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)
- Subsection Heterotremata (6 086)
- Superfamily Aethroidea Dana, 1851 (37)
- Superfamily Bellioidea Dana, 1852 (7)
- Superfamily Bythograeoidea Williams, 1980 (16)
- Superfamily Calappoidea De Haan, 1833 (103)
- Superfamily Cancroidea Latreille, 1802 (37)
- Superfamily Carpilioidea Ortmann, 1893 (3)
- Superfamily Cheiragonoidea Ortmann, 1893 (3)
- Superfamily Componocancroidea Feldmann, Schweitzer & Green, 2008 †
- Superfamily Corystoidea Samouelle, 1819 (9)
- Superfamily Dairoidea Serène, 1965 (4)
- Superfamily Dorippoidea MacLeay, 1838 (100)
- Superfamily Eriphioidea MacLeay, 1838 (67)
- Superfamily Gecarcinucoidea Rathbun, 1904 (458)
- Family Gecarcinucidae Rathbun, 1904 (458)
- Genus Abortelphusa Mitra, 2020 (1)
- Genus Adeleana Bott, 1969 (3)
- Genus Arachnothelphusa Ng, 1991 (8)
- Genus Aradhya Pati, Bajantri & Hedge, 2023 (1)
- Genus Archipelothelphusa Bott, 1969 accepted as Sundathelphusa Bott, 1969
- Genus Arcithelphusa Pati & Suda Devi, 2015 (2)
- Genus Austrothelphusa Bott, 1969 (9)
- Genus Bakousa Ng, 1995 (3)
- Genus Balssiathelphusa Bott, 1969 (4)
- Genus Baratha Bahir & Yeo, 2007 (2)
- Genus Barusa Pati & Yeo, 2022 (5)
- Genus Barytelphusa Alcock, 1909 (2)
- Genus Barytelpusa Alcock, 1909 accepted as Barytelphusa Alcock, 1909
- Genus Borneosa Ng & Grinang, 2022 (8)
- Species Borneosa aspera (Ng & Stuebing, 1989)
- Species Borneosa bario Ng & Grinang, 2022
- Species Borneosa brachyphallus (Ng, 2015)
- Species Borneosa kapit Ng & Grinang, 2022
- Species Borneosa niah Ng & Grinang, 2022
- Species Borneosa sarawakensis Ng & Grinang, 2022
- Species Borneosa serrata Ng & Grinang, 2022
- Species Borneosa tenebrosa Holthuis, 1979
- Genus Ceylonthelphusa Bott, 1969 (18)
- Genus Chulathelphusa Naiyanetr, 1994 accepted as Mekhongthelphusa Naiyanetr, 1994
- Genus Clinothelphusa Ng & Tay, 2001 (1)
- Genus Coccusa Tan & Ng, 1998 (2)
- Genus Currothelphusa Ng, 1990 (1)
- Genus Cylindrotelphusa Alcock, 1909 (4)
- Genus Esanthelphusa Naiyanetr, 1994 (9)
- Genus Gecarcinucus H. Milne Edwards, 1844 (2)
- Genus Geelvinkia Bott, 1974 (4)
- Genus Geithusa Ng, 1989 (2)
- Genus Ghatiana Pati & Sharma, 2014 (13)
- Genus Globitelphusa Alcock, 1909 (4)
- Genus Gubernatoriana Bott, 1970 (4)
- Genus Guinothusa Yeo & Ng, 2010 (3)
- Genus Heterothelphusa Ng & Lim, 1986 (2)
- Genus Holthuisana Bott, 1969 (12)
- Genus Inglethelphusa Bott, 1970 (1)
- Genus Irmengardia Bott, 1969 (4)
- Genus Kani Kumar, Raj & Ng, 2017 (1)
- Genus Karkata Pati, Rajesh, Raj, Sheeja, Biju Kumar & Sureshan, 2017 (2)
- Genus Lamella Bahir & Yeo, 2007 (1)
- Genus Lepidothelphusa Colosi, 1920 (7)
- Genus Liotelphusa Alcock, 1909 (5)
- Genus Mahatha Ng & Tay, 2001 (6)
- Genus Mainitia Bott, 1969 (1)
- Genus Maydelliathelphusa Bott, 1969 (6)
- Genus Mekhongthelphusa Naiyanetr, 1994 (5)
- Genus Migmathelphusa Chia & Ng, 2006 (1)
- Genus Nautilothelphusa Balss, 1933 (1)
- Genus Niasathelphusa Ng, 1991 (1)
- Genus Occulthusa Ng & Wowor, 2018 (1)
- Genus Oziotelphusa Müller, 1887 (19)
- Genus Palawanthelphusa Bott, 1969 accepted as Parathelphusa H. Milne Edwards, 1853
- Genus Para-(Globi-)thelphusa Alcock, 1909 accepted as Parathelphusa (Globithelphusa) Alcock, 1909
- Genus Para-Bary-thelphusa Alcock, 1909 accepted as Parathelphusa (Barythelphusa) Alcock, 1909
- Genus Para-Lio-thelphusa Alcock, 1909 accepted as Parathelphusa (Liothelphusa) Alcock, 1909
- Genus Para-Peri-thelphusa De Man, 1899 accepted as Parathelphusa (Perithelphusa) De Man, 1899
- Genus Paratelphusa H. Milne Edwards, 1853 accepted as Parathelphusa H. Milne Edwards, 1853
- Genus Parathelphusa H. Milne Edwards, 1853 (49)
- Genus Parathephusa H. Milne Edwards, 1853 accepted as Parathelphusa H. Milne Edwards, 1853
- Genus Pastilla Ng & Tay, 2001 (1)
- Genus Pavizham Raj, Kumar & Ng, 2022 (1)
- Genus Perbrinckia Bott, 1969 (14)
- Genus Perithelphusa De Man, 1899 (4)
- Genus Phricotelphusa Alcock, 1909 (13)
- Genus Pilarta Bahir & Yeo, 2007 (3)
- Genus Rajathelphusa Raj, Kumar & Ng, 2021 (3)
- Genus Rouxana Bott, 1969 (8)
- Genus Sahyadriana Pati & Thackeray, 2018 (13)
- Genus Salangathelphusa Bott, 1968 (3)
- Genus Sartoriana Bott, 1969 (2)
- Genus Sayamia Naiyanetr, 1994 (5)
- Genus Sendleria Bott, 1969 (4)
- Genus Siamthelphusa Bott, 1968 (9)
- Genus Snaha Bahir & Yeo, 2007 (2)
- Genus Sodhiana Yeo & Ng, 2012 (4)
- Genus Somanniathelphusa Bott, 1968 (33)
- Genus Spiralothelphusa Bott, 1968 (7)
- Genus Stygothelphusa Ng, 1989 (4)
- Genus Sundathelphusa Bott, 1969 (41)
- Genus Syntripsa Chia & Ng, 2006 (2)
- Genus Terrathelphusa Ng, 1989 (11)
- Genus Thaksinthelphusa Ng & Naiyanetr, 1993 (1)
- Genus Thelphusula Bott, 1969 (12)
- Genus Torhusa Ng, 1997 (1)
- Genus Travancoriana Bott, 1969 (6)
- Genus Vanni Bahir & Yeo, 2007 (7)
- Genus Vela Bahir & Yeo, 2007 (4)
- Family Parathelphusidae Alcock, 1910 accepted as Gecarcinucidae Rathbun, 1904
- Superfamily Goneplacoidea MacLeay, 1838 (238)
- Superfamily Heterotremata incertae sedis †
- Superfamily Hexapodoidea Miers, 1886 (44)
- Superfamily Hymenosomatoidea MacLeay, 1838 (138)
- Superfamily Leucosioidea Samouelle, 1819 (516)
- Superfamily Majoidea Samouelle, 1819 (968)
- Superfamily Montezumelloidea Ossó & Domínguez, 2021 †
- Superfamily Orithyioidea Dana, 1852 (1)
- Superfamily Palicoidea Bouvier, 1898 (69)
- Superfamily Parthenopoidea MacLeay, 1838 (148)
- Superfamily Pilumnoidea Samouelle, 1819 (440)
- Superfamily Portunoidea Rafinesque, 1815 (476)
- Superfamily Potamoidea Ortmann, 1896 (956)
- Superfamily Pseudocarcinoidea Ng & Davie, 2020 (1)
- Superfamily Pseudothelphusoidea Ortmann, 1893 (301)
- Superfamily Pseudozioidea Alcock, 1898 (27)
- Superfamily Retroplumoidea Gill, 1894 (10)
- Superfamily Thioidea Dana, 1852 accepted as Thiidae Dana, 1852
- Superfamily Trapezioidea Miers, 1886 (58)
- Superfamily Trichodactyloidea H. Milne Edwards, 1853 (52)
- Superfamily Trichopeltarioidea Tavares & Cleva, 2010 (29)
- Superfamily Xanthoidea MacLeay, 1838 (770)
- Subsection Thoracotremata (1 360)
- 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