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)
- Superfamily Pinnotheroidea De Haan, 1833 (311)
- Family Parapinnixidae Števčić, 2005 (17)
- Family Pinnotheridae De Haan, 1833 (292)
- Subfamily Pinnixinae Števčić, 2005 (82)
- Subfamily Pinnixulalinae Palacios Theil, Cuesta & Felder, 2016 (4)
- Subfamily Pinnotherinae De Haan, 1833 (204)
- Tribe Pinnotherini De Haan, 1833 accepted as Pinnotherinae De Haan, 1833
- Genus Abyssotheres Manning & Galil, 2000 (2)
- Genus Afropinnotheres Manning, 1993 (6)
- Genus Alain Manning, 1998 (2)
- Genus Alainotheres Manning, 1993 (1)
- Genus Amusiotheres Ng & Ho, 2016 (2)
- Genus Arcotheres Manning, 1993 (24)
- Genus Austinotheres Campos, 2002 (1)
- Genus Austrotheres Ahyong, 2018 (2)
- Genus Bonita Campos, 2009 (1)
- Genus Buergeres Ng & Manning, 2003 (4)
- Genus Calyptraeotheres Campos, 1990 (5)
- Genus Celotheres Ahyong & Ng, 2024 (1)
- Genus Clypeasterophilus Campos & Griffith, 1990 (4)
- Genus Cryptophrys Rathbun, 1894 accepted as Fabia Dana, 1851
- Genus Discorsotheres Ahyong, 2018 (4)
- Genus Dissodactylozoea Aikawa, 1933 accepted as Dissodactylus Smith, 1870
- Genus Dissodactylus Smith, 1870 (15)
- Genus Durckheimia De Man, 1889 (3)
- Genus Echinophilus Rathbun, 1900 accepted as Dissodactylus Smith, 1870
- Genus Enigmatheres Campos, 2009 (1)
- Species Enigmatheres canfieldi (Rathbun, 1918)
- Genus Epulotheres Manning, 1993 accepted as Zaops Rathbun, 1900
- Genus Ernestotheres Manning, 1993 (1)
- Genus Fabia Dana, 1851 (10)
- Genus Gemmotheres Campos, 1996 (1)
- Genus Holotheres Ng & Manning, 2003 (5)
- Genus Holothuriophilus Nauck, 1880 (2)
- Genus Hospitotheres Manning, 1993 (1)
- Genus Juxtafabia Campos, 1993 (1)
- Genus Latatheres Ahyong, 2018 (2)
- Genus Limotheres Holthuis, 1975 (1)
- Genus Magnotheres Ng & Ahyong, 2022 (1)
- Genus Mesotheres Ng, Ahyong & Campos, 2019 (4)
- Genus Nannotheres Manning & Felder, 1996 (1)
- Genus Nepinnotheres Manning, 1993 (20)
- Genus Opisthopus Rathbun, 1894 (1)
- Genus Orthotheres Sakai, 1969 (3)
- Genus Ostracotheres H. Milne Edwards, 1853 (3)
- Genus Pharkidodes Feldmann, Schweitzer, Casadío & Griffin, 2011 †
- Genus Pinnaxodes Heller, 1865 (7)
- Genus Pinnothera Bosc, 1801 accepted as Pinnotheres Bosc, 1801
- Genus Pinnotheres Bosc, 1801 (28)
- Genus Pinnotheropsis Kubo, 1939 accepted as Durckheimia De Man, 1889
- Genus Pinnozoea Aikawa, 1933 accepted as Pinnotheres Bosc, 1801
- Genus Plenotheres Ng & Ahyong, 2022 (1)
- Genus Raphonotus Rathbun, 1897 accepted as Fabia Dana, 1851
- Genus Raymondia Campos, 2002 accepted as Raytheres Campos, 2004
- Genus Raytheres Campos, 2004 (1)
- Genus Serenotheres Ahyong & Ng, 2005 (2)
- Genus Sindheres Kazmi & Manning, 2003 (1)
- Genus Solenotheres Ng & Ngo, 2010 (1)
- Genus Tacitotheres Ng, Ahyong & Campos, 2019 (3)
- Genus Trichobezoares Ng, 2018 (2)
- Genus Tridacnatheres Ahyong & Ng, 2005 (1)
- Genus Tumidotheres Campos, 1989 (4)
- Genus Tunicotheres Campos, 1996 (1)
- Genus Viapinnixa Schweitzer & Feldmann, 2001 †
- Genus Viridotheres Manning, 1996 (11)
- Genus Visayeres Ahyong & Ng, 2007 (1)
- Genus Waldotheres Manning, 1993 (1)
- Genus Xanthasia White, 1846 (1)
- Genus Zaops Rathbun, 1900 (3)
- Genus Alarconia Glassell, 1938 (2)
- Genus Duerckheimia De Man, 1889 accepted as Durckheimia De Man, 1889
- Genus Ostracoteres H. Milne Edwards, 1853 accepted as Ostracotheres H. Milne Edwards, 1853
- Genus Pinnoteres Bosc, 1801 accepted as Pinnotheres Bosc, 1801
- Genus Pseudopinnixa Holmes, 1895 accepted as Parapinnixa Holmes, 1895
- Family Pinnotheridea De Haan, 1833 accepted as Pinnotheridae De Haan, 1833
- Family Tetriasidae Tsang & Naruse, 2023 (2)
- 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