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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)
- Section Callichimaeroida †
- Section Cyclodorippoida (110)
- Section Dakoticancroida †
- Section Dromiacea (189)
- Section Etyoida †
- Section Eubrachyura (7 446)
- Subsection Heterotremata (6 086)
- Superfamily Aethroidea Dana, 1851 (37)
- Superfamily Bellioidea Dana, 1852 (7)
- Superfamily Bythograeoidea Williams, 1980 (16)
- Superfamily Calappoidea De Haan, 1833 (103)
- Superfamily Cancroidea Latreille, 1802 (37)
- Superfamily Carpilioidea Ortmann, 1893 (3)
- Superfamily Cheiragonoidea Ortmann, 1893 (3)
- Superfamily Componocancroidea Feldmann, Schweitzer & Green, 2008 †
- Superfamily Corystoidea Samouelle, 1819 (9)
- Superfamily Dairoidea Serène, 1965 (4)
- Superfamily Dorippoidea MacLeay, 1838 (100)
- Superfamily Eriphioidea MacLeay, 1838 (67)
- Superfamily Gecarcinucoidea Rathbun, 1904 (458)
- Superfamily Goneplacoidea MacLeay, 1838 (238)
- Superfamily Heterotremata incertae sedis †
- Superfamily Hexapodoidea Miers, 1886 (44)
- Superfamily Hymenosomatoidea MacLeay, 1838 (138)
- Superfamily Leucosioidea Samouelle, 1819 (516)
- Superfamily Majoidea Samouelle, 1819 (968)
- Superfamily Montezumelloidea Ossó & Domínguez, 2021 †
- Superfamily Orithyioidea Dana, 1852 (1)
- Superfamily Palicoidea Bouvier, 1898 (69)
- Superfamily Parthenopoidea MacLeay, 1838 (148)
- Superfamily Pilumnoidea Samouelle, 1819 (440)
- Superfamily Portunoidea Rafinesque, 1815 (476)
- Family Archaeoportunidae Artal, Ossó & Domínguez, 2021 † accepted as Portuninae Rafinesque, 1815
- Family Archaeoportunidae Artal, Ossó & Domínguez, 2013 † accepted as Archaeoportunidae Artal, Ossó & Domínguez, 2021 †
- Family Brusiniidae Števčić, 1991 (4)
- Family Carcineretidae Beurlen, 1930 †
- Family Carcinidae MacLeay, 1838 (7)
- Family Eogeryonidae Ossó, 2021 †
- Family Gatuniidae Rathbun, 1918 accepted as Necronectinae Glaessner, 1928
- Family Geryonidae Colosi, 1924 (50)
- Family Litophylacidae Van Straelen, 1936 †
- Family Longusorbiidae Karasawa, Schweitzer & Feldmann, 2008 †
- Family Macropipidae Stephenson & Campbell, 1960 accepted as Polybiidae Paulson, 1875
- Family Megalopidae Haworth, 1825 accepted as Carcininae MacLeay, 1838
- Family Nautilocorystidae Ortmann, 1893 (2)
- Family Ovalipidae Spiridonov, Neretina & Schepetov, 2014 (11)
- Family Pirimelidae Alcock, 1899 (5)
- Family Platyonichidae Dana, 1851 accepted as Platyonichinae Dana, 1851
- Family Platyonichidae Ortmann, 1893 accepted as Platyonichinae Dana, 1851
- Family Platyonychidae Dana, 1851 accepted as Platyonichidae Dana, 1851
- Family Podophthalmidae Dana, 1851 accepted as Podophthalminae Dana, 1851
- Family Polybiidae Paulson, 1875 (31)
- Family Portunidae Rafinesque, 1815 (363)
- Subfamily Achelouinae Spiridonov, 2020 (28)
- Subfamily Arenaeinae Dana, 1851 accepted as Portuninae Rafinesque, 1815
- Subfamily Caphyrinae Paulson, 1875 accepted as Thalamitinae Paulson, 1875
- Subfamily Carupinae Paulson, 1875 (26)
- Subfamily Catoptrinae Borradaile, 1903 accepted as Carupinae Paulson, 1875
- Subfamily Coelocarcininae Števćić, 1991 (2)
- Subfamily Goniocaphyrinae Borradaile, 1900 accepted as Carupinae Paulson, 1875
- Subfamily Lupinae Dana, 1851 accepted as Portuninae Rafinesque, 1815
- Subfamily Lupocyclinae Alcock, 1899 (15)
- Subfamily Necronectinae Glaessner, 1928 (4)
- Subfamily Podophthalminae Dana, 1851 (6)
- Subfamily Polybiinae Paulson, 1875 accepted as Polybiidae Paulson, 1875
- Subfamily Portuninae Rafinesque, 1815 (92)
- Tribe Atoportunini Števčić, 2005 accepted as Portuninae Rafinesque, 1815
- Genus Acanthoportunus Schweitzer & Feldmann, 2002 †
- Genus Acheloüs De Haan, 1833 accepted as Achelous De Haan, 1833
- Genus Alionectes Koch, Spiridonov & Ďuriš, 2022 (2)
- Genus Allomonomia Koch, Spiridonov & Ďuriš, 2022 (2)
- Genus Archaeoportunus Artal, Ossó & Domínguez, 2021 †
- Genus Arenaeus Dana, 1851 (2)
- Genus Atoportunus Ng & Takeda, 2003 (3)
- Genus Callinectes Stimpson, 1860 (15)
- Genus Carupella Lenz in Lenz & Strunck, 1914 (3)
- Genus Cavoportunus Nguyen & Ng, 2010 (1)
- Genus Colneptunus Lőrenthey in Lőrenthey & Beurlen, 1929 †
- Genus Cycloachelous Ward, 1942 (9)
- Genus Eodemus Koch, Spiridonov & Ďuriš, 2022 (6)
- Genus Euctenota Gerstaecker, 1856 accepted as Arenaeus Dana, 1851
- Genus Gonioneptunites Vía Boada, 1959 † accepted as Colneptunus Lőrenthey in Lőrenthey & Beurlen, 1929 †
- Genus Incultus Koch, Spiridonov & Ďuriš, 2022 (3)
- Genus Lupea Leach, 1814 accepted as Lupa Leach, 1814
- Genus Monomia Gistel, 1848 (10)
- Genus Neptunus De Haan, 1833 accepted as Portunus Weber, 1795
- Genus Persianus Garassino, Pasini, Mirzaie Ataabadi & Nyborg in Garassino, Pasini, Mirzaie Ataabadi, Hadi, Parsazad, Nyborg & Vega, 2024 †
- Genus Portunus Weber, 1795 (14)
- Subgenus Portunus (Achelous) De Haan, 1833 accepted as Achelous De Haan, 1833
- Subgenus Portunus (Amphitrite) De Haan, 1833 accepted as Amphitrite De Haan, 1833
- Subgenus Portunus (Charybdis) De Haan, 1833 accepted as Charybdis (Charybdis) De Haan, 1833
- Subgenus Portunus (Cycloachelous) Ward, 1942 accepted as Cycloachelous Ward, 1942
- Subgenus Portunus (Hellenus) A. Milne-Edwards, 1879 accepted as Achelous De Haan, 1833
- Subgenus Portunus (Lupocycloporus) Alcock, 1899 accepted as Lupocycloporus Alcock, 1899
- Subgenus Portunus (Monomia) Gistel, 1848 accepted as Monomia Gistel, 1848
- Subgenus Portunus (Oceanus) De Haan, 1833 accepted as Charybdis (Charybdis) De Haan, 1833
- Subgenus Portunus (Portunus) Weber, 1795 accepted as Portunus Weber, 1795
- Subgenus Portunus (Posidon) Herklots, 1851 accepted as Sanquerus Manning, 1989
- Species Portunus (Posidon) validus Herklots, 1851 accepted as Sanquerus validus (Herklots, 1851)
- Subgenus Portunus (Thalamita) Latreille, 1829 accepted as Thalamita Latreille, 1829
- Subgenus Portunus (Xiphonectes) A. Milne-Edwards, 1873 accepted as Xiphonectes A. Milne-Edwards, 1873
- Species Portunus acerbiterminalis Stephenson & Rees, 1967 accepted as Eodemus arabicus (Nobili, 1905)
- Species Portunus acuminatus (Stimpson, 1871) accepted as Achelous acuminatus Stimpson, 1871
- Species Portunus affinis Weber, 1795
- Species Portunus affinis (Faxon, 1893) accepted as Achelous affinis Faxon, 1893
- Species Portunus alphonsei Karasawa, Schweitzer & Feldmann, 2008 †
- Species Portunus anceps (de Saussure, 1857) accepted as Achelous anceps (de Saussure, 1857)
- Species Portunus annulatus Fabricius, 1798 accepted as Charybdis (Charybdis) annulata (Fabricius, 1798)
- Species Portunus annulatus Weber, 1795
- Species Portunus antarcticus Hombron & Jacquinot, 1846 accepted as Nectocarcinus antarcticus (Hombron & Jacquinot, 1846)
- Species Portunus arcuatus Leach, 1814 accepted as Polybius navigator (Herbst, 1794)
- Species Portunus arcuatus (A. Milne-Edwards, 1860) †
- Species Portunus armatus (A. Milne-Edwards, 1861)
- Species Portunus asper (A. Milne-Edwards, 1861) accepted as Achelous asper (A. Milne-Edwards, 1861)
- Species Portunus atecuicitli Vega, Feldmann, Villalobos-Hiriart & Gío-Argíez, 1999 †
- Species Portunus atropatanus Aslanova & Dzhafarova, 1975 † accepted as Liocarcinus oligocenicus (Paucă, 1929) †
- Species Portunus aurimanus Gundlach & Torralbas, 1900 accepted as Achelous ordwayi Stimpson, 1860
- Species Portunus australiensis Stephenson & Cook, 1973 accepted as Portunus (Monomia) australiensis Stephenson & Cook, 1973
- Species Portunus barbarus Lucas, 1846 accepted as Polybius vernalis (Risso, 1827)
- Species Portunus bericensis De Angeli & Bellin, 2024 †
- Species Portunus biguttatus Risso, 1816 accepted as Xaiva biguttata (Risso, 1816)
- Species Portunus binoculus Holthuis, 1969 accepted as Achelous binoculus (Holthuis, 1969)
- Species Portunus bolivari Zariquiey Álvarez, 1948 accepted as Polybius bolivari (Zariquey Álvarez, 1948)
- Species Portunus borradailei Bennett, 1930 accepted as Polybius corrugatus (Pennant, 1777)
- Species Portunus brocki (De Man, 1888) accepted as Portunus (Xiphonectes) brockii (De Man, 1888)
- Species Portunus brouweri Van Straelen, 1924 †
- Species Portunus carcinoides Kinahan, 1857 accepted as Carcinus maenas (Linnaeus, 1758)
- Species Portunus catalaunicus (Vía, 1941) †
- Species Portunus catharus White in White & Doubleday, 1843 accepted as Ovalipes catharus (White in White & Doubleday, 1843)
- Species Portunus chaptalii Audouin, 1826 accepted as Thalamita chaptalii (Audouin, 1826)
- Species Portunus convexus De Haan, 1835
- Species Portunus corrugatus (Pennant, 1777) accepted as Polybius corrugatus (Pennant, 1777)
- Species Portunus cribrarius Lamarck, 1818 accepted as Arenaeus cribrarius (Lamarck, 1818)
- Species Portunus crucifer Fabricius, 1798 accepted as Charybdis (Charybdis) feriata (Linnaeus, 1758)
- Species Portunus curvipenis Stephenson, 1961 accepted as Portunus (Monomia) curvipenis Stephenson, 1961
- Species Portunus Dalyellii Spence Bate, 1851 accepted as Bathynectes longipes (Risso, 1816)
- Species Portunus dayawanensis Chen, 1986 accepted as Eodemus unidens (Laurie, 1906)
- Species Portunus delgadoi (Fontannes, 1884) †
- Species Portunus denticulatus Marion de Procé, 1822 accepted as Portunus pelagicus (Linnaeus, 1758)
- Species Portunus depurator (Linnaeus, 1758) accepted as Polybius depurator (Linnaeus, 1758)
- Species Portunus diacantha Latreille, 1825 accepted as Callinectes diacanthus (Latreille, 1825)
- Species Portunus dubius Rathke, 1836 accepted as Polybius vernalis (Risso, 1827)
- Species Portunus Dufourii Desmarest, 1825 accepted as Lupa Dufourii Desmarest, 1825
- Species Portunus edwardsi Sismonda, 1861 †
- Species Portunus emarginatus Stephenson & Campbell, 1959 accepted as Xiphonectes stephensoni (Moosa, 1981)
- Species Portunus emarginatus Leach, 1814 accepted as Polybius navigator (Herbst, 1794)
- Species Portunus erythrodactylus Lamarck, 1818 accepted as Goniosupradens erythrodactylus (Lamarck, 1818)
- Species Portunus ferreirai (Brito, 1971) †
- Species Portunus gabbi Rathbun, 1919 †
- Species Portunus gallicus (A. Milne-Edwards in de Bouillé, 1873) †
- Species Portunus gibbesii (Stimpson, 1859) accepted as Achelous gibbesii (Stimpson, 1859)
- Species Portunus gladiator Fabricius, 1798 accepted as Monomia gladiator (Fabricius, 1798)
- Species Portunus gracilimanus (Stimpson, 1858) accepted as Lupocycloporus gracilimanus (Stimpson, 1858)
- Species Portunus granulata De Haan, 1833 accepted as Charybdis (Charybdis) granulata (De Haan, 1833)
- Species Portunus guadalpensis de Saussure, 1857 accepted as Macropipus guadalpensis (de Saussure, 1857)
- Species Portunus guaymasensis Garth & Stephenson, 1966 accepted as Achelous guaymasensis (Garth & Stephenson, 1966)
- Species Portunus guinotae Stephenson & Rees, 1961 accepted as Portunus (Xiphonectes) guinotae Stephenson & Rees, 1961
- Species Portunus guttatus Risso, 1816 accepted as Polybius navigator (Herbst, 1794)
- Species Portunus haani (Stimpson, 1858) accepted as Monomia haani (Stimpson, 1858)
- Species Portunus hainanensis Chen, 1986 accepted as Xiphonectes hainanensis (Chen, 1986)
- Species Portunus haitensis Rathbun, 1923 †
- Species Portunus hastatoides Weber, 1795 accepted as Eodemus hastatoides (Fabricius, 1798)
- Species Portunus hastatoides Fabricius, 1798 accepted as Eodemus hastatoides (Fabricius, 1798)
- Species Portunus hastatus (Linnaeus, 1767) accepted as Achelous hastatus (Linnaeus, 1767)
- Species Portunus hawaiiensis Stephenson, 1968
- Species Portunus hericartii Desmarest, 1822 † accepted as Psammocarcinus hericartii (Desmarest, 1822) †
- Species Portunus holsatus Fabricius, 1798 accepted as Polybius holsatus (Fabricius, 1798)
- Species Portunus inaequalis (Miers, 1881) accepted as Achelous inaequalis (Miers, 1881)
- Species Portunus incertus (A. Milne-Edwards, 1860) †
- Species Portunus infractus Otto, 1821 accepted as Bathynectes longipes (Risso, 1816)
- Species Portunus innominatus Rathbun, 1909 accepted as Lupocycloporus innominatus (Rathbun, 1909)
- Species Portunus integifrons Marion de Procé, 1822 accepted as Thalamita admete (Herbst, 1803)
- Species Portunus integrifrons Latreille, 1825 accepted as Nectocarcinus integrifrons (Latreille, 1825)
- Species Portunus iranjae Crosnier, 1962 accepted as Xiphonectes iranjae (Crosnier, 1962)
- Species Portunus jurensis Étallon, 1859 †
- Species Portunus kisslingi Studer, 1892 †
- Species Portunus kochii (Bittner, 1893) †
- Species Portunus krambergeri (Bittner, 1893) †
- Species Portunus lancetidactylus Smirnov, 1929 † accepted as Liocarcinus oligocenicus (Paucă, 1929) †
- Species Portunus larteti (A. Milne-Edwards, 1860) †
- Species Portunus latipes (Pennant, 1977) accepted as Portumnus latipes (Pennant, 1777)
- Species Portunus Leachii Risso, 1827 accepted as Polybius corrugatus (Pennant, 1777)
- Species Portunus lecromi Moosa, 1996 accepted as Allomonomia lecromi (Moosa, 1996)
- Species Portunus leucodon Desmarest, 1822 † accepted as Scylla serrata (Forskål, 1775)
- Species Portunus leucodontes Desmarest, 1817 † accepted as Scylla serrata (Forskål, 1775)
- Species Portunus levifrons Rafinesque, 1814
- Species Portunus levigatus Rathbun, 1945 †
- Species Portunus lividus Leach, 1814 accepted as Polybius holsatus (Fabricius, 1798)
- Species Portunus longipes Risso, 1816 accepted as Bathynectes longipes (Risso, 1816)
- Species Portunus longispinnus (Dana, 1852) accepted as Portunus (Xiphonectes) longispinosus (Dana, 1852)
- Species Portunus lucifer Weber, 1795
- Species Portunus lucifer Fabricius, 1798 accepted as Charybdis (Charybdis) lucifer (Fabricius, 1798)
- Species Portunus macropipus Prestandrea, 1833 accepted as Macropipus tuberculatus (Roux, 1830)
- Species Portunus macropipus Cocco, 1832 accepted as Macropipus tuberculatus (Roux, 1830)
- Species Portunus maculatus Risso, 1827 accepted as Polybius maculatus (Risso, 1827)
- Species Portunus madagascariensis (Hoffmann, 1874)
- Species Portunus maravigna Prestandrea, 1839 accepted as Bathynectes maravigna (Prestandrea, 1839)
- Species Portunus marmoreus Leach, 1814 accepted as Liocarcinus marmoreus (Leach, 1814)
- Species Portunus mauritianus Ward, 1942 accepted as Portunus segnis (Forskål, 1775)
- Species Portunus menestho (Herbst, 1803) accepted as Monomia gladiator (Fabricius, 1798)
- Species Portunus menoides Rafinesque, 1817 accepted as Carcinus aestuarii Nardo, 1847
- Species Portunus minimus Rathbun, 1898 accepted as Achelous minimus (Rathbun, 1898)
- Species Portunus miocaenicus Müller, 1984 †
- Species Portunus mokyevskii Zarenkov, 1970
- Species Portunus monspeliensis (A. Milne-Edwards, 1860) †
- Species Portunus muelleri Collins, 2014 †
- Species Portunus musceli Paucă, 1929 † accepted as Liocarcinus oligocenicus (Paucă, 1929) †
- Species Portunus neogenicus Müller, 1979 †
- Species Portunus nipponensis (Sakai, 1938) accepted as Laleonectes nipponensis (Sakai, 1938)
- Species Portunus oahuensis Edmondson, 1954 accepted as Laleonectes nipponensis (Sakai, 1938)
- Species Portunus oblongus Rathbun, 1920 †
- Species Portunus obtusus (A. Milne-Edwards, 1860) †
- Species Portunus obvallatus Morris & Collins, 1991 †
- Species Portunus oligocenicus Paucă, 1929 † accepted as Liocarcinus oligocenicus (Paucă, 1929) †
- Species Portunus orbitosinus Rathbun, 1911 accepted as Cycloachelous orbitosinus (Rathbun, 1911)
- Species Portunus ordwayi (Stimpson, 1860) accepted as Achelous ordwayi Stimpson, 1860
- Species Portunus pankowskiorum Schweitzer & Feldmann, 2015 †
- Species Portunus parvulus Parisi, 1916 accepted as Polybius pusillus (Leach, 1816)
- Species Portunus pelagicus (Linnaeus, 1758)
- Species Portunus peruvianus d'Orbigny, 1842 † accepted as Chaceon peruvianus (d'Orbigny, 1842) †
- Species Portunus pichilinquei Rathbun, 1930 accepted as Achelous minimus (Rathbun, 1898)
- Species Portunus pictus Say, 1817 accepted as Ovalipes ocellatus (Herbst, 1799)
- Species Portunus pirabaensis Martins-Neto, 2001 †
- Species Portunus pirabensis (Brito, 1971)
- Species Portunus planargiaensis Pasini & Garassino, 2024 †
- Species Portunus plicatus Risso, 1816 accepted as Polybius depurator (Linnaeus, 1758)
- Species Portunus poissonii Audouin, 1826 accepted as Thalamita poissonii (Audouin, 1826)
- Species Portunus ponticus Fabricius, 1798 accepted as Lupocycloporus ponticus (Fabricius, 1798)
- Species Portunus ponticus Weber, 1795 accepted as Lupocycloporus ponticus (Fabricius, 1798)
- Species Portunus pseudoargentatus Stephenson, 1961 accepted as Portunus (Monomia) pseudoargentatus Stephenson, 1961
- Species Portunus pseudohastatoides Yang & Tang, 2006 accepted as Eodemus pseudohastatoides (Yang & Tang, 2006)
- Species Portunus pseudotenuipes Spiridonov, 1999 accepted as Trionectes pseudotenuipes (Spiridonov, 1999)
- Species Portunus puber (Linnaeus, 1767) accepted as Necora puber (Linnaeus, 1767)
- Species Portunus pubescens (Dana, 1852)
- Species Portunus pulchricristatus (Gordon, 1931) accepted as Alionectes pulchricristatus (Gordon, 1931)
- Species Portunus pusillinus Secrétan in Plaziat & Secrétan, 1971 † accepted as Ceronnectes pusillinus (Secrétan in Plaziat & Secrétan, 1971) †
- Species Portunus pusillus Leach, 1816 accepted as Polybius pusillus (Leach, 1816)
- Species Portunus pygmeus Brocchi, 1883 † accepted as Miopipus pygmeus (Brocchi, 1883) †
- Species Portunus radobojanus (Bittner, 1884) †
- Species Portunus rákosensis Lőrenthey in Lőrenthey & Beurlen, 1929 † accepted as Liocarcinus rakosensis (Lőrenthey in Lőrenthey & Beurlen, 1929) †
- Species Portunus regulensis (Van Straelen, 1939) †
- Species Portunus reticulatus (Herbst, 1799)
- Species Portunus ristorii Karasawa, Schweitzer & Feldmann, 2008 †
- Species Portunus rondeletii Risso, 1816 accepted as Liocarcinus rondeletii (Risso, 1816)
- Species Portunus ruber Lamarck, 1818 accepted as Cronius ruber (Lamarck, 1818)
- Species Portunus rufiarcus Davie, 1987
- Species Portunus rufiremus Holthuis, 1959 accepted as Achelous rufiremus (Holthuis, 1959)
- Species Portunus sanguinolentus (Herbst, 1783)
- Species Portunus sanshianus Hu, 1984 †
- Species Portunus sayi (Gibbes, 1850)
- Species Portunus segnis (Forskål, 1775)
- Species Portunus serratifrons (Montrouzier, 1865) accepted as Scylla serrata (Forskål, 1775)
- Species Portunus sijuensis (Satsangi & Parida, 1980) †
- Species Portunus sinuosodactylus Stephenson, 1967 accepted as Lupocycloporus sinuosodactylus (Stephenson, 1967)
- Species Portunus spinicarpus (Stimpson, 1871) accepted as Achelous spinicarpus Stimpson, 1871
- Species Portunus spiniferus Stephenson & Rees, 1967 accepted as Trionectes spiniferus (Stephenson & Rees, 1967)
- Species Portunus spinimanus Latreille, 1819 accepted as Achelous spinimanus (Latreille, 1819)
- Species Portunus stenaspis (Bittner, 1884) †
- Species Portunus stephensoni Moosa, 1981 accepted as Xiphonectes stephensoni (Moosa, 1981)
- Species Portunus straeleni (Vía, 1948) †
- Species Portunus strigilis Stimpson, 1858 accepted as Polybius strigilis (Stimpson, 1858)
- Species Portunus subcorrugatus A. Milne-Edwards, 1861 accepted as Liocarcinus subcorrugatus (A. Milne-Edwards, 1861)
- Species Portunus suborbicularis Stephenson, 1975 accepted as Portunus (Achelous) suborbicularis Stephenson, 1975
- Species Portunus suessii (Bittner, 1875) †
- Species Portunus superbus Costa, 1853 accepted as Bathynectes maravigna (Prestandrea, 1839)
- Species Portunus tenuicaudatus Stephenson, 1961 accepted as Portunus (Xiphonectes) tenuicaudatus Stephenson, 1961
- Species Portunus tenuipes (De Haan, 1835) accepted as Trionectes tenuipes (De Haan, 1835)
- Species Portunus tenuis Rathbun, 1919 †
- Species Portunus thalae Macarovici, 1970 †
- Species Portunus tongfai Hu, 1981 †
- Species Portunus tranquebarica Fabricius, 1798 accepted as Scylla tranquebarica (Fabricius, 1798)
- Species Portunus tranquebaricus Latreille in Milbert, 1812 accepted as Scylla tranquebarica (Fabricius, 1798)
- Species Portunus tranquebaricus Weber, 1795 accepted as Scylla tranquebarica (Fabricius, 1798)
- Species Portunus tridentatus Yang, Dai & Song, 1979 accepted as Trionectes tridentatus (Yang, Dai & Son, 1979)
- Species Portunus trilobatus Stephenson, 1972 accepted as Eodemus unidens (Laurie, 1906)
- Species Portunus trilobus Rafinesque, 1814
- Species Portunus trituberculatus (Miers, 1876)
- Species Portunus tropicalis Marion de Procé, 1822 accepted as Portunus sayi (Gibbes, 1850)
- Species Portunus truncatus Fabricius, 1798 accepted as Charybdis (Archias) truncata (Fabricius, 1798)
- Species Portunus truncatus Weber, 1795
- Species Portunus tuberculatus Roux, 1830 accepted as Macropipus tuberculatus (Roux, 1830)
- Species Portunus Valentieni Cocco, 1833 accepted as Polybius vernalis (Risso, 1827)
- Species Portunus validus Herklots, 1851 accepted as Sanquerus validus (Herklots, 1851)
- Species Portunus variegatus Fabricius, 1798 accepted as Charybdis (Charybdis) variegata (Fabricius, 1798)
- Species Portunus vectensis (Carter, 1898) †
- Species Portunus ventralis (A. Milne-Edwards, 1879) accepted as Achelous ventralis (A. Milne-Edwards, 1879)
- Species Portunus vernalis Risso, 1827 accepted as Polybius vernalis (Risso, 1827)
- Species Portunus viai Secrétan in Philippe & Secrétan, 1971 †
- Species Portunus vicentinus (A. Milne-Edwards, 1860) †
- Species Portunus vicksburgensis Stenzel, 1935 † accepted as Necronectes vicksburgensis (Stenzel, 1935) †
- Species Portunus vigil Fabricius, 1798 accepted as Podophthalmus vigil (Fabricius, 1798)
- Species Portunus vigil Weber, 1795 accepted as Portunus vigil Fabricius, 1798
- Species Portunus vocans (A. Milne-Edwards, 1878) accepted as Laleonectes vocans (A. Milne-Edwards, 1878)
- Species Portunus vossi Lemaitre, 1991 accepted as Achelous spinimanus (Latreille, 1819)
- Species Portunus withersi (Glaessner, 1933) †
- Species Portunus woodwardi Morris & Collins, 1991 †
- Species Portunus wynneanus (Stoliczka, 1871) †
- Species Portunus xantusii (Stimpson, 1860) accepted as Achelous xantusii Stimpson, 1860
- Species Portunus yaucoensis Schweitzer, Iturralde-Vinent, Hetler & Velez-Juarbe, 2006 †
- Genus Rathbunella Collins in Collins, Portell & Donovan, 2009 † accepted as Rathbunites Schweitzer, Dworschak & Martin, 2011 †
- Genus Rathbunites Schweitzer, Dworschak & Martin, 2011 †
- Genus Sanquerus Manning, 1989 (1)
- Genus Trionectes Koch, Spiridonov & Ďuriš, 2022 (7)
- Genus Xiphonectes A. Milne-Edwards, 1873 (14)
- Subfamily Thalamitinae Paulson, 1875 (190)
- Genus Agnonectes Beschin, Busulini & Tessier, 2022 †
- Genus Amphitrite De Haan, 1833 accepted as Monomia Gistel, 1848
- Genus Enoplonotus A. Milne-Edwards, 1860 †
- Genus Gonioneptunus Ortmann, 1893 accepted as Charybdis (Gonioneptunus) Ortmann, 1893
- Genus Lupa Leach, 1814 accepted as Portunus Weber, 1795
- Genus Neptocarcinus Lőrenthey, 1897 †
- Genus Pseudoachelous Portell & Collins, 2004 †
- Genus Sphaerocarcinus Zehntner, 1894 accepted as Caphyra Guérin, 1832
- Family Psammocarcinidae Beurlen, 1930 †
- Family Thiidae Dana, 1852 (2)
- Family Xaividae Berg, 1900 accepted as Platyonichinae Dana, 1851
- Genus Garthopilumnus Števčić, 2011 (1)
- Genus Garthopilumnus Števčić, 2005 accepted as Garthopilumnus Števčić, 2011
- Superfamily Potamoidea Ortmann, 1896 (956)
- Superfamily Pseudocarcinoidea Ng & Davie, 2020 (1)
- Superfamily Pseudothelphusoidea Ortmann, 1893 (301)
- Superfamily Pseudozioidea Alcock, 1898 (27)
- Superfamily Retroplumoidea Gill, 1894 (10)
- Superfamily Thioidea Dana, 1852 accepted as Thiidae Dana, 1852
- Superfamily Trapezioidea Miers, 1886 (58)
- Superfamily Trichodactyloidea H. Milne Edwards, 1853 (52)
- Superfamily Trichopeltarioidea Tavares & Cleva, 2010 (29)
- Superfamily Xanthoidea MacLeay, 1838 (770)
- Subsection Thoracotremata (1 360)
- Section Homoloida (91)
- Section Podotremata accepted as Brachyura
- Section Raninoida (47)
- Section Torynommoida †
- Family Brachyura incertae sedis
- Family Cretapsaridae Luque in Luque, Xing, Briggs, Clark, Duque, Hui, Mai & McKellar, 2021 †
- Family Montemagrechiridae Klompmaker, Portell & van der Meij, 2016 †
- Genus Psammograpsus A. Milne-Edwards, 1860 †
- Genus Zoea Bosc, 1801
- Infraorder Callianassidea accepted as Axiidea
- Infraorder Caridea (3 919)
- Infraorder Gebiidea (252)
- Infraorder Glypheidea (2)
- Infraorder Palaeopalaeomonida †
- Infraorder Polychelida (38)
- Infraorder Procarididea (6)
- Infraorder Stenopodidea (100)
- Suborder Reptantia
- Suborder Trichelida