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)
- 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)
- Genus Ahazianassa Karasawa, Kishimoto, Ohara & Ando, 2019 †
- Genus Cretagourretia Ossó, Charbonnier, Hyžný, Van Bakel & Devillez in Ossó, Charbonnier, Hyžný, Van Bakel, Devillez, Bover-Arnal & Moreno Bedmar, 2024 †
- Genus Ctenocheles Kishinouye, 1926 (8)
- Species Ctenocheles anderseni Collins & Jakobsen, 2003 †
- Species Ctenocheles bakeri (Glaessner, 1947) †
- Species Ctenocheles balssi Kishinouye, 1926
- Species Ctenocheles burlesonensis (Stenzel, 1935) †
- Species Ctenocheles chattiensis Polkowsky, 2004 † accepted as Ctenocheles rupeliensis (Beurlen, 1939) †
- Species Ctenocheles collini Ward, 1945
- Species Ctenocheles compressus Jenkins, 1972 †
- Species Ctenocheles cookei (Rathbun, 1935) †
- Species Ctenocheles cultellus (Rathbun, 1935) †
- Species Ctenocheles dentatus (Rathbun, 1935) †
- Species Ctenocheles fabianii Beschin, Busulini & Tessier, 2013 †
- Species Ctenocheles falciformis Collins & Todd in Todd & Collins, 2005 †
- Species Ctenocheles fragilis Jenkins, 1972 †
- Species Ctenocheles fritschi Hyžný, Veselská & Dvorák, 2014 †
- Species Ctenocheles hokoensis Schweitzer & Feldmann, 2001 †
- Species Ctenocheles holthuisi Rodrigues, 1978
- Species Ctenocheles inaequidens (Pelseneer, 1886) †
- Species Ctenocheles leviceps Rabalais, 1979
- Species Ctenocheles madagascariensis Secrétan, 1964 †
- Species Ctenocheles maorianus Powell, 1949
- Species Ctenocheles notialis Feldmann, Schweitzer & Encinas, 2010 †
- Species Ctenocheles ornatus Beschin, De Angeli, Checchi & Zarantonello, 2005 †
- Species Ctenocheles pectiniformis (Böhm, 1891) †
- Species Ctenocheles plantei (Burukovsky, 2005)
- Species Ctenocheles possagnoensis Busulini & Beschin, 2009 †
- Species Ctenocheles rupeliensis (Beurlen, 1939) †
- Species Ctenocheles sclephrops Jenkins, 1972 †
- Species Ctenocheles secretanae Schweitzer & Feldmann, 2002 †
- Species Ctenocheles sereaensis Beschin, De Angeli & Zorzin, 2009 †
- Species Ctenocheles serrifrons Le Loeuff & Intes, 1974
- Species Ctenocheles sinicus Kou, Poore & Li, 2024
- Species Ctenocheles sujakui Imaizumi, 1958 †
- Species Ctenocheles valdellae (Fabiani, 1908) †
- Species Ctenocheles victor Glaessner, 1947 †
- Genus Ctenocheloides Anker, 2010 (3)
- Genus Dawsonius Manning & Felder, 1991 (1)
- Genus Gourretia de Saint Laurent, 1973 (8)
- Genus Ischnodactylus Pelseneer, 1886 † accepted as Ctenocheles Kishinouye, 1926
- Genus Kiictenocheloides Sakai, 2013 (1)
- Genus Laurentgourretia Sakai, 2004 (1)
- Genus Paragourretia Sakai, 2004 (10)
- 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