Between brackets is the number of accepted extant species
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- Decapoda (17 683)
- Suborder Decapoda incertae sedis †
- Suborder Dendrobranchiata (533)
- Superfamily Penaeoidea Rafinesque, 1815 (427)
- Family Aciculopodidae Feldmann & Schweitzer, 2010 †
- Family Aegeridae Burkenroad, 1963 †
- Family Aristeidae Wood-Mason in Wood-Mason & Alcock, 1891 (26)
- Family Benthesicymidae Wood-Mason in Wood-Mason & Alcock, 1891 (39)
- Family Carpopenaeidae Garassino, 1994 †
- Family Penaeidae Rafinesque, 1815 (229)
- Family Penaeoidea incertae sedis †
- Family Sicyoniidae Ortmann, 1898 (52)
- Genus Eusicyonia Stebbing, 1914 accepted as Sicyonia H. Milne Edwards, 1830
- Species Eusicyonia aliaffinis Burkenroad, 1934 accepted as Sicyonia aliaffinis (Burkenroad, 1934)
- Species Eusicyonia disdorsalis Burkenroad, 1934 accepted as Sicyonia disdorsalis (Burkenroad, 1934)
- Species Eusicyonia disedwardi Burkenroad, 1934 accepted as Sicyonia disedwardsi (Burkenroad, 1934)
- Species Eusicyonia disparri Burkenroad, 1934 accepted as Sicyonia disparri (Burkenroad, 1934)
- Species Eusicyonia inflexa Kubo, 1949 accepted as Sicyonia inflexa (Kubo, 1949)
- Species Eusicyonia ingentis Burkenroad, 1938 accepted as Sicyonia ingentis (Burkenroad, 1938)
- Species Eusicyonia nebulosa Kubo, 1949 accepted as Sicyonia laevis Spence Bate, 1881
- Species Eusicyonia parri Burkenroad, 1934 accepted as Sicyonia parri (Burkenroad, 1934)
- Species Eusicyonia truncata Kubo, 1949 accepted as Sicyonia truncata (Kubo, 1949)
- Species Eusicyonia vitulans Kubo, 1949 accepted as Sicyonia vitulans (Kubo, 1949)
- Genus Ruvulus De Natale, 1850 accepted as Sicyonia H. Milne Edwards, 1830
- Genus Sicyonia H. Milne Edwards, 1830 (52)
- Genus Synhimantites Boeck, 1864 accepted as Sicyonia H. Milne Edwards, 1830
- Family Solenoceridae Wood-Mason in Wood-Mason & Alcock, 1891 (81)
- Superfamily Sergestoidea Dana, 1852 (106)
- Suborder Euzygida accepted as Stenopodidea
- Suborder Heterochelida
- Suborder Macrura
- Suborder Macrura reptantia
- Suborder Natantia
- Suborder Pleocyemata (17 150)
- Suborder Reptantia
- Suborder Trichelida