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)
- Superfamily Penaeoidea Rafinesque, 1815 (427)
- 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