Phylum Arthropoda Siebold, 1848 - arthropods Count: - 1 Class Crustacea Brünnich, 1772 - crustaceans see Superclass Crustacea Pennant, 1777 Count: - 2 Class Arachnida Lamarck, 1801 Count: - 3 Class Myriapoda Latreille, 1802 see Subphylum Myriapoda Latreille, 1802 Count: - 4 Class Insecta Linnaeus, 1758 - insects Count: -