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)
- Superfamily Dromiacea incertae sedis †
- Superfamily Dromioidea De Haan, 1833 (160)
- Superfamily Glaessneropsoidea Patrulius, 1959 †
- Superfamily Homolodromioidea Alcock, 1900 (29)
- Family Bucculentidae Schweitzer & Feldmann, 2009 †
- Family Goniodromitidae Beurlen, 1932 †
- Family Homolodromidae Alcock, 1900 accepted as Homolodromiidae Alcock, 1900
- Family Homolodromiidae Alcock, 1900 (29)
- Family Homolodromioidea incertae sedis †
- Family Jurellanidae Klompmaker & Robins in Robins & Klompmaker, 2019 †
- Genus Jurellana Schweitzer & Feldmann, 2010 †
- Genus Ovalopus Klompmaker & Robins in Robins & Klompmaker, 2019 †
- Family Longodromitidae Schweitzer & Feldmann, 2009 †
- Family Prosopidae von Meyer, 1860 †
- Family Tanidromitidae Schweitzer & Feldmann, 2008 †
- Superfamily Konidromitoidea Schweitzer & Feldmann, 2010 †
- 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