Decapoda
Decapoda sunt ordo Crustaceorum intra classem Malacostracorum, quibus sunt multi greges familiares, praecipue Astacoidea, Parastacoidea, Brachyura, Nephropidae, Dendrobranchiata, et Caridea. Plurima decapoda sunt necrophagi. Zoologi aestimant ordinem paene 15 000 specierum in circa 2700 generum continere, quarum fere 3300 sunt species fossiles. Paene dimidium harum specierum sunt Brachyura, et plurimum quod restat sunt Caridea (circa 3000 specierum) et Anomura (Paguroidea, Porcellanidae, Galatheidae, Chirostylidae, et Kiwaidaes, coniunctim circa 2500 specierum). Antiquissimum decapodum fossile iam inventum est Palaeopalaemon, ex aevo Devoniano.

Anatomia 
Secundum nomen decapoda (ex Graeco δέκα 'decem' + πούς, ποδός, 'pes, pedis'), omnibus decapodibus sunt crura decem, quae formam habent quinque parium appendicum thoracicarum in ultimis quinque segmentis thoracicis sitis. Tria paria anterioria simul laborant partes oris, et ergo maxillipedes usitate appellantur; reliquia sunt pereiopoda. In multis autem decapodis, uno crurum pari sunt forcipes augmentatae; propter chelas, illa crura chelipedes appellari possunt. Quodque par aliarum appendicum in abdomine pleopoda biramosa ferre potest, quorum ultima sunt partes flabelli caudalis (una cum telsone) et ergo appellantur uropoda.

Taxinomia 
Dependet classificatio intra ordinem Decapoda de structura branchiarum et crurum, et de modo quo larvae crescunt, quibus pro causis sunt duo subordines: Dendrobranchiata et Pleocyemata. Dendrobranchiata in Dendrobranchiatis consistunt, quorum plurimi vulgo dubieque appellantur "caridea," sicut "carideum album," rite Litopenaeus setiferus. Pleocyemata residuos comprehendunt greges, praecipue Caridea vera. Greges qui usitate ambulant, contra natare (Pleocyemata, Stenopodideis et Carideis exclusis), cladum componunt, Reptantia appellatum.
 
Haec classificatio ad gradum superfamiliarum investigationes De Grave et al. sequitur.

Ordo Decapoda Latreille, 1802
 Subordo Dendrobranchiata Bate, 1888
 Penaeoidea Rafinesque, 1815
 Sergestoidea Dana, 1852
 Subordo Pleocyemata Burkenroad, 1963
 Infraordo Stenopodidea Bate, 1888
 Infraordo Caridea Dana, 1852
 Procaridoidea Chace & Manning, 1972
 Galatheacaridoidea Vereshchaka, 1997
 Pasiphaeoidea Dana, 1852
 Oplophoroidea Dana, 1852
 Atyoidea De Haan, 1849
 Bresilioidea Calman, 1896
 Nematocarcinoidea Smith, 1884
 Psalidopodoidea Wood-Mason, 1874
 Stylodactyloidea Bate, 1888
 Campylonotoidea Sollaud, 1913
 Palaemonoidea Rafinesque, 1815
 Alpheoidea Rafinesque, 1815
 Processoidea Ortmann, 1896
 Pandaloidea Haworth, 1825
 Physetocaridoidea Chace, 1940
 Crangonoidea Haworth, 1825
 Infraordo Astacidea Latreille, 1802
 Enoplometopoidea de Saint Laurent, 1988
 Nephropoidea Dana, 1852
 Astacoidea Latreille, 1802
Cambaridae
Procambarus
 Parastacoidea Huxley, 1879
 Infraordo Glypheidea Winckler, 1882
 Glypheoidea Winckler, 1882
 Infraordo Axiidea de Saint Laurent, 1979b
 Infraordo Gebiidea de Saint Laurent, 1979
 Infraordo Achelata Scholtz & Richter, 1995
 Infraordo Polychelida Scholtz & Richter, 1995
 Infraordo Anomura MacLeay, 1838
 Aegloidea Dana, 1852
 Galatheoidea Samouelle, 1819
 Hippoidea Latreille, 1825a
 Kiwaoidea Macpherson, Jones & Segonzac, 2005
 Lithodoidea Samouelle, 1819
 Lomisoidea Bouvier, 1895
 Paguroidea Latreille, 1802
 Infraordo Brachyura Linnaeus, 1758
 Sectio Dromiacea De Haan, 1833
 Dromioidea De Haan, 1833
 Homolodromioidea Alcock, 1900
 Homoloidea De Haan, 1839
 Sectio Raninoida De Haan, 1839
 Sectio Cyclodorippoida Ortmann, 1892
 Sectio Eubrachyura de Saint Laurent, 1980
 Subsectio Heterotremata Guinot, 1977
 Aethroidea Dana, 1851
 Bellioidea Dana, 1852
 Bythograeoidea Williams, 1980
 Calappoidea De Haan, 1833
 Cancroidea Latreille, 1802
 Carpilioidea Ortmann, 1893
 Cheiragonoidea Ortmann, 1893
 Corystoidea Samouelle, 1819
 Dairoidea Serène, 1965
 Dorippoidea MacLeay, 1838
 Eriphioidea MacLeay, 1838
 Gecarcinucoidea Rathbun, 1904
 Goneplacoidea MacLeay, 1838
 Hexapodoidea Miers, 1886
 Leucosioidea Samouelle, 1819
 Majoidea Samouelle, 1819
 Orithyioidea Dana, 1852c
 Palicoidea Bouvier, 1898
 Parthenopoidea MacLeay,
 Pilumnoidea Samouelle, 1819
 Portunoidea Rafinesque, 1815
 Potamoidea Ortmann, 1896
 Pseudothelphusoidea Ortmann, 1893
 Pseudozioidea Alcock, 1898
 Retroplumoidea Gill, 1894
 Trapezioidea Miers, 1886
 Trichodactyloidea H. Milne-Edwards, 1853
 Xanthoidea MacLeay, 1838
 Subsectio Thoracotremata Guinot, 1977
 Cryptochiroidea Paul'son, 1875
 Grapsoidea MacLeay, 1838
 Ocypodoidea Rafinesque, 1815
 Pinnotheroidea De Haan, 1833

Notae

Bibliographia 
 Sammy De Grave et al., "A classification of living and fossil genera of decapod crustaceans" in Raffles Bulletin of Zoology suppl. 21 (2009) pp. 1–109

 Aristaeopsis edwardsiana
 Caridina multidentata
 Halocaridina
 Metanephrops japonicus
 Ozius truncatus
 Panulirus japonicus
 Parribacus

Nexus externi 

 Decapod Crustacea "Arbor Vitae," pagina apud Natural History Museum of Los Angeles County

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Taxa Latreille
Taxa 1802
Ordines animalium