropods from region Union Parish (Louisiana, USA) Arachnida Lamarck, 1801 Arachnids | 8 9 8 | 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 | 8 12 1 | Families Genera Species | Taxom
| Insecta Linnaeus, 1758 Insects, True insects | 137 365 431 | Families Genera Species | Taxom
| Malacostraca Latreille, 1802 Higher Crustaceans, Malacostracans | 41 60 60 | Families Genera Species | Taxom
| Maxillopoda Dahl, 1956 Maxillopods | 3 4 4 | Families Genera Species | Taxom
| Ostracoda Latreille, 1802 Mussel shrimps, Ostracods, Seed Shrimps | 2 2 0 | Families Genera Species | Taxom
| Pycnogonida Latreille, 1810 Pycnogonids, Sea Spider, Sea Spiders | 1 1 1 | Families Genera Species | Taxom
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