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)
- Family Anacalliacidae Manning & Felder, 1991 (3)
- Family Axiidae Huxley, 1879 (223)
- Family Callianassidae Dana, 1852 (141)
- Subfamily Anacalliacinae Manning & Felder, 1991 accepted as Anacalliacidae Manning & Felder, 1991
- Subfamily Bathycalliacinae Sakai & Türkay, 1999 accepted as Callianopsidae Manning & Felder, 1991
- Subfamily Callianassinae Dana, 1852 accepted as Callianassidae Dana, 1852
- Subfamily Callianopsinae Manning & Felder, 1991 accepted as Callianopsidae Manning & Felder, 1991
- Subfamily Calliapaguropinae Sakai, 1999 accepted as Callichiridae Manning & Felder, 1991
- Subfamily Callichirinae Manning & Felder, 1991 accepted as Callichiridae Manning & Felder, 1991
- Subfamily Cheraminae Manning & Felder, 1991 accepted as Callianassinae Dana, 1852
- Subfamily Ctenochelinae Manning & Felder, 1991 accepted as Ctenochelidae Manning & Felder, 1991
- Subfamily Eucalliacinae Manning & Felder, 1991 accepted as Eucalliacidae Manning & Felder, 1991
- Subfamily Gourretiinae Sakai, 1999 accepted as Gourretiidae Sakai, 1999
- Subfamily Lipkecallianassinae Sakai, 2005 accepted as Callianassidae Dana, 1852
- Subfamily Neocallianopsinae Sakai, 2011 accepted as Callianopsidae Manning & Felder, 1991
- Subfamily Paracalliacinae Sakai, 2005 accepted as Paracalliacidae Sakai, 2005
- Subfamily Pseudogourretiinae Sakai, 2005 accepted as Gourretiidae Sakai, 1999
- Subfamily Vulcanocalliacinae Dworschak & Cunha, 2007 accepted as Callianopsidae Manning & Felder, 1991
- Genus Aqaballianassa Poore, Dworschak, Robles, Mantelatto & Felder, 2019 (10)
- Genus Arenallianassa Poore, Dworschak, Robles, Mantelatto & Felder, 2019 (2)
- Genus Biffarius Manning & Felder, 1991 (4)
- Genus Brecanclawu Schweitzer & Feldmann, 2001 †
- Genus Calianassa Leach, 1814 accepted as Callianassa Leach, 1814
- Genus Callianassa Leach, 1814 (6)
- Genus Callianassidae incertae sedis (10)
- Genus Caviallianassa Poore, Dworschak, Robles, Mantelatto & Felder, 2019 (4)
- Genus Cheramoides Sakai, 2011 (4)
- Genus Cheramus Bate, 1888 (1)
- Genus Comoxianassa Schweitzer, Feldmann, Ćosović, Ross & Waugh, 2009 †
- Genus Coriollianassa Poore, Dworschak, Robles, Mantelatto & Felder, 2019 (6)
- Genus Cowichianassa Schweitzer, Feldmann, Ćosović, Ross & Waugh, 2009 †
- Genus Darryllianassa Poore, 2023 (1)
- Genus Eoglypturus Beschin, De Angeli, Checchi & Zarantonello, 2005 †
- Genus Filhollianassa Poore, Dworschak, Robles, Mantelatto & Felder, 2019 (2)
- Genus Fragillianassa Poore, Dworschak, Robles, Mantelatto & Felder, 2019 (3)
- Genus Gebios Risso, 1822 accepted as Gebios Bosc, 1813
- Genus Gebios Bosc, 1813 accepted as Gilvossius Manning & Felder, 1992
- Genus Gilvossius Manning & Felder, 1992 (9)
- Genus Jocullianassa Poore, Dworschak, Robles, Mantelatto & Felder, 2019 (5)
- Genus Lipkecallianassa Sakai, 2002 (1)
- Genus Melipal Schweitzer, Feldmann, Encinas & Suárez, 2006 †
- Genus Mesostylus Bronn & Roemer, 1852 †
- Genus Montagua Leach, 1814 accepted as Callianassa Leach, 1814
- Genus Necallianassa Heard & Manning, 1998 (4)
- Genus Neocallianassa Heard & Manning, 1998 accepted as Necallianassa Heard & Manning, 1998
- Genus Neotrypaea Manning & Felder, 1991 (16)
- Genus Nihonotrypaea Manning & Tamaki, 1998 accepted as Neotrypaea Manning & Felder, 1991
- Genus Notiax Manning & Felder, 1991 (2)
- Genus Paratrypaea Komai & Tachikawa, 2008 (8)
- Genus Pestarella Ngoc-Ho, 2003 accepted as Gilvossius Manning & Felder, 1992
- Genus Pleuronassa Ossó-Morales, Garassino, Vega & Artal, 2011 †
- Genus Poti Rodrigues & Manning, 1992 (1)
- Genus Praedatrypaea Poore, Dworschak, Robles, Mantelatto & Felder, 2019 (11)
- Genus Protocallianassa Beurlen, 1930 †
- Genus Psammionassa Schweitzer, Feldmann, Kues & Bridge, 2017 †
- Genus Pseudobiffarius Heard & Manning, 2000 accepted as Neotrypaea Manning & Felder, 1991
- Genus Pugnatrypaea Poore, Dworschak, Robles, Mantelatto & Felder, 2019 (5)
- Genus Rathbunassa Hyžný in Bermúdez, Gómez-Cruz, Hyžný, Moreno-Bedmar, Barragán, Sánchez & Vega, 2013 †
- Genus Rayllianassa Komai & Tachikawa, 2008 (8)
- Genus Rudisullianassa Poore, Dworschak, Robles, Mantelatto & Felder, 2019 (2)
- Species Rudisullianassa pandan Poore, 2023
- Species Rudisullianassa rudisulcus (Komai, Fujita & Maenosono, 2014)
- Genus Scallasis Bate, 1888 (7)
- Genus Semiranina Bachmayer, 1954 †
- Genus Spinicallianassa Poore, Dworschak, Robles, Mantelatto & Felder, 2019 (7)
- Genus Tastrypaea Poore, Dworschak, Robles, Mantelatto & Felder, 2019 (1)
- Genus Trypaea Dana, 1852 (1)
- Genus Vecticallichirus Quayle & Collins, 2012 †
- Genus Vegarthron Schweitzer & Feldmann, 2002 †
- Genus Zapalianassa Schweitzer, Feldmann & Casadío, 2022 †
- Family Callianideidae Kossman, 1880 (19)
- Family Callianopsidae Manning & Felder, 1991 (7)
- Family Callichiridae Manning & Felder, 1991 (101)
- Family Calocaridae Ortmann, 1891 accepted as Axiidae Huxley, 1879
- Family Calocarididae Ortmann, 1891 accepted as Axiidae Huxley, 1879
- Family Ctenochelidae Manning & Felder, 1991 (32)
- Family Eiconaxiidae Sakai & Ohta, 2005 accepted as Axiidae Huxley, 1879
- Family Eiconaxiopsididae Sakai, 2011 accepted as Axiidae Huxley, 1879
- Family Eucalliacidae Manning & Felder, 1991 (27)
- Family Gourretiidae Sakai, 1999 accepted as Ctenochelidae Manning & Felder, 1991
- Family Micheleidae Sakai, 1992 (35)
- Family Neoaxiidae Sakai, 2017 accepted as Axiidae Huxley, 1879
- Family Paracalliacidae Sakai, 2005 (1)
- Family Strahlaxiidae Poore, 1994 (11)
- Family Thomassiniidae de Saint Laurent, 1979 accepted as Callianideidae Kossman, 1880
- Family Tosacallianassidae Sakai, 2016 accepted as Ctenochelidae Manning & Felder, 1991
- Family Venipaguridae Collins, 2011 †
- Infraorder Brachyura (7 883)
- 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