Arthropods from region Chagos Archipelago (Indian Ocean islands) Arachnida Lamarck, 1801 Arachnids | 9 12 14 | Families Genera Species | Taxom
| Insecta Linnaeus, 1758 Insects, True insects | 67 231 416 | Families Genera Species | Taxom
| Malacostraca Latreille, 1802 Higher Crustaceans, Malacostracans | 56 138 231 | Families Genera Species | Taxom
| Maxillopoda Dahl, 1956 Maxillopods | 27 54 108 | Families Genera Species | Taxom
| Pycnogonida Latreille, 1810 Pycnogonids, Sea Spider, Sea Spiders | 1 2 2 | Families Genera Species | Taxom
| Thylacocephala ♰ Pinna & al., 1982 Bivalve arthropods | 0 1 0 | Families Genera Species | Taxom
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