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)
- 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)
- 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)
- Genus Acanthopagurus de Saint Laurent, 1968 (1)
- Genus Agaricochirus McLaughlin, 1982 (8)
- Genus Alainopaguroides McLaughlin, 1997 (4)
- Genus Alainopagurus Lemaitre & McLaughlin, 1995 (1)
- Genus Alloeopagurodes Komai, 1998 (1)
- Genus Anapagrides de Saint Laurent-Dechancé, 1966 (3)
- Genus Anapagurus Henderson, 1886 (19)
- Genus Anisopagurus McLaughlin, 1981 (6)
- Genus Australeremus McLaughlin, 1981 accepted as Lophopagurus (Australeremus) McLaughlin, 1981
- Genus Bathypaguropsis McLaughlin, 1994 (7)
- Genus Benthopagurus Wass, 1963 accepted as Tomopagurus A. Milne-Edwards & Bouvier, 1893
- Genus Bernhardus Dana, 1851 accepted as Pagurus Fabricius, 1775
- Genus Boninpagurus Asakura & Tachikawa, 2004 (1)
- Genus Bythiopagurus McLaughlin, 2003 (1)
- Genus Capsulapagurus Fraaije, Van Bakel, Iserbyt & Jagt, 2011 †
- Genus Catapaguroides A. Milne-Edwards & Bouvier, 1892 (32)
- Species Catapaguroides acanthodes Fenizia, 1935 accepted as Cestopagurus timidus (Roux, 1830)
- Species Catapaguroides acutifrons A. Milne-Edwards & Bouvier, 1892 accepted as Cestopagurus timidus (Roux, 1830)
- Species Catapaguroides brevidactylus Komai & Rahayu, 2013
- Species Catapaguroides bythos Komai, 2017
- Species Catapaguroides conicus Komai & Rahayu, 2013
- Species Catapaguroides crassimanus Komai & Rahayu, 2013
- Species Catapaguroides crassipes Fenizia, 1935 accepted as Cestopagurus timidus (Roux, 1830)
- Species Catapaguroides cristimanus de Saint Laurent, 1968
- Species Catapaguroides declivis McLaughlin, 1997
- Species Catapaguroides foresti McLaughlin, 2002
- Species Catapaguroides fragilis (Melin, 1939)
- Species Catapaguroides hirsutus Komai & Rahayu, 2013
- Species Catapaguroides hooveri McLaughlin & Pittman, 2002
- Species Catapaguroides iejimensis Osawa & Takeda, 2004
- Species Catapaguroides inermis de Saint Laurent, 1968
- Species Catapaguroides iris Bouvier, 1922
- Species Catapaguroides japonicus de Saint Laurent, 1968
- Species Catapaguroides karubar McLaughlin, 1997
- Species Catapaguroides kasei Osawa & Takeda, 2004 accepted as Catapaguroides foresti McLaughlin, 2002
- Species Catapaguroides levigatus Komai & Rahayu, 2013
- Species Catapaguroides longior Komai, Yamada & Shirakawa, 2010
- Species Catapaguroides macrochirus Fenizia, 1937 accepted as Cestopagurus timidus (Roux, 1830)
- Species Catapaguroides macrophthalmus Bouvier, 1922 accepted as Acanthopagurus dubius (A. Milne-Edwards & Bouvier, 1898)
- Species Catapaguroides megalops A. Milne-Edwards & Bouvier, 1892
- Species Catapaguroides melini de Saint Laurent, 1968
- Species Catapaguroides microps A. Milne-Edwards & Bouvier, 1892
- Species Catapaguroides mortenseni de Saint Laurent, 1968
- Species Catapaguroides ngankeeae Osawa & Sato, 2024
- Species Catapaguroides olfaciens (Alcock, 1905)
- Species Catapaguroides pectinipes (Lewinsohn, 1969)
- Species Catapaguroides pusillus Komai & Rahayu, 2013
- Species Catapaguroides rubromaculatus Komai, 2017
- Species Catapaguroides setosus (Edmondson, 1951)
- Species Catapaguroides spinulimanus de Saint Laurent, 1968
- Species Catapaguroides tanseiae Komai, 2014
- Species Catapaguroides tenuiclavus Komai & Rahayu, 2013
- Species Catapaguroides timidus (Roux, 1830) accepted as Cestopagurus timidus (Roux, 1830)
- Species Catapaguroides trichophthalmus Forest, 1954 accepted as Trichopagurus trichophthalmus (Forest, 1954)
- Species Catapaguroides tuber Komai & Rahayu, 2013
- Species Catapaguroides umbra Komai, 2009
- Genus Catapaguropsis Lemaitre & McLaughlin, 2006 (2)
- Genus Catapagurus A. Milne-Edwards, 1880 (28)
- Genus Ceratopagurus Yokoya, 1933 (1)
- Genus Cestopagurus Bouvier, 1897 (5)
- Genus Chanopagurus Lemaitre, 2003 (1)
- Genus Cycetopagurus McLaughlin, 2004 (1)
- Genus Decaphyllus de Saint Laurent, 1968 (11)
- Genus Dentalopagurus McLaughlin, 2007 (2)
- Genus Diacanthurus McLaughlin & Forest, 1997 (5)
- Genus Discorsopagurus McLaughlin, 1974 (4)
- Genus Dofleinia McLaughlin & Asakura, 2004 accepted as Pagurodofleinia Asakura, 2005
- Genus Elassochirus Benedict, 1892 (3)
- Genus Enallopaguropsis McLaughlin, 1981 (3)
- Genus Enallopagurus McLaughlin, 1981 (4)
- Genus Enneobranchus García-Gómez, 1988 (3)
- Genus Enneopagurus McLaughlin, 1997 (1)
- Genus Enneophyllus McLaughlin, 1997 (2)
- Genus Eupagurus Brandt, 1851 accepted as Pagurus Fabricius, 1775
- Genus Eutrichopagurus Komai, 2015 (3)
- Genus Forestopagurus García-Gómez, 1994 (1)
- Genus Galapagurus Boone, 1932 accepted as Pylopaguropsis Alcock, 1905
- Genus Gammarolithes von Schlotheim, 1832 † accepted as Gamarrholithes von Schlotheim, 1832 †
- Genus Goniochirus Étallon, 1861 †
- Genus Goreopagurus McLaughlin, 1988 (4)
- Genus Hachijopagurus Osawa & Okuno, 2003 (1)
- Genus Haigia McLaughlin, 1981 accepted as Haigiopagurus McLaughlin, 2005
- Genus Haigiopagurus McLaughlin, 2005 (1)
- Genus Hemipagurus Smith, 1881 accepted as Catapagurus A. Milne-Edwards, 1880
- Genus Icelopagurus McLaughlin, 1997 (2)
- Genus Iridopagurus de Saint Laurent-Dechancé, 1966 (10)
- Genus Jacquesia de Saint Laurent & McLaughlin, 1999 accepted as Pagurojacquesia de Saint Laurent & McLaughlin in Forest, de Saint Laurent, McLaughlin & Lemaitre, 2000
- Genus Kumepagurus Komai & Osawa, 2012 (2)
- Genus Labidochirus Benedict, 1892 (2)
- Genus Latro Billberg, 1820 accepted as Pagurus Fabricius, 1775
- Genus Laurentia McLaughlin & Haig, 1996 accepted as Turleania McLaughlin, 1997
- Genus Leptopagurus Lemaitre, Felder & Poupin, 2017 (1)
- Genus Lithopagurus Provenzano, 1968 (3)
- Genus Litorepagurus Fraaije, Van Bakel, Jagt, Wallaard & De Coninck, 2023 †
- Genus Lophopagurus McLaughlin, 1981 (15)
- Genus Manucomplanus McLaughlin, 1981 (5)
- Genus Michelopagurus McLaughlin, 1997 (5)
- Genus Micropagurus McLaughlin, 1986 (6)
- Genus Munidopagurus A. Milne-Edwards & Bouvier, 1893 (1)
- Genus Nanopagurus McLaughlin, 1986 accepted as Anapagrides de Saint Laurent-Dechancé, 1966
- Genus Nematopaguroides Forest & de Saint Laurent, 1968 (3)
- Genus Nematopagurus A. Milne-Edwards & Bouvier, 1892 (29)
- Genus Nylopagurus A. Milne-Edwards & Bouvier, 1893 accepted as Pylopagurus A. Milne-Edwards & Bouvier, 1893
- Genus Nympagurus Boone, 1932 accepted as Pagurus Fabricius, 1775
- Genus Orbispagurus De Angeli & Caporiondo, 2017 †
- Genus Orhomalus Étallon, 1861 †
- Genus Orthopaguropsis Serène, 1957 accepted as Paguritta Melin, 1939
- Genus Orthopagurus Stevens, 1927 (1)
- Genus Ostraconotus A. Milne-Edwards, 1880 (1)
- Genus Pagurellus Lemaitre, Felder & Poupin, 2017 (1)
- Genus Paguridium Forest, 1961 (1)
- Genus Pagurina Lemaitre, Felder & Poupin, 2017 (1)
- Genus Paguriscus Lemaitre, Felder & Poupin, 2017 (1)
- Genus Paguritta Melin, 1939 (7)
- Genus Pagurixus Melin, 1939 (42)
- Genus Pagurodes Henderson, 1888 (1)
- Genus Pagurodofleinia Asakura, 2005 (1)
- Genus Pagurojacquesia de Saint Laurent & McLaughlin in Forest, de Saint Laurent, McLaughlin & Lemaitre, 2000 (1)
- Genus Paguruncio Lemaitre, Felder & Poupin, 2017 (1)
- Genus Pagurus Fabricius, 1775 (180)
- Genus Palaeopagurus Van Straelen, 1925 †
- Genus Paracapsulapagurus Hyžný, Fraaije, Martin, Perrier & Sarr, 2016 †
- Genus Parapaguristes Bishop, 1986 † accepted as Dakoticancer Rathbun, 1917 †
- Genus Parapagurodes McLaughlin & Haig, 1973 (2)
- Genus Patagurus Anker & Paulay, 2013 (1)
- Genus Phimochirus McLaughlin, 1981 (10)
- Genus Phylopagurus A. Milne-Edwards & Bouvier, 1893 accepted as Pylopagurus A. Milne-Edwards & Bouvier, 1893
- Genus Planopagurus Wolff, 1960 accepted as Probeebei Boone, 1926
- Genus Pliopagurus Komai, 2013 (1)
- Genus Porcellanopagurus Filhol, 1885 (14)
- Genus Propagurus McLaughlin & de Saint Laurent, 1998 (5)
- Genus Protoniopagurus Lemaitre & McLaughlin, 1996 (1)
- Genus Protopagurus Fraaije, Robins, Van Bakel, Jagt & Bachmayer, 2019 †
- Genus Pseudopagurodes McLaughlin, 1997 (4)
- Genus Pteropagurus McLaughlin & Rahayu, 2006 (3)
- Genus Pumilopagurus McLaughlin & Rahayu, 2008 (1)
- Genus Pusillopagurus Lemaitre, Felder & Poupin, 2017 (1)
- Genus Pygmaeopagurus McLaughlin, 1986 (1)
- Genus Pylopaguridium McLaughlin & Lemaitre, 2001 (1)
- Genus Pylopaguropsis Alcock, 1905 (20)
- Genus Pylopagurus A. Milne-Edwards & Bouvier, 1893 (5)
- Genus Raripagurus Lemaitre & Felder, 2023 (1)
- Genus Rhodochirus McLaughlin, 1981 (2)
- Genus Scopaeopagurus McLaughlin & Hogarth, 1998 (1)
- Genus Solenopagurus de Saint Laurent, 1968 (2)
- Genus Solitariopagurus Türkay, 1986 (5)
- Genus Spathapagurus Lemaitre & Felder, 2011 (3)
- Genus Spiropagurus Stimpson, 1858 (7)
- Genus Tarrasopagurus McLaughlin, 1997 (1)
- Genus Tomopaguroides Balss, 1912 (1)
- Genus Tomopaguropsis Alcock, 1905 (6)
- Genus Tomopagurus A. Milne-Edwards & Bouvier, 1893 (8)
- Genus Trichopagurus de Saint Laurent, 1968 (5)
- Genus Turleania McLaughlin, 1997 (9)
- Genus Viapagurus Ferratges & Zamora in García-Penas, Ferratges, Moreno-Bedmar, Bover-Arnal, Gasca, Aurell & Zamora, 2023 †
- Genus Vounopagurus Komai, Rahayu & Fujita, 2021 (1)
- 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 (7 883)
- 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