The Royal Belgian Institute of Natural Sciences Crustacea collection contains 56511 digitised specimens of 5791 taxa. The following classes are included: Arachnida, Aves, Branchiopoda Latreille, 1817, Clitellata, Gastropoda Cuvier, 1797, Hydrozoa Owen, 1843, Ichthyostraca Zrzavy et al., 1997, Insecta Linnaeus, 1758, Malacostraca Latreille, 1802, Maxillopoda Dahl, 1956, Merostomata, Ostracoda indet., Ostracoda Latreille, 1802, Polychaeta, Pycnogonida Latreille, 1810, Reptilia Laurenti, 1768, Secernentea, Sipunculidea, Turbellaria