Between brackets is the number of accepted extant species
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Shows the number of accepted extant species within the taxon
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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)
- Family Aphanodactylidae Ahyong & Ng, 2009 (16)
- Genus Ankerius Ng, Rahayu & Shih, 2016 (2)
- Genus Aphanodactylus Tesch, 1918 accepted as Selwynia Borradaile, 1903
- Genus Gandoa Kammerer, 2006 (1)
- Genus Gustavus Ahyong & Ng, 2009 (2)
- Species Gustavus holthuisae Ng & Anker, 2024
- Species Gustavus mecognathus Ahyong & Ng, 2009
- Genus Lichtylus Naruse & Yoshida, 2018 (1)
- Genus Selwynia Borradaile, 1903 (7)
- Genus Takedactylus Naruse & Maenosono, 2012 (2)
- Genus Uruma Naruse, Fujita & Ng, 2009 (1)
- Genus Voeltzkowia Lenz, 1905 accepted as Gandoa Kammerer, 2006
- Superfamily Cryptochiroidea Paulson, 1875 (56)
- Superfamily Grapsoidea MacLeay, 1838 (645)
- Superfamily Ocypodoidea Rafinesque, 1815 (332)
- 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