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)
- 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)
- Family Acanthonychidae Stimpson, 1871 accepted as Epialtidae MacLeay, 1838
- Family Blastidae Stebbing, 1902 accepted as Pisinae Dana, 1851
- Family Epialtidae MacLeay, 1838 (478)
- Family Eurypodiidae MacLeay, 1838 accepted as Inachinae MacLeay, 1838
- Family Huenidae MacLeay, 1838 accepted as Epialtidae MacLeay, 1838
- Family Inachidae MacLeay, 1838 (147)
- Subfamily Achaeinae Dana, 1851 accepted as Inachinae MacLeay, 1838
- Subfamily Anomalopodinae Stimpson, 1871 accepted as Inachidae MacLeay, 1838
- Subfamily Camposcinae Dana, 1851 accepted as Inachinae MacLeay, 1838
- Subfamily Eucinetopinae Števčić, 2005 (4)
- Subfamily Inachinae MacLeay, 1838 (83)
- Subfamily Macrocheirinae Dana, 1851 accepted as Macrocheiridae Dana, 1851
- Subfamily Microrhynchinae Miers, 1879 accepted as Inachidae MacLeay, 1838
- Subfamily Podochelinae Neumann, 1878 (18)
- Genus Achaeopsis Stimpson, 1857 (1)
- Genus Anomalothir Miers, 1879 (3)
- Genus Calypsachaeus Manning & Holthuis, 1981 (1)
- Genus Camposcia Latreille, 1829 (1)
- Genus Capartiella Manning & Holthuis, 1981 (1)
- Genus Chalaroachaeus De Man, 1902 (1)
- Genus Chorinachus Griffin & Tranter, 1986 (1)
- Genus Ephippias Rathbun, 1918 (1)
- Genus Erileptus Rathbun, 1894 (1)
- Genus Litosus Loh & Ng, 1999 (2)
- Genus Metoporhaphis Stimpson, 1860 (1)
- Genus Oncinopus De Haan, 1839 (5)
- Genus Paratymolus Miers, 1879 (10)
- Genus Physachaeus Alcock, 1895 (2)
- Genus Podochela Stimpson, 1860 (4)
- Subgenus Podochela (Anisonotus) A. Milne-Edwards, 1879 accepted as Anisonotus A. Milne-Edwards, 1879
- Subgenus Podochela (Coryrhynchus) Kingsley, 1880 accepted as Coryrhynchus Kingsley, 1880
- Subgenus Podochela (Podonema) Stimpson, 1860 accepted as Coryrhynchus Kingsley, 1880
- Species Podochela angulata Finnegan, 1931 accepted as Ericerodes angulatus (Finnegan, 1931)
- Species Podochela barbarensis Rathbun, 1924 accepted as Coryrhynchus lobifrons (Rathbun, 1894)
- Species Podochela botti Türkay, 1968 accepted as Ericerodes botti (Türkay, 1968)
- Species Podochela brasiliensis Coelho, 1972
- Species Podochela casoae Hendrickx, 1987 accepted as Ericerodes casoae (Hendrickx, 1987)
- Species Podochela curvirostris (A. Milne-Edwards, 1879) accepted as Anisonotus curvirostris A. Milne-Edwards, 1879
- Species Podochela deflexifrons Stimpson, 1860 accepted as Coryrhynchus riisei (Stimpson, 1860)
- Species Podochela gracilipes Stimpson, 1871 accepted as Ericerodes gracilipes (Stimpson, 1871)
- Species Podochela grossipes Stimpson, 1860
- Species Podochela hemphillii (Lockington, 1877) accepted as Ericerodes hemphillii (Lockington, 1877)
- Species Podochela hyopglypha (Stimpson, 1871) accepted as Coryrhynchus riisei (Stimpson, 1860)
- Species Podochela lamelligera (Stimpson, 1871) accepted as Coryrhynchus lamelligerus (Stimpson, 1871)
- Species Podochela macrodera Stimpson, 1860
- Species Podochela margaritaria Rathbun, 1902 accepted as Coryrhynchus margaritarius (Rathbun, 1902)
- Species Podochela meloi Sankarankutty, Ferreira & da Cunha, 2001 accepted as Inachoides forceps A. Milne-Edwards, 1879
- Species Podochela minuscula Coelho, 1972 accepted as Ericerodes minusculus (Coelho, 1972)
- Species Podochela monodi Capart, 1951 accepted as Achaeus monodi (Capart, 1951)
- Species Podochela riisei Stimpson, 1860 accepted as Podochela (Podonema) riisei Stimpson, 1860
- Species Podochela schmitti Garth, 1939 accepted as Ericerodes schmitti (Garth, 1939)
- Species Podochela sidneyi Rathbun, 1924 accepted as Coryrhynchus sidneyi (Rathbun, 1924)
- Species Podochela spatulifrons A. Milne-Edwards, 1879 accepted as Coryrhynchus riisei (Stimpson, 1860)
- Species Podochela spinifrons Rathbun, 1894 accepted as Anisonotus curvirostris A. Milne-Edwards, 1879
- Species Podochela tenuipes Rathbun, 1894 accepted as Ericerodes hemphillii (Lockington, 1877)
- Species Podochela veleronis Garth, 1958 accepted as Ericerodes veleronis (Garth, 1958)
- Species Podochela ziesenhennei Garth, 1940
- Genus Prosphorachaeus Takeda & Miyake, 1969 (4)
- Genus Pseudocollodes Rathbun, 1911 accepted as Inachus Weber, 1795
- Genus Rhinospinosa Griffin & Tranter, 1986 (1)
- Genus Sunipea Griffin & Tranter, 1986 (2)
- Family Inachoididae Dana, 1851 (43)
- Family Leptopodiadae Bell, 1836 accepted as Leptopodidae Bell, 1836
- Family Leptopodidae Bell, 1836 accepted as Inachinae MacLeay, 1838
- Family Leptopodiidae Bell, 1836 accepted as Leptopodidae Bell, 1836
- Family Macrocheiridae Dana, 1851 (1)
- Family Macropodiadae Samouelle, 1819 accepted as Inachinae MacLeay, 1838
- Family Maïadae Samouelle, 1819 accepted as Majinae Samouelle, 1819
- Family Majidae Samouelle, 1819 (155)
- Family Mamaiidae Stebbing, 1905 accepted as Majinae Samouelle, 1819
- Family Mithracidae MacLeay, 1838 (60)
- Family Oncinopodidae Stimpson, 1857 accepted as Inachidae MacLeay, 1838
- Family Oregoniidae Garth, 1958 (84)
- Family Periacanthidae Lőrenthey in Lőrenthey & Beurlen, 1929 † accepted as Epialtidae MacLeay, 1838
- Family Periceridae Dana, 1851 accepted as Pisinae Dana, 1851
- Family Pisidae Dana, 1851 accepted as Pisinae Dana, 1851
- Family Priscinachidae Breton, 2009 †
- Family Tychidae Dana, 1851 accepted as Epialtidae MacLeay, 1838
- Family Tychiidae Dana, 1851 accepted as Epialtidae MacLeay, 1838
- 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)
- 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