Arthropods from region Maine (USA) Arachnida Lamarck, 1801 Arachnids | 75 309 655 | Families Genera Species | Taxom
| Branchiopoda Latreille, 1817 Branchiopods, Brine shrimps, Daphnia, Fairy shrimps and Water fleas, Phyllopods | 7 11 15 | Families Genera Species | Taxom
| Chilopoda Latreille, 1817 Centiped, Centipede, Centipedes, Centipeds, Chilopods | 6 7 8 | Families Genera Species | Taxom
| Diplopoda De Blainville in Gervais, 1844 Diplopods, Millepedes, Millipede, Millipedes | 9 12 13 | Families Genera Species | Taxom
| Entognatha Stummer-Traunfels, 1891 Entognathids | 11 24 29 | Families Genera Species | Taxom
| Insecta Linnaeus, 1758 Insects, True insects | 426 3330 7483 | Families Genera Species | Taxom
| Malacostraca Latreille, 1802 Higher Crustaceans, Malacostracans | 101 202 282 | Families Genera Species | Taxom
| Maxillopoda Dahl, 1956 Maxillopods | 51 78 106 | Families Genera Species | Taxom
| Merostomata Woodward, 1866 Horseshoe crabs, Merostomates | 2 2 1 | Families Genera Species | Taxom
| Ostracoda Latreille, 1802 Mussel shrimps, Ostracods, Seed Shrimps | 8 19 11 | Families Genera Species | Taxom
| Pycnogonida Latreille, 1810 Pycnogonids, Sea Spider, Sea Spiders | 5 5 9 | Families Genera Species | Taxom
| Symphyla Ryder, 1880 Dwarf Centipedes, Pseudocentipedes, Symphylans, Symphylids | 1 1 1 | Families Genera Species | Taxom
| Trilobita ♰ Walch, 1771 Trilobites | 17 23 11 | Families Genera Species | Taxom
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