Arthropods from region Portugal (Iberian Peninsula) Arachnida Lamarck, 1801 Arachnids | 209 863 2636 | Families Genera Species | Taxom
| Branchiopoda Latreille, 1817 Branchiopods, Brine shrimps, Daphnia, Fairy shrimps and Water fleas, Phyllopods | 12 21 26 | Families Genera Species | Taxom
| Chilopoda Latreille, 1817 Centiped, Centipede, Centipedes, Centipeds, Chilopods | 11 26 112 | Families Genera Species | Taxom
| Diplopoda De Blainville in Gervais, 1844 Diplopods, Millepedes, Millipede, Millipedes | 25 62 159 | Families Genera Species | Taxom
| Entognatha Stummer-Traunfels, 1891 Entognathids | 21 106 275 | Families Genera Species | Taxom
| Insecta Linnaeus, 1758 Insects, True insects | 546 5554 13778 | Families Genera Species | Taxom
| Malacostraca Latreille, 1802 Higher Crustaceans, Malacostracans | 219 571 1249 | Families Genera Species | Taxom
| Maxillopoda Dahl, 1956 Maxillopods | 94 228 409 | Families Genera Species | Taxom
| Merostomata Woodward, 1866 Horseshoe crabs, Merostomates | 2 2 2 | Families Genera Species | Taxom
| Ostracoda Latreille, 1802 Mussel shrimps, Ostracods, Seed Shrimps | 45 179 320 | Families Genera Species | Taxom
| Pauropoda Lubbock, 1868 Pauropodans, Pauropods, Progoneates | 1 1 12 | Families Genera Species | Taxom
| Pycnogonida Latreille, 1810 Pycnogonids, Sea Spider, Sea Spiders | 12 21 52 | Families Genera Species | Taxom
| Symphyla Ryder, 1880 Dwarf Centipedes, Pseudocentipedes, Symphylans, Symphylids | 2 4 5 | Families Genera Species | Taxom
| Trilobita ♰ Walch, 1771 Trilobites | 34 69 33 | Families Genera Species | Taxom
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