Between brackets is the number of accepted extant species
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- Decapoda (17 683)
- Suborder Decapoda incertae sedis †
- Suborder Dendrobranchiata (533)
- Suborder Euzygida accepted as Stenopodidea
- Suborder Heterochelida
- Suborder Macrura
- Suborder Macrura reptantia
- Suborder Natantia
- Suborder Pleocyemata (17 150)
- Infraorder Achelata (153)
- Infraorder Anomura (3 414)
- Infraorder Astacidea (783)
- Infraorder Axiidea (600)
- Infraorder Brachyura (7 883)
- Infraorder Callianassidea accepted as Axiidea
- Infraorder Caridea (3 919)
- Section Amphionidea accepted as Caridea
- Section Penaeidea accepted as Dendrobranchiata
- Superfamily Alpheoidea Rafinesque, 1815 (1 229)
- Superfamily Atyoidea De Haan, 1849 (560)
- Superfamily Bresilioidea Calman, 1896 (70)
- Superfamily Campylonotoidea Sollaud, 1913 (17)
- Superfamily Caridea incertae sedis †
- Superfamily Crangonoidea Haworth, 1825 (329)
- Superfamily Nematocarcinoidea Smith, 1884 (80)
- Superfamily Oplophoroidea Dana, 1852 (71)
- Superfamily Palaemonoidea Rafinesque, 1815 (1 149)
- Family Anchistioididae Borradaile, 1915 accepted as Palaemonidae Rafinesque, 1815
- Family Desmocarididae Borradaile, 1915 (2)
- Family Euryrhynchidae Holthuis, 1950 (11)
- Family Gnathophyllidae Dana, 1852 accepted as Palaemonidae Rafinesque, 1815
- Family Hymenoceridae Ortmann, 1890 accepted as Palaemonidae Rafinesque, 1815
- Family Kakaducarididae Bruce, 1993 accepted as Palaemonidae Rafinesque, 1815
- Family Palaemonidae Rafinesque, 1815 (1 132)
- Genus Actinimenes Ďuriš & Horká, 2017 (4)
- Genus Alaocaris Holthuis, 1949 accepted as Palaemonetes Heller, 1869
- Genus Alburnia Bravi & Garassino, 1998 †
- Genus Alciope Rafinesque, 1814 accepted as Pontonia Latreille, 1829
- Genus Allobrachium Jayachandran, 2001 accepted as Macrobrachium Spence Bate, 1868
- Genus Allocaris Sollaud, 1911 accepted as Palaemonetes Heller, 1869
- Genus Allopontonia Bruce, 1972 (2)
- Genus Altopontonia Bruce, 1990 (1)
- Genus Amphipalaemon Nobili, 1901 accepted as Anchistioides Paulson, 1875
- Genus Amphipontonia Bruce, 1991 (2)
- Genus Anapontonia Bruce, 1966 (1)
- Genus Anchiopontonia Bruce, 1992 (1)
- Genus Anchista Dana, 1852 accepted as Anchistia Dana, 1852
- Genus Anchistia Dana, 1852 accepted as Periclimenes O.G. Costa, 1844
- Genus Anchistioides Paulson, 1875 (3)
- Genus Anchistus Borradaile, 1898 (4)
- Genus Ancylocaris Schenkel, 1902 (1)
- Genus Ancylomenes Okuno & Bruce, 2010 (22)
- Genus Anisomenaeus Bruce, 2010 (1)
- Genus Apopontonia Bruce, 1976 (1)
- Genus Arachnochium Wowor & Ng, 2010 (2)
- Genus Araiopontonia Fujino & Miyake, 1970 (1)
- Genus Ascidonia Fransen, 2002 (5)
- Genus Bahiacaris Schweitzer, Santana, Pinheiro & Feldmann, 2019 †
- Genus Bahiacaris Schweitzer, Santana, Pinheiro & Feldmann, 2023 accepted as Bahiacaris Schweitzer, Santana, Pinheiro & Feldmann, 2019 †
- Genus Balssia Kemp, 1922 (3)
- Genus Bathymenes Kou, Li & Bruce, 2015 (20)
- Genus Bechleja Houša, 1957 †
- Genus Beurlenia Martins-Neto & Mezzalira, 1991 †
- Genus Bithynis Philippi, 1860 accepted as Cryphiops Dana, 1852
- Genus Bithynops Holthuis, 1973 accepted as Cryphiops (Bithynops) Holthuis, 1973
- Genus Blepharocaris Mitsuhashi & Chan, 2007 (1)
- Genus Brachycarpus Spence Bate, 1888 (3)
- Species Brachycarpus advena Nobili, 1906 accepted as Brachycarpus biunguiculatus (Lucas, 1846)
- Species Brachycarpus antonini Magri, 1926 accepted as Balssia gasti (Balss, 1921)
- Species Brachycarpus audouini Spence Bate, 1888 accepted as Periclimenes yaldwyni Holthuis, 1959
- Species Brachycarpus biunguiculatus (Lucas, 1846)
- Species Brachycarpus crosnieri Bruce, 1998
- Species Brachycarpus dentatus Nobili, 1907
- Species Brachycarpus holthuisi Fausto Filho, 1966
- Species Brachycarpus neapolitanus Cano, 1890 accepted as Brachycarpus biunguiculatus (Lucas, 1846)
- Species Brachycarpus savignyi Spence Bate, 1888 accepted as Brachycarpus biunguiculatus (Lucas, 1846)
- Genus Brucecaris Marin & Chan, 2006 (1)
- Genus Bruceclimenes Anker in Anker, Vimercati, Barreca, Marchese, Chimienti, Terraneo, Rodrigue, Eweida, Qurban, Duarte, Pieribone & Benzoni, 2023 (1)
- Genus Bruceonia Fransen, 2002 (1)
- Genus Cainonia Bruce, 2005 (1)
- Genus Calathaemon Bruce & Short, 1993 (1)
- Genus Calmania Nobili, 1907 accepted as Brachycarpus Spence Bate, 1888
- Genus Carinopontonia Bruce, 1988 (1)
- Genus Cavicheles Holthuis, 1952 accepted as Jocaste Holthuis, 1952
- Genus Chacella Bruce, 1986 (1)
- Genus Chernocaris Johnson, 1967 accepted as Conchodytes Peters, 1852
- Genus Climeniperaeus Bruce, 1995 (3)
- Genus Colemonia Bruce, 2005 (1)
- Genus Conchodytes Peters, 1852 (11)
- Genus Coralliocaris Stimpson, 1860 (11)
- Genus Corniger Borradaile, 1915 accepted as Laomenes Clark, 1919
- Genus Coutierea Nobili, 1901 (1)
- Genus Coutierella Sollaud, 1914 accepted as Palaemon Weber, 1795
- Genus Creaseria Holthuis, 1950 (1)
- Genus Crinotonia Marin, 2006 (2)
- Genus Cristiger Borradaile, 1915 accepted as Periclimenes O.G. Costa, 1844
- Genus Cristimenes Ďuriš & Horká, 2017 (4)
- Genus Cryphiops Dana, 1852 accepted as Macrobrachium Spence Bate, 1868
- Genus Cryptoleander Gurney & Lebour, 1941 accepted as Leander Desmarest, 1849
- Genus Ctenopontonia Bruce, 1979 (1)
- Genus Cuapetes Clark, 1919 (30)
- Genus Dactylonia Fransen, 2002 (8)
- Genus Dasella Lebour, 1945 (3)
- Genus Dasia Lebour, 1938 accepted as Dasella Lebour, 1945
- Genus Dasycaris Kemp, 1922 (4)
- Genus Dasygius Kemp, 1922 accepted as Dasycaris Kemp, 1922
- Genus Dennisia Norman, 1861 accepted as Periclimenes O.G. Costa, 1844
- Genus Diapontonia Bruce, 1986 (1)
- Genus Drimo Risso, 1827 accepted as Gnathophyllum Latreille, 1819
- Genus Echinopericlimenes Marin & Chan, 2014 (4)
- Genus Ensiger Borradaile, 1915 (2)
- Genus Epipontonia Bruce, 1977 (4)
- Genus Eupalaemon Ortmann, 1891 accepted as Macrobrachium Spence Bate, 1868
- Genus Eupontonia Bruce, 1971 accepted as Palaemonella Dana, 1852
- Genus Exoclimenella Bruce, 1995 (4)
- Genus Exoclimenella Ďuriš & Bruce, 1995 accepted as Exoclimenella Bruce, 1995
- Genus Exopalaemon Holthuis, 1950 accepted as Palaemon Weber, 1795
- Genus Exopontonia Bruce, 1988 (1)
- Genus Falciger Borradaile, 1915 accepted as Cuapetes Clark, 1919
- Genus Fennera Holthuis, 1951 (2)
- Genus Gnathophylleptum d'Udekem d'Acoz, 2001 (1)
- Genus Gnathophylloides Schmitt, 1933 (2)
- Genus Gnathophyllum Latreille, 1819 (10)
- Genus Hamiger Borradaile, 1916 (1)
- Genus Hamodactyloides Fujino, 1973 (1)
- Genus Hamodactylus Holthuis, 1952 (6)
- Genus Hamopontonia Bruce, 1970 (5)
- Genus Harpiliopsis Borradaile, 1917 (3)
- Genus Harpilius Dana, 1852 (4)
- Genus Holthuisaeus Anker & De Grave, 2010 (1)
- Genus Homelys von Meyer, 1844 † accepted as Homelys von Meyer, 1862 †
- Genus Hymenocera Latreille, 1819 (1)
- Genus Ischnopontonia Bruce, 1966 (1)
- Genus Isopericlimenaeus Marin, 2012 accepted as Periclimenaeus Borradaile, 1915
- Genus Isopontonia Bruce, 1982 (1)
- Genus Izucaris Okuno, 1999 (2)
- Genus Jocaste Holthuis, 1952 (3)
- Genus Kakaducaris Bruce, 1993 accepted as Leptopalaemon Bruce & Short, 1993
- Genus Kaviengella Šobáňová & Ďuriš, 2018 (1)
- Genus Kellnerius Santana, Pinheiro, Da Silva & Saraiva, 2013 †
- Genus Kemponia Bruce, 2004 accepted as Cuapetes Clark, 1919
- Genus Koumacella Ďuriš & Fišarová, 2024 (1)
- Genus Lacertopontonia Marin, 2011 accepted as Conchodytes Peters, 1852
- Genus Laomenes Clark, 1919 (12)
- Genus Leander Desmarest, 1849 (5)
- Genus Leandrites Holthuis, 1950 (4)
- Genus Leptocarpus Holthuis, 1950 (3)
- Genus Leptomenaeus Bruce, 2007 (2)
- Genus Leptomenes Bruce, 2006 accepted as Leptomenaeus Bruce, 2007
- Genus Leptopalaemon Bruce & Short, 1993 (5)
- Genus Levicaris Bruce, 1973 (1)
- Genus Lipkebe Chace, 1969 (1)
- Genus Lipkemenes Bruce & Okuno, 2010 (1)
- Genus Macrobrachium Spence Bate, 1868 (280)
- Genus Macroterocheir Stebbing, 1908 accepted as Macrobrachium Spence Bate, 1868
- Genus Madangella Frolová & Ďuriš, 2018 (2)
- Genus Manipontonia Bruce, Okuno & Li, 2005 (3)
- Genus Margitonia Bruce, 2007 (1)
- Genus Marygrande Pesta, 1911 accepted as Anchistus Borradaile, 1898
- Genus Mesocaris Ortmann, 1893
- Genus Mesopontonia Bruce, 1967 (7)
- Genus Metacrimenes Komai & Sakiyama, 2023 (1)
- Genus Metapontonia Bruce, 1967 (2)
- Genus Michaelimenes Okuno, 2017 (5)
- Genus Micropsalis von Meyer, 1859 †
- Genus Miopontonia Bruce, 1985 (1)
- Genus Nematopalaemon Holthuis, 1950 (5)
- Genus Nematophyllum Bleeker, 1856 accepted as Hymenocera Latreille, 1819
- Genus Neoanchistus Bruce, 1975 (2)
- Genus Neoclimenes Mitsuhashi, Li & Chan, 2010 (1)
- Genus Neopalaemon Hobbs, 1973 (1)
- Genus Neopericlimenes Heard, Spotte & Bubucis, 1993 (1)
- Genus Neopontonides Holthuis, 1951 (5)
- Genus Ngankeecaris Okuno & Yoshida, 2024 (2)
- Genus Nippontonia Bruce & Bauer, 1997 (3)
- Genus Notopontonia Bruce, 1991 (1)
- Genus Odontocerus Leach, 1830 accepted as Odontorhynchus Leach, 1830
- Genus Odontolophus Spence Bate, 1888
- Genus Odontonia Fransen, 2002 (9)
- Genus Odontorhynchus Leach, 1830
- Genus Oedipus Dana, 1852 accepted as Coralliocaris Stimpson, 1860
- Genus Onycocaridella Bruce, 1981 (6)
- Genus Onycocaridites Bruce, 1987 (1)
- Genus Onycocaris Nobili, 1904 (24)
- Genus Onycomenes Bruce, 2009 (1)
- Genus Opaepupu Anker & De Grave, 2021 (1)
- Genus Orthopontonia Bruce, 1982 (1)
- Genus Palaeander Holthuis, 1950 accepted as Palaemon Weber, 1795
- Genus Palaemon Weber, 1795 (90)
- Genus Palaemon Fabricius, 1798 accepted as Palaemon Weber, 1795
- Genus Palaemonella Dana, 1852 (38)
- Genus Palaemonetes Heller, 1869 accepted as Palaemon Weber, 1795
- Genus Palaemonopsis Borradaile, 1900 accepted as Anchistioides Paulson, 1875
- Genus Palaemonopsis Stimpson, 1871 accepted as Palaemonetes Heller, 1869
- Genus Palemon Weber, 1795 accepted as Palaemon Weber, 1795
- Genus Paraclimenaeus Bruce, 1988 (5)
- Genus Paraclimenes Bruce, 1995 (3)
- Genus Paranchistus Holthuis, 1952 (1)
- Genus Parapalaemon Ortmann, 1891 accepted as Macrobrachium Spence Bate, 1868
- Genus Parapalaemonetes Brandt & Schulz, 2013 †
- Genus Parapontonia Bruce, 1968 accepted as Laomenes Clark, 1919
- Genus Paratypton Balss, 1914 (1)
- Genus Patonia Mitsuhashi & Chan, 2006 (1)
- Genus Pelias Roux, 1831 accepted as Periclimenes O.G. Costa, 1844
- Genus Periclimenaeus Borradaile, 1915 (88)
- Genus Periclimenella Bruce, 1995 (3)
- Genus Periclimenella Ďuriš & Bruce, 1995 accepted as Periclimenella Bruce, 1995
- Genus Periclimenes O.G. Costa, 1844 (112)
- Genus Periclimenoides Bruce, 1990 (3)
- Genus Philarius Holthuis, 1952 (10)
- Genus Phycomenes Bruce, 2008 (5)
- Genus Phyllognathia Borradaile, 1915 (2)
- Genus Pinnotherotonia Marin & Paulay, 2010 (1)
- Genus Platycaris Holthuis, 1952 (1)
- Genus Platypontonia Bruce, 1968 (3)
- Genus Plesiomenaeus Bruce, 2009 (1)
- Genus Plesiopontonia Bruce, 1985 (1)
- Genus Pliopontonia Bruce, 1973 (2)
- Genus Polkamenes De Gier & Fransen, 2023 (4)
- Genus Pontonella Heller, 1856 accepted as Typton O.G. Costa, 1844
- Genus Pontonia Latreille, 1829 (11)
- Genus Pontonides Borradaile, 1917 (7)
- Genus Pontoniopsides Bruce, 2005 (1)
- Genus Pontoniopsis Borradaile, 1915 (1)
- Genus Poripontonia Fransen, 2003 (2)
- Genus Propalaemon Woodward, 1903 †
- Genus Propontonia Bruce, 1969 (2)
- Genus Pseudocaridinella Martins-Neto & Mezzalira, 1991 †
- Genus Pseudoclimenes Bruce, 2008 (1)
- Genus Pseudocoutierea Holthuis, 1951 (8)
- Genus Pseudopalaemon Sollaud, 1911 (7)
- Genus Pseudopontonia Bruce, 1992 (1)
- Genus Pseudopontonides Heard, 1986 (2)
- Genus Pseudoveleronia Marin, 2008 (1)
- Genus Pycnocaris Bruce, 1972 (1)
- Genus Rapimenes Ďuriš & Horká, 2017 (3)
- Genus Rapipontonia Marin, 2007 (4)
- Genus Retrocaris Ortmann, 1893 accepted as Brachycarpus Spence Bate, 1888
- Genus Rhopalaemon Ashelby & De Grave, 2010 (1)
- Genus Rostronia Fransen, 2002 (1)
- Genus Rubiyana Anker in Anker, Vimercati, Barreca, Marchese, Chimienti, Terraneo, Rodrigue, Eweida, Qurban, Duarte, Pieribone & Benzoni, 2023 (1)
- Genus Sandimenes Li, 2009 (2)
- Genus Sandyella Marin, 2009 (1)
- Genus Schmelingia Schweigert, 2002 †
- Genus Stegopontonia Nobili, 1906 (1)
- Genus Tectopontonia Bruce, 1973 (1)
- Genus Tenuipedium Wowor & Ng, 2010 (1)
- Genus Thaumastocaris Kemp, 1922 (1)
- Genus Tridacnocaris Nobili, 1899 accepted as Anchistus Borradaile, 1898
- Genus Troglindicus Sankolli & Shenoy, 1979 (1)
- Genus Troglocubanus Holthuis, 1949 (5)
- Genus Troglomexicanus Villalobos, Alvarez & Iliffe, 1999 (3)
- Genus Tuleariocaris Hipeau-Jacquotte, 1965 (4)
- Genus Tympanicheles De Gier & Fransen, 2023 (2)
- Genus Typton O.G. Costa, 1844 (22)
- Genus Typtonoides Bruce, 2010 (1)
- Genus Typtonomenaeus Marin & Chan, 2013 (1)
- Genus Typtonychus Bruce, 1996 (6)
- Genus Unesconia Anker, 2020 (1)
- Genus Unguicaris Marin & Chan, 2006 (4)
- Genus Urocaridella Borradaile, 1915 (8)
- Genus Urocaris Stimpson, 1860 (1)
- Genus Veleronia Holthuis, 1951 (2)
- Genus Veleroniopsis Gore, 1981 (1)
- Genus Vir Holthuis, 1952 accepted as Palaemonella Dana, 1852
- Genus Waldola Holthuis, 1951 (1)
- Genus Yemenicaris Bruce, 1997 (1)
- Genus Yongjiacaris Garassino, Yanbin, Schram & Taylor, 2002 †
- Genus Zenopontonia Bruce, 1975 (3)
- Genus Zoukaris Anker & Corbari, 2020 (1)
- Family Typhlocarididae Annandale & Kemp, 1913 (4)
- Subfamily Palaemoninae Rafinesque, 1815 accepted as Palaemonidae Rafinesque, 1815
- Subfamily Pontoniinae Kingsley, 1879 accepted as Palaemonidae Rafinesque, 1815
- Superfamily Pandaloidea Haworth, 1825 (203)
- Superfamily Pasiphaeoidea Dana, 1852 (104)
- Superfamily Physetocaridoidea Chace, 1940 accepted as Pandaloidea Haworth, 1825
- Superfamily Pleopteryxoidea Schweigert & Garassino, 2006 †
- Superfamily Processoidea Ortmann, 1896 (70)
- Superfamily Psalidopodoidea Wood-Mason (3)
- Superfamily Stylodactyloidea Spence Bate, 1888 (34)
- Family Hectarthropidae Spence Bate, 1888 accepted as Processidae Ortmann, 1896
- Family Prionorhynchus Leach, 1830
- Genus Caricyphus Spence Bate, 1888
- Genus Rhomaleocaris Spence Bate, 1888
- Infraorder Gebiidea (252)
- Infraorder Glypheidea (2)
- Infraorder Palaeopalaeomonida †
- Infraorder Polychelida (38)
- Infraorder Procarididea (6)
- Infraorder Stenopodidea (100)
- Suborder Reptantia
- Suborder Trichelida