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)
- Infraorder Callianassidea accepted as Axiidea
- Infraorder Caridea (3 919)
- Section Amphionidea accepted as Caridea
- Section Penaeidea accepted as Dendrobranchiata
- Superfamily Alpheoidea Rafinesque, 1815 (1 229)
- Superfamily Atyoidea De Haan, 1849 (560)
- Superfamily Bresilioidea Calman, 1896 (70)
- Superfamily Campylonotoidea Sollaud, 1913 (17)
- Superfamily Caridea incertae sedis †
- Superfamily Crangonoidea Haworth, 1825 (329)
- Superfamily Nematocarcinoidea Smith, 1884 (80)
- Superfamily Oplophoroidea Dana, 1852 (71)
- Superfamily Palaemonoidea Rafinesque, 1815 (1 149)
- Superfamily Pandaloidea Haworth, 1825 (203)
- Superfamily Pasiphaeoidea Dana, 1852 (104)
- Superfamily Physetocaridoidea Chace, 1940 accepted as Pandaloidea Haworth, 1825
- Superfamily Pleopteryxoidea Schweigert & Garassino, 2006 †
- Superfamily Processoidea Ortmann, 1896 (70)
- Superfamily Psalidopodoidea Wood-Mason (3)
- Superfamily Stylodactyloidea Spence Bate, 1888 (34)
- Family Stylodactylidae Spence Bate, 1888 (34)
- Genus Bathystylodactylus Hanamura & Takeda, 1996 (3)
- Genus Neostylodactylus Hayashi & Miyake, 1968 (5)
- Genus Parastylodactylus Figueira, 1971 (9)
- Genus Stylodactyloides Cleva, 1990 (1)
- Genus Stylodactylus A. Milne-Edwards, 1881 (16)
- Species Stylodactylus amarynthis De Man, 1902 accepted as Neostylodactylus amarynthis (De Man, 1902)
- Species Stylodactylus bathyalis Cleva, 1994 accepted as Bathystylodactylus bathyalis (Cleva, 1994)
- Species Stylodactylus bimaxillaris Spence Bate, 1888 accepted as Parastylodactylus bimaxillaris (Spence Bate, 1888)
- Species Stylodactylus brevidactylus Cleva, 1990 accepted as Stylodactylus multidentatus multidentatus Kubo, 1942
- Species Stylodactylus brucei Cleva, 1994
- Species Stylodactylus discissipes Spence Bate, 1888
- Species Stylodactylus gracilis Cleva, 2008
- Species Stylodactylus gracilis Cleva, 2008 accepted as Stylodactylus gracilis Cleva, 2008
- Species Stylodactylus investigatoris Kemp, 1925 accepted as Neostylodactylus investigatoris (Kemp, 1925)
- Species Stylodactylus kauaiensis Figueira, 1971
- Species Stylodactylus laurentae Cleva, 1990
- Species Stylodactylus libratus Chace, 1983
- Species Stylodactylus licinus Chace, 1983
- Species Stylodactylus macropus Chace, 1983
- Species Stylodactylus major Hayashi & Miyake, 1968
- Species Stylodactylus multidentatus Kubo, 1942
- Subspecies Stylodactylus multidentatus multidentatus Kubo, 1942
- Subspecies Stylodactylus multidentatus robustus Cleva, 1990
- Species Stylodactylus orientalis Spence Bate, 1888 accepted as Stylodactylus discissipes Spence Bate, 1888
- Species Stylodactylus profundus Cleva, 1990
- Species Stylodactylus pubescens Burukovsky, 1990
- Species Stylodactylus rectirostris A. Milne-Edwards, 1883
- Species Stylodactylus serratus A. Milne-Edwards, 1881
- Species Stylodactylus Sibogae De Man, 1918 accepted as Neostylodactylus sibogae (De Man, 1918)
- Species Stylodactylus stebbingi Hayashi & Miyake, 1968
- Species Stylodactylus tokarensis Zarenkov, 1968
- Family Hectarthropidae Spence Bate, 1888 accepted as Processidae Ortmann, 1896
- Family Prionorhynchus Leach, 1830
- Genus Caricyphus Spence Bate, 1888
- Genus Rhomaleocaris Spence Bate, 1888
- Infraorder Gebiidea (252)
- Infraorder Glypheidea (2)
- Infraorder Palaeopalaeomonida †
- Infraorder Polychelida (38)
- Infraorder Procarididea (6)
- Infraorder Stenopodidea (100)
- Suborder Reptantia
- Suborder Trichelida