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)
- Section Homoloida (91)
- Section Podotremata accepted as Brachyura
- Section Raninoida (47)
- Subsection Gymnopleura accepted as Raninidae De Haan, 1839
- Superfamily Necrocarcinoidea Förster, 1968 †
- Family Camarocarcinidae Feldmann, Li & Schweitzer, 2007 †
- Family Cenomanocarcinidae Guinot, Vega & Van Bakel, 2008 †
- Family Juglocarcinidae Garvie, Collins & Mellish, 2017 † accepted as Orithopsidae Schweitzer, Feldmann, Fam, Hessin, Hetrick, Nyborg & Ross, 2003 †
- Family Moravocarcinidae Van Bakel, Fraaije, Jagt & Skupien, 2020 †
- Family Necrocarcinidae Förster, 1968 †
- Family Orithopsidae Schweitzer, Feldmann, Fam, Hessin, Hetrick, Nyborg & Ross, 2003 †
- Genus Aetocarcinus Schweitzer, Feldmann, Rader & Franţescu, 2016 †
- Genus Anoplocarcinus Schweitzer, Feldmann, Karasawa, Luque & Vega, 2019 †
- Genus Bellcarcinus Luque, 2014 †
- Genus Cherpiocarcinus Marangon & De Angeli, 1997 †
- Genus Chronocancer Santana, Tavares, Martins, Pereira Melo & Pinheiro, 2022 †
- Genus Chronocancer Santana, Tavares, Martins, Pereira Melo & Pinheiro, 2023 † accepted as Chronocancer Santana, Tavares, Martins, Pereira Melo & Pinheiro, 2022 †
- Genus Colombicarcinus Karasawa, Schweitzer, Feldmann & Luque, 2014 †
- Genus Cristella Collins & Rasmussen, 1992 †
- Genus Exucarcinus Prado & Luque in Prado, Luque, Barreto & Palmer, 2018 †
- Genus Lissopsis Fritsch in Fritsch & Kafka, 1887 † accepted as Paradoxilissopsa Schweitzer, Dworschak & Martin, 2011 †
- Genus Marycarcinus Schweitzer, Feldmann, Fam, Hessin, Hetrick, Nyborg & Ross, 2003 †
- Genus Orithopsis Carter, 1872 †
- Genus Paradoxicarcinus Schweitzer, Feldmann, Fam, Hessin, Hetrick, Nyborg & Ross, 2003 †
- Genus Paradoxilissopsa Schweitzer, Dworschak & Martin, 2011 †
- Genus Planocarcinus Luque, Feldmann, Schweitzer, Jaramillo & Cameron, 2012 †
- Genus Shazella Collins & Williams, 2004 †
- Genus Silvacarcinus Collins & Smith, 1993 †
- Genus Texicancer Franţescu, Feldmann & Schweitzer, 2016 †
- Species Texicancer renfroae (Stenzel, 1945) †
- Family Paranecrocarcinidae Fraaije, Van Bakel & Jagt & Artal, 2008 †
- Superfamily Palaeocorystoidea Lőrenthey in Lőrenthey & Beurlen, 1929 †
- Superfamily Raninoidea De Haan, 1839 (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