| Acanthephyridae Dana, 1852 | | 35 | Species | Taxom |
| Acetidae Vereshchaka, 2017 | | 10 | Species | Taxom |
| Aegidae White, 1850 | | 1 | Species | Taxom |
| Aethridae Dana, 1851 | | 1 | Species | Taxom |
| Albuneidae Stimpson, 1858 | Mole crabs | 26 | Species | Taxom |
| Alpheidae Rafinesque, 1815 | Alpheid shrimp | 435 | Species | Taxom |
| Alvinocarididae Christoffersen, 1986 | | 24 | Species | Taxom |
| Amphionididae Holthuis, 1955 | | 1 | Species | Taxom |
| Arcturidae Dana, 1849 | | 31 | Species | Taxom |
| Aristeidae Wood-Mason, 1891 | Gamba prawns | 23 | Species | Taxom |
| Armadillidae Brandt, 1831 | | 2 | Species | Taxom |
| Armadillidiidae Brandt, 1833 | Doodle bugs | 1 | Species | Taxom |
| Atyidae De Haan, 1849 | Atyid shrimps | 2 | Species | Taxom |
| Atylidae Lilljeborg, 1865 | | 1 | Species | Taxom |
| Axiidae Huxley, 1879 | Lobster shrimps | 159 | Species | Taxom |
| Barbouriidae Christoffersen, 1987 | | 5 | Species | Taxom |
| Bathypalaemonellidae de Saint Lau..., 1985 | | 8 | Species | Taxom |
| Bathysquillidae Manning, 1967 | Bathysquillid mantis shrimps | 1 | Species | Taxom |
| Benthesicymidae Wood-Mason, 1891 | Benthesicymid shrimps | 35 | Species | Taxom |
| Blepharipodidae Boyko, 2002 | Spiny sand crabs | 2 | Species | Taxom |
| Bodotriidae T. Scott, 1901 | | 6 | Species | Taxom |
| Bopyridae Rafinesque, 1815 | | 5 | Species | Taxom |
| Bresiliidae Calman, 1896 | | 6 | Species | Taxom |
| Bythocarididae Christoffersen, 1987 | | 2 | Species | Taxom |
| Calappidae Milne-Edwards, 1837 | Box Crab | 4 | Species | Taxom |
| Callianassidae Dana, 1852 | Burrowing Ghost Shrimps | 156 | Species | Taxom |
| Callianideidae Kossmann, 1880 | | 12 | Species | Taxom |
| Callichiridae Manning & Fe..., 1991 | | 15 | Species | Taxom |
| Cambaridae Hobbs, 1942 | Cambarid crayfishes | 1 | Species | Taxom |
| Campylonotidae Sollaud, 1913 | | 2 | Species | Taxom |
| Cancridae Latreille, 1802 | Edible crabs | 4 | Species | Taxom |
| Caprellidae Leach, 1814 | Ghost shrimps | 1 | Species | Taxom |
| Carpiliidae Ortmann, 1893 | Coral crabs | 2 | Species | Taxom |
| Chasmocarcinidae Serène, 1964 | | 1 | Species | Taxom |
| Chirostylidae Ortmann, 1892 | | 295 | Species | Taxom |
| Chlorotocellidae Komai, Chan ..., 2019 | | 7 | Species | Taxom |
| Cirolanidae Dana, 1852 | Cave Isopods | 4 | Species | Taxom |
| Coenobitidae Dana, 1851 | Land hermit crabs | 10 | Species | Taxom |
| Coralaxiidae Sakai & de S..., 1989 | | 1 | Species | Taxom |
| Crangonidae Haworth, 1825 | Crangonid Shrimp | 158 | Species | Taxom |
| Cryptochiridae Paulson, 1875 | Coral gall crabs | 3 | Species | Taxom |
| Cryptoniscidae Kossmann, 1880 | | 1 | Species | Taxom |
| Ctenochelidae Manning & Fe..., 1991 | | 8 | Species | Taxom |
| Cyclodorippidae Ortmann, 1892 | | 1 | Species | Taxom |
| Cylisticidae Verhoeff, 1949 | | 1 | Species | Taxom |
| Cymothoidae Leach, 1818 | Fish Doctors | 2 | Species | Taxom |
| Cyproideidae J. L. Barnard, 1974 | | 1 | Species | Taxom |
| Cystisomatidae Willemöes-Suhm, 1875 | | 3 | Species | Taxom |
| Dairidae Ng & Rodriguez, 1986 | | 1 | Species | Taxom |
| Diogenidae Ortmann, 1892 | Left-handed hermit crabs | 231 | Species | Taxom |
| Disciadidae Rathbun, 1902 | | 5 | Species | Taxom |
| Enoplometopidae de Saint Lau..., 1988 | Reef lobsters | 10 | Species | Taxom |
| Epialtidae MacLeay, 1838 | Kelp Crabs | 10 | Species | Taxom |
| Eucopiidae Sars, 1885 | | 8 | Species | Taxom |
| Eugonatonotidae Chace, 1937 | | 1 | Species | Taxom |
| Eumunididae A. Milne Edw..., 1900 | | 32 | Species | Taxom |
| Euphausiidae Milne-Edwards, 1837 | | 1 | Species | Taxom |
| Galatheidae Samouelle, 1819 | Squat lobsters | 250 | Species | Taxom |
| Galenidae Alcock, 1898 | | 1 | Species | Taxom |
| Gecarcinidae MacLeay, 1838 | Land crabs | 4 | Species | Taxom |
| Geryonidae Colosi, 1923 | Deepsea crabs | 4 | Species | Taxom |
| Glypheidae Zittel, 1885 | | 2 | Species | Taxom |
| Glyphocrangonidae Smith, 1884 | Armored shrimp | 74 | Species | Taxom |
| Gnathophausiidae Udrescu, 1984 | | 7 | Species | Taxom |
| Goneplacidae MacLeay, 1838 | Angular crabs | 2 | Species | Taxom |
| Gonodactylidae Giesbrecht, 1910 | Gonodactylid mantis shrimps | 4 | Species | Taxom |
| Grapsidae MacLeay, 1838 | Marsh crabs | 10 | Species | Taxom |
| Hippidae Latreille, 1825 | Mole Crabs | 20 | Species | Taxom |
| Hippolytidae Dana, 1852 | Anemone shrimp | 59 | Species | Taxom |
| Homolidae De Haan, 1839 | Carrier crabs | 1 | Species | Taxom |
| Inachidae MacLeay, 1838 | | 3 | Species | Taxom |
| Iphimediidae Boeck, 1871 | | 1 | Species | Taxom |
| Kiwaidae Macpherson, ..., 2006 | Yeti crabs | 2 | Species | Taxom |
| Laomediidae Borradaile, 1903 | | 20 | Species | Taxom |
| Latreilliidae Stimpson, 1858 | Longleg crabs | 1 | Species | Taxom |
| Lepidomysidae Clarke, 1961 | | 7 | Species | Taxom |
| Leucosiidae Samouelle, 1819 | Nut crabs | 4 | Species | Taxom |
| Lipkiidae Burukovsky, 2012 | | 2 | Species | Taxom |
| Lithodidae Samouelle, 1819 | King crab | 28 | Species | Taxom |
| Lophogastridae Sars, 1870 | | 29 | Species | Taxom |
| Luciferidae De Haan, 1849 | | 6 | Species | Taxom |
| Lysiosquillidae Giesbrecht, 1910 | Lysiosquillid mantis shrimps | 2 | Species | Taxom |
| Lysmatidae Dana, 1852 | | 24 | Species | Taxom |
| Macrophthalmidae Dana, 1851 | | 2 | Species | Taxom |
| Majidae Samouelle, 1819 | Spider crab | 3 | Species | Taxom |
| Matutidae De Haan, 1835 | | 2 | Species | Taxom |
| Melitidae Bousfield, 1973 | | 2 | Species | Taxom |
| Menippidae Ortmann, 1893 | Stone crabs | 6 | Species | Taxom |
| Merguiidae Christoffersen, 1990 | | 1 | Species | Taxom |
| Micheleidae Sakai, 1992 | | 25 | Species | Taxom |
| Mictyridae Dana, 1851 | | 1 | Species | Taxom |
| Munididae Ahyong, Baba..., 2010 | | 654 | Species | Taxom |
| Munidopsidae Whiteaves, 1874 | | 189 | Species | Taxom |
| Mysidae Haworth, 1825 | | 64 | Species | Taxom |
| Nannastacidae Spence Bate, 1866 | | 1 | Species | Taxom |
| Nannosquillidae Manning, 1980 | Nannosquillid mantis shrimps | 2 | Species | Taxom |
| Nematocarcinidae Smith, 1884 | | 31 | Species | Taxom |
| Nephropidae Dana, 1852 | Clawed Lobster | 35 | Species | Taxom |
| Ocypodidae Rafinesque, 1815 | Fiddler crabs | 14 | Species | Taxom |
| Odontodactylidae Manning, 1980 | Odontodactylid mantis shrimps | 5 | Species | Taxom |
| Ogyrididae Holthuis, 1955 | Long-eyed shrimps | 7 | Species | Taxom |
| Oniscidae Latreille, 1802 | Sow Bugs | 1 | Species | Taxom |
| Oplophoridae Dana, 1852 | Deepsea shrimps | 14 | Species | Taxom |
| Oregoniidae Garth, 1958 | | 1 | Species | Taxom |
| Oziidae Dana, 1851 | | 1 | Species | Taxom |
| Paguridae Latreille, 1802 | Hermit Crabs | 251 | Species | Taxom |
| Palaemonidae Rafinesque, 1815 | Palaemonid Shrimps | 707 | Species | Taxom |
| Palicidae Bouvier, 1898 | Stilt crabs | 1 | Species | Taxom |
| Palinuridae Latreille, 1802 | Crawfish | 51 | Species | Taxom |
| Pandalidae Haworth, 1825 | Pandalid shrimp | 147 | Species | Taxom |
| Parapaguridae S. I. Smith, 1882 | Deepwater hermit crabs | 33 | Species | Taxom |
| Parathelphusidae Alcock, 1910 | | 1 | Species | Taxom |
| Parthenopidae MacLeay, 1838 | Elbow crabs | 3 | Species | Taxom |
| Pasiphaeidae Dana, 1852 | Glass shrimps | 67 | Species | Taxom |
| Penaeidae Rafinesque, 1815 | Penaeid shrimps | 213 | Species | Taxom |
| Petalidiumidae Vereshchaka, 2017 | | 3 | Species | Taxom |
| Philosciidae Kinahan, 1857 | Woodlice | 1 | Species | Taxom |
| Pilumnidae Samouelle, 1819 | | 5 | Species | Taxom |
| Pilumnoididae Guinot & Mac..., 1987 | | 1 | Species | Taxom |
| Plagusiidae Dana, 1851 | | 6 | Species | Taxom |
| Plakarthriidae Hansen, 1905 | | 1 | Species | Taxom |
| Platyarthridae Verhoeff, 1949 | Woodlice | 1 | Species | Taxom |
| Polychelidae Wood-Mason, 1874 | Blind lobsters | 21 | Species | Taxom |
| Porcellanidae Haworth, 1825 | Porcelain crab | 97 | Species | Taxom |
| Porcellionidae Brandt & Rat..., 1831 | Woodlice | 3 | Species | Taxom |
| Portunidae Rafinesque, 1815 | Swimming Crab | 26 | Species | Taxom |
| Priscomilitaridae Hirayama, 1988 | | 3 | Species | Taxom |
| Procarididae Chace & Manning, 1972 | | 4 | Species | Taxom |
| Processidae Ortmann, 1896 | Night shrimps | 35 | Species | Taxom |
| Protosquillidae Manning, 1980 | Protosquillid mantis shrimps | 2 | Species | Taxom |
| Psalidopodidae Wood-Mason, 1892 | Scissorfoot shrimps | 2 | Species | Taxom |
| Pseudochelidae De Grave & M..., 2004 | | 2 | Species | Taxom |
| Pseudosquillidae Manning, 1977 | Pseudosquillid mantis shrimps | 3 | Species | Taxom |
| Pylochelidae Bate, 1888 | | 14 | Species | Taxom |
| Raninidae De Haan, 1839 | Frog crabs | 3 | Species | Taxom |
| Rhynchocinetidae Ortmann, 1890 | Hingebeak shrimp | 23 | Species | Taxom |
| Scyllaridae Latreille, 1825 | Shovel-nosed lobsters | 93 | Species | Taxom |
| Sergestidae Dana, 1852 | | 67 | Species | Taxom |
| Sesarmidae Dana, 1851 | | 3 | Species | Taxom |
| Sicyonellidae Vereshchaka, 2017 | | 5 | Species | Taxom |
| Sicyoniidae Ortmann, 1898 | Rock shrimps | 35 | Species | Taxom |
| Solenoceridae Wood-Mason, 1891 | Solenocerid shrimps | 63 | Species | Taxom |
| Spongicolidae von Martens, 1872 | Glass sponge shrimps | 33 | Species | Taxom |
| Squillidae Latreille, 1802 | Squillid mantis shrimps | 5 | Species | Taxom |
| Stenopodidae Risso, 1826 | Coral shrimps | 24 | Species | Taxom |
| Sternostylidae Baba Ahyong ..., 2018 | | 6 | Species | Taxom |
| Strahlaxiidae Poore, 1994 | | 7 | Species | Taxom |
| Stygiomysidae Caroli, 1937 | | 5 | Species | Taxom |
| Stylodactylidae Bate, 1888 | | 31 | Species | Taxom |
| Tetraliidae Castro, Ng &..., 2004 | | 3 | Species | Taxom |
| Tetrasquillidae Manning & Camp, 1993 | Tetrasquillid mantis shrimps | 1 | Species | Taxom |
| Thalassinidae Latreille, 1831 | Mud lobsters | 11 | Species | Taxom |
| Thoridae Kingsley, 1878 | Anemone shrimp | 113 | Species | Taxom |
| Trachelipodidae Strouhal, 1953 | | 1 | Species | Taxom |
| Trapeziidae Miers, 1886 | Coral crabs | 9 | Species | Taxom |
| Trichoniscidae G. O. Sars, 1899 | Woodlice | 4 | Species | Taxom |
| Upogebiidae Borradaile, 1903 | Mud shrimp | 137 | Species | Taxom |
| Varunidae H. Milne-Edw..., 1853 | | 1 | Species | Taxom |
| Xanthidae MacLeay, 1838 | Mud crabs | 32 | Species | Taxom |