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)
- Superfamily Cyclodorippoidea Ortmann, 1892 (110)
- Family Cyclodorippidae Ortmann, 1892 (54)
- Family Cyclodorippoidea incertae sedis †
- Family Cymonomidae Bouvier, 1898 (52)
- Genus Curupironomus Tavares, 1993 (1)
- Genus Cymonomoides Tavares, 1993 (3)
- Genus Cymonomus A. Milne-Edwards, 1880 (46)
- Genus Cymopolus A. Milne-Edwards, 1880 (1)
- Genus Elassopodus Tavares, 1993 (1)
- Genus Eonomus Nyborg, Garassino & Slak, 2017 †
- Genus Glaessneria Wright & Collins, 1972 † accepted as Glaessnerella Wright & Collins, 1975 †
- Family Phyllotymolinidae Tavares, 1998 (4)
- Family Quadratoplanidae Franţescu, 2014 †
- Section Dakoticancroida †
- Section Dromiacea (189)
- Section Etyoida †
- Section Eubrachyura (7 446)
- 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