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)
- Subsection Thoracotremata (1 360)
- Superfamily Aphanodactyloidea Ahyong & Ng, 2009 (16)
- Superfamily Cryptochiroidea Paulson, 1875 (56)
- Superfamily Grapsoidea MacLeay, 1838 (645)
- Superfamily Ocypodoidea Rafinesque, 1815 (332)
- Family Camptandriidae Stimpson, 1858 (42)
- Family Dotillidae Stimpson, 1858 (69)
- Family Gelasimidae Miers, 1886 accepted as Ocypodidae Rafinesque, 1815
- Family Heloeciidae H. Milne Edwards, 1852 (1)
- Family Lazarocleistostomidae Števčić, 2011 accepted as Dotillinae Stimpson, 1858
- Family Macrophthalmidae Dana, 1851 (74)
- Family Mictyridae Dana, 1851 (8)
- Family Ocypodidae Rafinesque, 1815 (133)
- Subfamily Gelasiminae Miers, 1886 (98)
- Genus Amphiuca Crane, 1975 accepted as Paraleptuca Bott, 1973
- Genus Australuca Crane, 1975 accepted as Tubuca Bott, 1973
- Genus Austruca Bott, 1973 (13)
- Genus Boboruca Crane, 1975 accepted as Leptuca Bott, 1973
- Genus Celuca Crane, 1975 accepted as Leptuca Bott, 1973
- Genus Cranuca Beinlich & von Hagen, 2006 (1)
- Genus Deltuca Crane, 1975 accepted as Tubuca Bott, 1973
- Genus Gelasimus Latreille, 1817 (8)
- Subgenus Gelasimus (Acanthoplax) (H. Milne Edwards, 1852) accepted as Uca Leach, 1814
- Species Gelasimus acutus Stimpson, 1858 accepted as Uca (Tubuca) acuta (Stimpson, 1858)
- Species Gelasimus affinis Streets, 1872 accepted as Minuca burgersi (Holthuis, 1967)
- Species Gelasimus affinis Guérin, 1829 accepted as Gelasimus tetragonon (Herbst, 1790)
- Species Gelasimus annulipes H. Milne Edwards, 1837 accepted as Uca (Austruca) annulipes (H. Milne Edwards, 1837)
- Species Gelasimus arcuatus (De Haan, 1835) accepted as Tubuca arcuata (De Haan, 1835)
- Species Gelasimus armatus Smith, 1870 accepted as Uca (Uca) insignis (H. Milne Edwards, 1852)
- Species Gelasimus bellator White, 1847 accepted as Tubuca bellator (White, 1847)
- Species Gelasimus Bellii J Couch, 1838 accepted as Goneplax rhomboides (Linnaeus, 1758)
- Species Gelasimus borealis (Crane, 1975)
- Species Gelasimus brevifrons Stimpson, 1860 accepted as Minuca brevifrons (Stimpson, 1860)
- Species Gelasimus brevipes H. Milne Edwards, 1852 accepted as Tubuca arcuata (De Haan, 1835)
- Species Gelasimus caerulens Adams, 1847 accepted as Tubuca paradussumieri (Bott, 1973)
- Species Gelasimus chlorophthalmus H. Milne Edwards, 1837 accepted as Paraleptuca chlorophthalmus (H. Milne Edwards, 1837)
- Species Gelasimus cimatodus de Rochebrune, 1883 accepted as Afruca tangeri (Eydoux, 1835)
- Species Gelasimus coarctatus H. Milne Edwards, 1852 accepted as Tubuca coarctata (H. Milne Edwards, 1852)
- Species Gelasimus coloradensis Rathbun, 1894 accepted as Leptuca coloradensis (Rathbun, 1894)
- Species Gelasimus cordiformis H. Milne Edwards, 1837 accepted as Heloecius cordiformis (H. Milne Edwards, 1837)
- Species Gelasimus crassipes White, 1847 accepted as Paraleptuca crassipes (White, 1847)
- Species Gelasimus crenulatus Lockington, 1877 accepted as Leptuca crenulata (Lockington, 1877)
- Species Gelasimus cultrimanus White, 1847 accepted as Gelasimus vocans (Linnaeus, 1758)
- Species Gelasimus dampieri (Crane, 1975)
- Species Gelasimus dubius Stimpson, 1858 accepted as Tubuca dussumieri (H. Milne Edwards, 1852)
- Species Gelasimus Duperreyi Guérin, 1829 accepted as Gelasimus tetragonon (Herbst, 1790)
- Species Gelasimus Dussumieri H. Milne Edwards, 1852 accepted as Tubuca dussumieri (H. Milne Edwards, 1852)
- Species Gelasimus excisus (Nobili, 1906)
- Species Gelasimus forceps H. Milne Edwards, 1837 accepted as Austruca lactea (De Haan, 1835)
- Species Gelasimus forcipatus Adams & White, 1849 accepted as Tubuca forcipata (Adams & White, 1849)
- Species Gelasimus Gaimardi H. Milne Edwards, 1852 accepted as Paraleptuca crassipes (White, 1847)
- Species Gelasimus gibbosus Smith, 1870 accepted as Leptuca stenodactylus (H. Milne Edwards & Lucas, 1843)
- Species Gelasimus gracilis Rathbun, 1894 accepted as Leptuca crenulata (Lockington, 1877)
- Species Gelasimus grangeri Desbonne in Desbonne & Schram, 1867 accepted as Uca major (Herbst, 1782)
- Species Gelasimus hesperiae (Crane, 1975)
- Species Gelasimus heterophthalmus Smith, 1870 accepted as Uca (Uca) stylifera (H. Milne Edwards, 1852)
- Species Gelasimus heteropleurus Smith, 1870 accepted as Uca heteropleura (Smith, 1870)
- Species Gelasimus Huttoni Filhol, 1885
- Species Gelasimus inversus Hoffmann, 1874 accepted as Cranuca inversa (Hoffmann, 1874)
- Species Gelasimus jocelynae (Shih, Naruse & Ng, 2010)
- Species Gelasimus lacteus (De Haan, 1835) accepted as Austruca lactea (De Haan, 1835)
- Species Gelasimus latimanus Rathbun, 1894 accepted as Leptuca latimanus (Rathbun, 1894)
- Species Gelasimus Latreillei H. Milne Edwards, 1852 accepted as Paraleptuca crassipes (White, 1847)
- Species Gelasimus longidigitum Kingsley, 1880 accepted as Tubuca longidigitum (Kingsley, 1880)
- Species Gelasimus macrodactylus H. Milne Edwards & Lucas, 1843 accepted as Minuca galapagensis (Rathbun, 1902)
- Species Gelasimus maracoani (Latreille, 1803) accepted as Uca (Uca) maracoani (Latreille, 1803)
- Species Gelasimus marionis Desmarest, 1823 accepted as Gelasimus vocans (Linnaeus, 1758)
- Species Gelasimus minax Le Conte, 1855 accepted as Minuca minax (Le Conte, 1855)
- Species Gelasimus minor Owen, 1839
- Species Gelasimus mordax Smith, 1870 accepted as Minuca mordax (Smith, 1870)
- Species Gelasimus neocultrimanus (Bott, 1973) accepted as Gelasimus excisus (Nobili, 1906)
- Species Gelasimus nitidus Dana, 1851 accepted as Gelasimus vocans (Linnaeus, 1758)
- Species Gelasimus ornatus Smith, 1870 accepted as Uca (Uca) ornata (Smith, 1870)
- Species Gelasimus palustris H. Milne Edwards, 1852 accepted as Minuca rapax (Smith, 1870)
- Species Gelasimus panamensis Stimpson, 1859 accepted as Petruca panamensis (Stimpson, 1859)
- Species Gelasimus perplexus H. Milne Edwards, 1852 accepted as Austruca perplexa (H. Milne Edwards, 1852)
- Species Gelasimus platydactylus H. Milne Edwards, 1837 accepted as Uca major (Herbst, 1782)
- Species Gelasimus porcellanus White, 1847 accepted as Austruca annulipes (H. Milne Edwards, 1837)
- Species Gelasimus princeps Smith, 1870 accepted as Uca (Uca) princeps (Smith, 1870)
- Species Gelasimus pugilator (Bosc, 1801) accepted as Leptuca pugilator (Bosc, 1801)
- Species Gelasimus pugnax Smith, 1870 accepted as Minuca pugnax (Smith, 1870)
- Species Gelasimus pulchellus Stimpson, 1858 accepted as Paraleptuca crassipes (White, 1847)
- Species Gelasimus rapax Smith, 1870 accepted as Minuca rapax (Smith, 1870)
- Species Gelasimus rectilatus Lockington, 1877
- Species Gelasimus roseus Tweedie, 1937 accepted as Tubuca rosea (Tweedie, 1937)
- Species Gelasimus rubripes Hombron & Jacquinot, 1846
- Species Gelasimus signata Hess, 1865 accepted as Tubuca signata (Hess, 1865)
- Species Gelasimus signatus Hess, 1865 accepted as Tubuca signata (Hess, 1865)
- Variety Gelasimus signatus var. angustifrons De Man, 1891 accepted as Uca (Australuca) bellator (White, 1847)
- Species Gelasimus smithii Kingsley, 1880 accepted as Uca (Cranuca) inversa (Hoffmann, 1874)
- Species Gelasimus speciosa Ives, 1891 accepted as Leptuca speciosa (Ives, 1891)
- Species Gelasimus splendidus Stimpson, 1858 accepted as Paraleptuca splendida (Stimpson, 1858)
- Species Gelasimus stenodactylus H. Milne Edwards & Lucas, 1843 accepted as Leptuca stenodactylus (H. Milne Edwards & Lucas, 1843)
- Species Gelasimus styliferus H. Milne Edwards, 1852 accepted as Uca stylifera (H. Milne Edwards, 1852)
- Species Gelasimus subcylindricus Stimpson, 1859 accepted as Leptuca subcylindrica (Stimpson, 1859)
- Species Gelasimus tangeri Eydoux, 1835 accepted as Afruca tangeri (Eydoux, 1835)
- Species Gelasimus telescopicus Owen, 1839 accepted as Macrophthalmus (Macrophthalmus) telescopicus (Owen, 1839)
- Species Gelasimus tetragonon (Herbst, 1790)
- Species Gelasimus thomsoni Kirk, 1881 accepted as Tubuca coarctata (H. Milne Edwards, 1852)
- Species Gelasimus triangularis A. Milne-Edwards, 1873 accepted as Austruca triangularis (A. Milne-Edwards, 1873)
- Species Gelasimus Urvillei H. Milne Edwards, 1852 accepted as Tubuca urvillei (H. Milne Edwards, 1852)
- Species Gelasimus variatus Hess, 1865 accepted as Gelasimus tetragonon (Herbst, 1790)
- Species Gelasimus variegatus Heller, 1862 accepted as Austruca variegata (Heller, 1862)
- Species Gelasimus vocans (Linnaeus, 1758)
- Species Gelasimus vocator (Herbst, 1804) accepted as Minuca vocator (Herbst, 1804)
- Species Gelasimus vomeris (McNeill, 1920)
- Genus Leptuca Bott, 1973 (30)
- Genus Mesuca Bott, 1973 accepted as Gelasimus Latreille, 1817
- Genus Minuca Bott, 1954 (18)
- Genus Paraleptuca Bott, 1973 (4)
- Genus Petruca Shih, Ng & Christy, 2015 (1)
- Genus Planuca Bott, 1973 accepted as Leptuca Bott, 1973
- Genus Thalassuca Crane, 1975 accepted as Gelasimus Latreille, 1817
- Genus Tubuca Bott, 1973 (22)
- Genus Xeruca Shih, 2015 (1)
- Subfamily Ocypodinae Rafinesque, 1815 (33)
- Subfamily Scopimerinae Alcock, 1900 accepted as Dotillinae Stimpson, 1858
- Subfamily Ucainae Dana, 1851 accepted as Ocypodinae Rafinesque, 1815
- Subfamily Ucidinae Števčić, 2005 (2)
- Subfamily Ucinae Dana, 1851 accepted as Ocypodinae Rafinesque, 1815
- Family Scopimeridae Alcock, 1900 accepted as Dotillinae Stimpson, 1858
- Family Ucididae Števčić, 2005 accepted as Ucidinae Števčić, 2005
- Family Xenophthalmidae Stimpson, 1858 (5)
- Superfamily Pinnotheroidea De Haan, 1833 (311)
- 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