Arthropods from region Jacksonville (Baltimore County, Maryland, USA) Arachnida Lamarck, 1801 Arachnids | 1 1 1 | Families Genera Species | Taxom
| Insecta Linnaeus, 1758 Insects, True insects | 12 14 13 | Families Genera Species | Taxom
| Malacostraca Latreille, 1802 Higher Crustaceans, Malacostracans | 17 24 23 | Families Genera Species | Taxom
| Maxillopoda Dahl, 1956 Maxillopods | 2 2 2 | Families Genera Species | Taxom
| Merostomata Woodward, 1866 Horseshoe crabs, Merostomates | 1 1 1 | Families Genera Species | Taxom
| Ostracoda Latreille, 1802 Mussel shrimps, Ostracods, Seed Shrimps | 2 2 1 | Families Genera Species | Taxom
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