Between brackets is the number of accepted extant species
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- Decapoda (17 684)
- Suborder Decapoda incertae sedis †
- Suborder Dendrobranchiata (533)
- Suborder Euzygida accepted as Stenopodidea
- Suborder Heterochelida
- Suborder Macrura
- Suborder Macrura reptantia
- Suborder Natantia
- Suborder Pleocyemata (17 151)
- Infraorder Achelata (153)
- Infraorder Anomura (3 414)
- Superfamily Aegloidea Dana, 1852 (97)
- Superfamily Birgusoidea Watabe, 2007 accepted as Paguroidea Latreille, 1802
- Superfamily Cancellochelloidea Watabe, 2007 accepted as Paguroidea Latreille, 1802
- Superfamily Cheiroplatoidea Watabe, 2007 accepted as Paguroidea Latreille, 1802
- Superfamily Chirostyloidea Ortmann, 1892 (419)
- Superfamily Eocarcinoidea Withers, 1932 †
- Superfamily Galatheoidea Samouelle, 1819 (1 406)
- Superfamily Gastrodoroidea Van Bakel, Fraaije, Jagt & Artal, 2008 †
- Superfamily Hippoidea Latreille, 1825 (86)
- Superfamily Kiwaoidea Macpherson, Jones & Segonzac, 2005 accepted as Chirostyloidea Ortmann, 1892
- Superfamily Lithodoidea Samouelle, 1819 accepted as Lithodidae Samouelle, 1819
- Superfamily Lomisoidea Bouvier, 1894 (1)
- Superfamily Paguroidea Latreille, 1802 (1 405)
- Family Annuntidiogenidae Fraaije, 2014 †
- Family Calcinidae Fraaije, Van Bakel & Jagt, 2017 accepted as Diogenidae Ortmann, 1892
- Family Cenobitidae Dana, 1851 accepted as Coenobitidae Dana, 1851
- Family Coenobitidae Dana, 1851 (18)
- Family Diogenidae Ortmann, 1892 (488)
- Genus Allodardanus Haig & Provenzano, 1965 (3)
- Genus Aniculus Dana, 1852 (9)
- Genus Areopaguristes Rahayu & McLaughlin, 2010 (30)
- Genus Bachmayerus Fraaije, Van Bakel, Jagt & Skupein, 2013 †
- Genus Bathynarius Forest, 1989 (5)
- Genus Calcinus Dana, 1851 (47)
- Genus Cancellus H. Milne Edwards, 1836 (17)
- Genus Chlaenopagurus Alcock, 1899 accepted as Paguropsis Henderson, 1888
- Genus Ciliopagurus Forest, 1995 (19)
- Genus Clibanarius Dana, 1852 (58)
- Genus Cretacocalcinus Ferratges, Hyžný & Zamora, 2021 †
- Genus Dardanus Paulson, 1875 (47)
- Species Dardanus agnoensis Bechin, Busulini & Tessier, 2022 †
- Species Dardanus arnoldi Rathbun, 1926 †
- Species Dardanus arrosor (Herbst, 1796)
- Species Dardanus asper (De Haan, 1849) accepted as Dardanus pedunculatus (Herbst, 1804)
- Species Dardanus aspersus (Berthold, 1846)
- Species Dardanus australis Forest & Morgan, 1991
- Species Dardanus balaitus Ferratges, Artal, Van Bakel & Zamora, 2022 †
- Species Dardanus balhibuon Malay, Rahayu & Chan, 2018
- Species Dardanus bayani Beschin, Busulini, Tessier & Zorzin, 2016 †
- Species Dardanus biordines Collins & Todd in Todd & Collins, 2005
- Species Dardanus brachyops Forest, 1962
- Species Dardanus braggensis Beschin, Busulini & Tessier, 2015 †
- Species Dardanus calidus (Risso, 1827)
- Species Dardanus callichela Cook, 1989
- Species Dardanus caporiondoi Ceccon & De Angeli, 2019 †
- Species Dardanus cataphractus (Boone, 1938) accepted as Dardanus guttatus (Olivier, 1812)
- Species Dardanus cherpionensis Marangon & De Angeli, 2020 †
- Species Dardanus colosseus Fraaije & Polkowsky, 2016 †
- Species Dardanus corrugatus Cook, 1989
- Species Dardanus crassimanus (H. Milne Edwards, 1836)
- Species Dardanus curtimanus Müller & Collins, 1991 †
- Species Dardanus cyprioticus Wallaard, Fraaije, Van Bakel, Jagt & Müller, 2023 †
- Species Dardanus dearmatus (Henderson, 1888)
- Species Dardanus deformis (H. Milne Edwards, 1836)
- Species Dardanus dermatus (Henderson, 1888) accepted as Dardanus dearmatus (Henderson, 1888)
- Species Dardanus fabimanus (Dana, 1851) accepted as Dardanus scutellatus (H. Milne Edwards, 1848)
- Species Dardanus faxensis Jakobsen, Fraaije, Jagt & Van Bakel, 2020 †
- Species Dardanus fucosus Biffar & Provenzano, 1972
- Species Dardanus gemmatus (H. Milne Edwards, 1848)
- Species Dardanus granulimanus (Miers, 1881) accepted as Pseudopagurus granulimanus (Miers, 1881)
- Species Dardanus guttatus (Olivier, 1812)
- Species Dardanus haanii Rathbun, 1902 accepted as Dardanus pedunculatus (Herbst, 1804)
- Species Dardanus helleri Paulson, 1875 accepted as Dardanus lagopodes (Forskål, 1775)
- Species Dardanus hessii (Miers, 1884)
- Species Dardanus holthuisi Rahayu, 2010
- Species Dardanus hungaricus (Lőrenthey in Lőrenthey & Beurlen, 1929) †
- Species Dardanus imbricatus (H. Milne Edwards, 1848)
- Species Dardanus imbricatus Rathbun, 1910 † accepted as Dardanus sinistripes (Stimpson, 1859)
- Species Dardanus imperator (Miers, 1881)
- Species Dardanus impressus (De Haan, 1849)
- Species Dardanus insignis (de Saussure, 1857)
- Species Dardanus jacquesi Asakura & Hirayama, 2002
- Species Dardanus janethaigae Ayón Parente & Hendrickx, 2009
- Species Dardanus jordani Schmitt, 1921 accepted as Dardanus megistos (Herbst, 1804)
- Species Dardanus lagopodes (Forskål, 1775)
- Species Dardanus lauensis Rathbun, 1945 †
- Species Dardanus longior Asakura, 2006
- Species Dardanus magdalenensis Ayón Parente & Hendrickx, 2009
- Species Dardanus mediterraneus (Lőrenthey, 1907) †
- Species Dardanus megistos (Herbst, 1804)
- Species Dardanus megsitos (Herbst, 1804) accepted as Dardanus megistos (Herbst, 1804)
- Species Dardanus mexicanus Vega, Cosma, Coutino, Feldmann, Nyborg, Schweitzer & Waugh, 2001 † accepted as Paguristes mexicanus (Vega, Cosma, Coutino, Feldmann, Nyborg, Schweitzer & Waugh, 2001) †
- Species Dardanus muelleri Karasawa & Inoue, 1992 †
- Species Dardanus nudus Ayón Parente & Hendrickx, 2009
- Species Dardanus pectinatus (Ortmann, 1892)
- Species Dardanus pedunculatus (Herbst, 1804)
- Species Dardanus pilosus Ayón Parente & Hendrickx, 2009
- Species Dardanus plevrotos Wallaard, Fraaije, Van Bakel, Jagt & Müller, 2023 †
- Species Dardanus portmorantensis Collins & Donovan, 2010 †
- Species Dardanus quthatus (Olivier, 1812) accepted as Dardanus guttatus (Olivier, 1812)
- Species Dardanus robustus Asakura, 2006
- Species Dardanus rufus Buitendijk, 1937
- Species Dardanus sanguinocarpus Degener in Edmondson, 1925
- Species Dardanus sanguinolentus (Quoy & Gaimard, 1824)
- Species Dardanus scutellatus (H. Milne Edwards, 1848)
- Species Dardanus setifer (H. Milne Edwards, 1836)
- Species Dardanus sinistripes (Stimpson, 1859)
- Species Dardanus spinimanus (H. Milne Edwards, 1848) accepted as Dardanus megistos (Herbst, 1804)
- Species Dardanus squamatus Collins in Collins, Portell & Donovan, 2009 †
- Species Dardanus squarrosus Cook, 1989
- Species Dardanus stimpsoni Ayón Parente & Hendrickx, 2009
- Species Dardanus subaequalis Rathbun, 1926 † accepted as Paguristes subaequalis (Rathbun, 1926) †
- Species Dardanus substriatus (A. Milne-Edwards in Sismonda, 1861) †
- Species Dardanus suessi Beschin, Busulini, Tessier & Zorzin, 2016 †
- Species Dardanus sulcatus Edmondson, 1925
- Species Dardanus tinctor (Forskål, 1775)
- Species Dardanus umbella Asakura, 2006
- Species Dardanus undulatus (Balss, 1921)
- Species Dardanus vandeneeckhauti Fraaije, Van Bakel, Iserbyt & Jagt, 2011 †
- Species Dardanus varipes (Heller, 1861) accepted as Dardanus tinctor (Forskål, 1775)
- Species Dardanus venosus (H. Milne Edwards, 1848)
- Species Dardanus vulnerans (Thallwitz, 1891)
- Species Dardanus woodmasoni (Alcock, 1905)
- Genus Diogenes Dana, 1851 (84)
- Genus Eocalcinus Vía Boada, 1959 †
- Genus Eopaguropsis Van Bakel, Fraaije, Jagt & Artal, 2008 †
- Genus Gryllopagurus Zietz, 1888 accepted as Cancellus H. Milne Edwards, 1836
- Genus Holopagurus Holmes, 1900 accepted as Isocheles Stimpson, 1858
- Genus Isocheles Stimpson, 1858 (6)
- Genus Joecalcinus Fraaije, Beschin, Busulini, Tessier, Jagt & Van Bakel, 2020 †
- Genus Longipaguristes De Angeli & Caporiondo, 2017 †
- Genus Loxopagurus Forest, 1964 (1)
- Genus Neopagurus Kamalaveni, 1950 accepted as Dardanus Paulson, 1875
- Genus Pagurias Benedict, 1901 accepted as Dardanus Paulson, 1875
- Genus Paguristes Dana, 1851 (122)
- Genus Pagurites Dana, 1851 accepted as Paguristes Dana, 1851
- Genus Paguropsina Lemaitre, Rahayu & Komai, 2018 (2)
- Genus Paguropsis Henderson, 1888 (5)
- Genus Palaeopetrochirus Bishop, 1991 †
- Genus Parapetrochirus Ferratges, Artal & Zamora, 2021 †
- Genus Paronapaguropsis Beschin, Busulini, Tessier, Fraaije & Jagt, 2021 †
- Genus Petrochirus Stimpson, 1858 (3)
- Genus Pseudopaguristes McLaughlin, 2002 (16)
- Genus Pseudopagurus Forest, 1952 (2)
- Genus Sandiegocalcinus Nyborg, Fraaije & Dunbar, 2023 †
- Genus Stratiotes Thomson, 1899 accepted as Areopaguristes Rahayu & McLaughlin, 2010
- Genus Striadiogenes Garassino, De Angeli & Pasini, 2009 †
- Genus Strigopagurus Forest, 1995 (6)
- Genus Tetralobistes Ayon-Parente & Hendrickx, 2010 (2)
- Genus Tisea Morgan & Forest, 1991 (1)
- Genus Tithopaguristes Fraaije, Robins, Van Bakel, Jagt & Bachmayer, 2019 †
- Genus Trizopagurus Forest, 1952 (3)
- Genus Troglopagurus Henderson, 1893 accepted as Diogenes Dana, 1851
- Genus Ululapagurus Fraaije, 2014 †
- Family Eupaguridae Terao, 1915 accepted as Paguridae Latreille, 1802
- Family Hapalogastridae Brandt, 1850 accepted as Hapalogastrinae Brandt, 1850
- Family Lithodidae Samouelle, 1819 (136)
- Family Ostraconotidae Terao, 1915 accepted as Paguridae Latreille, 1802
- Family Paguridae Latreille, 1802 (615)
- Family Paguristidae Terao, 1915 accepted as Diogenidae Ortmann, 1892
- Family Paguropsidae Fraaije, Van Bakel, Jagt, Charbonnier, Schweigert, Garcia & Valentin, 2022 accepted as Diogenidae Ortmann, 1892
- Family Parapaguridae Smith, 1882 (92)
- Family Parapylochelidae Forest, 1987 accepted as Pylochelidae Spence Bate, 1888
- Family Pilgrimchelidae Fraaije, 2014 †
- Family Pomatochelidae Stebbing, 1914 accepted as Pylochelidae Spence Bate, 1888
- Family Probeebeidae Boone, 1926 accepted as Parapaguridae Smith, 1882
- Family Pylochelidae Spence Bate, 1888 (47)
- Family Pylojacquesidae McLaughlin & Lemaitre, 2001 (2)
- Family Schobertellidae Schweigert, Fraaije, Havlik & Nützel, 2013 †
- Family Xylopaguridae Gašparič, Fraaije, Robin & de Angeli, 2016 (7)
- Superfamily Pomatocheloidea Watabe, 2007 accepted as Paguroidea Latreille, 1802
- Superfamily Pylocheloidea Watabe, 2007 accepted as Paguroidea Latreille, 1802
- Infraorder Astacidea (783)
- Infraorder Axiidea (600)
- Infraorder Brachyura (7 884)
- 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