Between brackets is the number of accepted extant species
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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)
- Infraorder Brachyura (7 883)
- Infraorder Callianassidea accepted as Axiidea
- Infraorder Caridea (3 919)
- Section Amphionidea accepted as Caridea
- Section Penaeidea accepted as Dendrobranchiata
- Superfamily Alpheoidea Rafinesque, 1815 (1 229)
- Family Alpheidae Rafinesque, 1815 (822)
- Genus Acanthanas Anker, Poddoubtchenko & Jeng, 2006 (1)
- Genus Alberta Kazmi & Kazmi, 2010 accepted as Pseudathanas Bruce, 1983
- Genus Alphaeus Fabricus, 1798 accepted as Alpheus Fabricius, 1798
- Genus Alpheinus Borradaile, 1900 accepted as Synalpheus Spence Bate, 1888
- Genus Alpheoides Paulson, 1875 accepted as Alpheus Fabricius, 1798
- Genus Alpheopsis Coutière, 1897 (26)
- Genus Alpheus Fabricius, 1798 (344)
- Species Alpheus abumusa Dehghani, Sari & Naderloo, 2019
- Species Alpheus acanthomerus Ortmann, 1890 accepted as Alpheus edamensis De Man, 1888
- Species Alpheus aculeipes Coutière, 1905 accepted as Alpheus alcyone De Man, 1902
- Species Alpheus acutocarinatus De Man, 1909
- Species Alpheus acutofemoratus Dana, 1852
- Species Alpheus adamastor Coutière, 1908
- Species Alpheus aequalis Kingsley, 1878 accepted as Betaeus harfordi (Kingsley, 1878)
- Species Alpheus aequus Kim & Abele, 1988
- Species Alpheus affinis Guise, 1854 accepted as Alpheus macrocheles (Hailstone, 1835)
- Species Alpheus affinis Kingsley, 1878 accepted as Alpheus normanni Kingsley, 1878
- Species Alpheus africanus Balss, 1916
- Species Alpheus agilis Anker, Hurt & Knowlton, 2009
- Species Alpheus aglaopheniae Borradaile, 1900 accepted as Metalpheus paragracilis (Coutière, 1897)
- Species Alpheus agrogon Ramos, 1997
- Species Alpheus alaincrosnieri Anker, 2020
- Species Alpheus albatrossae (AH Banner, 1953)
- Species Alpheus albertei Kazmi & Kazmi, 1979
- Species Alpheus alcyone De Man, 1902
- Species Alpheus alope White, 1847 accepted as Alpheus strenuus strenuus Dana, 1852
- Species Alpheus alpheopsides Coutière, 1905
- Species Alpheus amarillo Anker, 2012
- Species Alpheus amblyonyx Chace, 1972
- Species Alpheus amboinae Zehntner, 1894 accepted as Synalpheus stimpsonii (De Man, 1888)
- Species Alpheus amethystea Risso, 1827 accepted as Periclimenes amethysteus (Risso, 1827)
- Species Alpheus amirantei Coutière, 1908
- Species Alpheus amphitrite White, 1847
- Species Alpheus anchistus De Man, 1920
- Species Alpheus andronyx Christoffersen, 1998 accepted as Alpheus heterochaelis Say, 1818
- Species Alpheus angulatus McClure, 1995 accepted as Alpheus angulosus McClure, 2002
- Species Alpheus angulosus McClure, 2002
- Species Alpheus angustilineatus Nomura & Anker, 2005
- Species Alpheus ankeri Dehghani, Sari & Naderloo, 2019
- Species Alpheus antepaenultimus Kim & Abele, 1988
- Species Alpheus architectus De Man, 1897
- Species Alpheus arenensis (Chace, 1937)
- Species Alpheus arenicolus Banner & Banner, 1983
- Species Alpheus arethusa De Man, 1909
- Species Alpheus armatus Rathbun, 1901
- Species Alpheus armillatus H. Milne Edwards, 1837
- Species Alpheus arnoa Banner, 1957
- Species Alpheus ascensionis Ortmann, 1893 accepted as Alpheus paracrinitus Miers, 1881
- Species Alpheus astrinx Banner & Banner, 1982
- Species Alpheus audouini Coutière, 1905 accepted as Alpheus edwardsii (Audouin, 1826)
- Species Alpheus australiensis Banner & Banner, 1982
- Species Alpheus australosulcatus Banner & Banner, 1982
- Species Alpheus avarus Fabricius, 1798
- Species Alpheus baccheti Anker, 2010
- Species Alpheus baculifer Coutière, 1908 accepted as Alpheus idiocheles Coutière, 1905
- Species Alpheus bahamensis Rankin, 1898
- Species Alpheus balaenodigitus Banner & Banner, 1982
- Species Alpheus bannerorum Bruce, 1987
- Species Alpheus barbadensis (Schmitt, 1924)
- Species Alpheus barbara Lockington, 1878 accepted as Alpheus clamator Lockington, 1877
- Species Alpheus barbatus Coutière, 1897
- Species Alpheus batesi Banner & Banner, 1964
- Species Alpheus beanii Verrill, 1922 accepted as Alpheus packardii Kingsley, 1880
- Species Alpheus Belli Coutière, 1898 accepted as Alpheus malleator Dana, 1852
- Species Alpheus bellimanus Lockington, 1877
- Species Alpheus bellulus Miya & Miyake, 1969
- Species Alpheus bermudensis Spence Bate, 1888 accepted as Alpheus packardii Kingsley, 1880
- Species Alpheus berumeni Anker, 2024
- Species Alpheus bicostatus De Man, 1908
- Species Alpheus bidens (Olivier, 1811)
- Species Alpheus bisincisus De Haan, 1849
- Species Alpheus bis-incisus De Haan, 1849 accepted as Alpheus bisincisus De Haan, 1849
- Species Alpheus bispinosus Streets, 1871
- Species Alpheus biunguiculatus Stimpson, 1860 accepted as Synalpheus biunguiculatus (Stimpson, 1860)
- Species Alpheus blachei Crosnier & Forest, 1965
- Species Alpheus bouvieri A. Milne-Edwards, 1878
- Variety Alpheus bouvieri var. bastardi Coutière, 1898 accepted as Alpheus leviusculus Dana, 1852
- Variety Alpheus bouvieri var. chilensis Coutière in Lenz, 1902 accepted as Alpheus chilensis Coutière in Lenz, 1902
- Variety Alpheus bouvieri var. hululensis Coutière, 1905 accepted as Alpheus hululensis Coutière, 1905
- Species Alpheus brachymerus (AH Banner, 1953)
- Species Alpheus bradypus Coutière, 1905
- Species Alpheus braschi Boone, 1935 accepted as Alpheus parvirostris Dana, 1852
- Species Alpheus brasileiro Anker, 2012
- Species Alpheus brevicristatus De Haan, 1844
- Species Alpheus brevipes Stimpson, 1860
- Species Alpheus brevirostris (Olivier, 1811)
- Species Alpheus brucei Banner & Banner, 1982
- Species Alpheus bucephaloides Nobili, 1905
- Species Alpheus bucephalus Coutière, 1905
- Species Alpheus buchanorum Banner & Banner, 1983
- Species Alpheus buckupi Almeida, Terossi, Araújo-Silva & Mantelatto, 2013
- Species Alpheus bullatus Barnard, 1955 accepted as Alpheus architectus De Man, 1897
- Species Alpheus bunburius Banner & Banner, 1982
- Species Alpheus burukovskyi Anker & Pachelle, 2015
- Species Alpheus caigeri Anker, 2024
- Species Alpheus californiensis Holmes, 1900
- Species Alpheus canaliculatus Banner & Banner, 1968
- Species Alpheus canalis Kim & Abele, 1988 accepted as Alpheus galapagensis Sivertsen, 1933
- Species Alpheus candei Guérin-Méneville, 1855
- Species Alpheus cangiopalus Marin & Thinh, 2024
- Species Alpheus caramote Risso, 1816 accepted as Penaeus kerathurus (Forskål, 1775)
- Species Alpheus carinatus De Man, 1888 accepted as Synalpheus carinatus (De Man, 1888)
- Species Alpheus carlae Anker, 2012
- Species Alpheus cedrici Anker & De Grave, 2012
- Species Alpheus chacei Carvacho, 1979
- Species Alpheus chamorro Banner, 1956
- Species Alpheus charon Heller, 1861 accepted as Synalpheus charon (Heller, 1861)
- Species Alpheus chilensis Coutière in Lenz, 1902
- Species Alpheus chiragricus H. Milne Edwards, 1837
- Species Alpheus christofferseni Anker, Hurt & Knowlton, 2007
- Species Alpheus clamator Lockington, 1877
- Species Alpheus cloudi AH Banner, 1956 accepted as Alpheus stanleyi Coutière, 1908
- Species Alpheus clypeatus Coutière, 1905
- Species Alpheus coetivensis Coutière, 1908
- Species Alpheus collumianus Stimpson, 1860
- Species Alpheus colombiensis Wicksten, 1988
- Species Alpheus comatularum Haswell, 1882 accepted as Synalpheus comatularum (Haswell, 1882)
- Species Alpheus compressus Banner & Banner, 1981
- Species Alpheus confusus Carvacho, 1989
- Species Alpheus consobrinus De Man, 1908 accepted as Alpheus bucephalus Coutière, 1905
- Species Alpheus coralvivo Santos, Terossi, Mantelatto, Torres & Almeida, 2024
- Species Alpheus coutierei De Man, 1909
- Species Alpheus crassimanus Heller, 1862 accepted as Alpheus lobidens De Haan, 1849
- Species Alpheus cremnus Banner & Banner, 1982 accepted as Alpheus strenuus cremnus Banner & Banner, 1982
- Species Alpheus crinitus Dana, 1852
- Species Alpheus cristatus Coutière, 1897
- Species Alpheus cristidigitus Spence Bate, 1888 accepted as Alpheus dentipes Guérin, 1832
- Species Alpheus cristulifrons Rathbun, 1900
- Species Alpheus crockeri (Armstrong, 1941)
- Species Alpheus cryptodentatus Christoffersen & Ramos, 1988 accepted as Alpheus galapagensis Sivertsen, 1933
- Species Alpheus cyanoteles Yeo & Ng, 1996
- Species Alpheus cylindricus Kingsley, 1878
- Species Alpheus cythereus Banner & Banner, 1966
- Species Alpheus danae Coutière, 1905 accepted as Alpheus malleodigitus (Spence Bate, 1888)
- Species Alpheus dasycheles Coutière, 1908
- Species Alpheus davaoensis Chace, 1988
- Species Alpheus dentipes Guérin, 1832
- Species Alpheus deuteropus Hilgendorf, 1879
- Species Alpheus diadema Dana, 1852
- Species Alpheus digitalis De Haan, 1844
- Species Alpheus dingabadi Anker, 2023
- Species Alpheus dispar Randall, 1840
- Species Alpheus dissodontonotus Stebbing, 1915 accepted as Alpheus bidens (Olivier, 1811)
- Species Alpheus distinctus Kim & Abele, 1988
- Species Alpheus distinguendus De Man, 1909 accepted as Alpheus digitalis De Haan, 1844
- Species Alpheus djeddensis Coutière, 1897
- Species Alpheus djiboutensis De Man, 1909
- Species Alpheus dolerus Banner, 1956
- Species Alpheus dolichodactylus Ortmann, 1890 accepted as Alpheus malabaricus (Fabricius, 1775)
- Species Alpheus doris White, 1847 accepted as Alpheus strenuus strenuus Dana, 1852
- Species Alpheus doto White, 1847 accepted as Alpheus socialis Heller, 1862
- Species Alpheus echiurophilus Anker, Komai & Marin, 2015
- Species Alpheus edamensis De Man, 1888
- Species Alpheus edwardsii (Audouin, 1826)
- Species Alpheus edwardsii H. Milne Edwards, 1837 accepted as Alpheus macrocheles (Hailstone, 1835)
- Species Alpheus ehlersii De Man, 1909
- Species Alpheus elegans Risso, 1816 accepted as Gnathophyllum elegans (Risso, 1816)
- Species Alpheus elongatus Risso, 1827 accepted as Hippolyte inermis Leach, 1816
- Species Alpheus emarginatus H. Milne Edwards, 1837 accepted as Betaeus emarginatus (H. Milne Edwards, 1837)
- Species Alpheus equidactylus Lockington, 1877 accepted as Alpheopsis equidactylus (Lockington, 1877)
- Species Alpheus estuariensis Christoffersen, 1984
- Species Alpheus euchiroides Nobili, 1906 accepted as Alpheus parvirostris Dana, 1852
- Species Alpheus euchirus Dana, 1852
- Species Alpheus eulimene De Man, 1909
- Species Alpheus euphrosyne De Man, 1897
- Species Alpheus eurydactylus De Man, 1920
- Species Alpheus exilis Kim & Abele, 1988
- Species Alpheus explorator Boone, 1935
- Species Alpheus facetus De Man, 1908
- Species Alpheus fagei Crosnier & Forest, 1965
- Species Alpheus fasciatus Lockington, 1878
- Species Alpheus fasqueli Anker, 2001
- Species Alpheus faxoni Coutière, 1900
- Species Alpheus felgenhaueri Kim & Abele, 1988
- Species Alpheus fenneri Bruce, 1994
- Species Alpheus firmus Kim & Abele, 1988
- Species Alpheus flavescens Latreille, 1806
- Species Alpheus floridanus Kingsley, 1878
- Species Alpheus forceps White, 1847 accepted as Alpheus malabaricus (Fabricius, 1775)
- Species Alpheus foresti Banner & Banner, 1981
- Species Alpheus formosus Gibbes, 1850
- Species Alpheus fossor Paulson, 1875 accepted as Synalpheus fossor (Paulson, 1875)
- Species Alpheus frontalis H. Milne Edwards, 1837
- Species Alpheus fujitai Nomura & Anker, 2005
- Species Alpheus funafutensis Borradaile, 1899
- Species Alpheus fushima Nomura, 2009
- Species Alpheus gabrieli Gourret, 1887 accepted as Alpheus dentipes Guérin, 1832
- Species Alpheus galapagensis Sivertsen, 1933
- Species Alpheus galathea Miers, 1874
- Species Alpheus gallicus Scioli & Anker, 2020
- Species Alpheus gambarelloides Nardo, 1847 accepted as Synalpheus gambarelloides (Nardo, 1847)
- Species Alpheus gambarellus Nardo, 1847
- Species Alpheus georgei Banner & Banner, 1982
- Species Alpheus glaber (Olivi, 1792)
- Species Alpheus gracilidigitus Miers, 1884 accepted as Alpheus pacificus Dana, 1852
- Species Alpheus gracilipes Stimpson, 1860
- Species Alpheus gracilis Heller, 1861
- Species Alpheus grahami Abele, 1975
- Species Alpheus haanii Ortmann, 1890
- Species Alpheus hailstonei Coutière, 1905
- Species Alpheus halesii Kirk, 1887 accepted as Alpheus glaber (Olivi, 1792)
- Species Alpheus hamus Kim & Abele, 1988 accepted as Alpheus colombiensis Wicksten, 1988
- Species Alpheus harfordi Kingsley, 1878 accepted as Betaeus harfordi (Kingsley, 1878)
- Species Alpheus hebes Kim & Abele, 1988
- Species Alpheus heeia Banner & Banner, 1975
- Species Alpheus hephaestus Bracken-Grissom & Felder, 2014
- Species Alpheus heronicus Banner & Banner, 1982
- Species Alpheus heterocarpus (Yu, 1935)
- Species Alpheus heterochaelis Say, 1818
- Species Alpheus heurteli Coutière, 1897
- Species Alpheus hippothoe De Man, 1888
- Species Alpheus holthuisi Ribeiro, 1964
- Species Alpheus homochirus (Yu, 1935)
- Species Alpheus hoonsooi Kim & Abele, 1988
- Species Alpheus hoplites Nobili, 1906
- Species Alpheus hoplocheles Coutière, 1897
- Species Alpheus hortensis Wicksten & McClure, 2003
- Species Alpheus huikau Banner, 1959 accepted as Metalpheus rostratipes (Pocock, 1890)
- Species Alpheus hululensis Coutière, 1905
- Species Alpheus hutchingsae Banner & Banner, 1982
- Species Alpheus hyeyoungae Kim & Abele, 1988
- Species Alpheus hyphalus Chace, 1988
- Species Alpheus idiocheles Coutière, 1905
- Species Alpheus ikedosoma Komai, 2015
- Species Alpheus imitatrix De Man, 1909
- Species Alpheus immaculatus Knowlton & Keller, 1983
- Species Alpheus inca Wicksten & Méndez G., 1981
- Species Alpheus inopinatus Holthuis & Gottlieb, 1958
- Species Alpheus insignis Heller, 1861 accepted as Alpheus diadema Dana, 1852
- Species Alpheus intermedius Stimpson, 1860
- Species Alpheus intrinsecus Spence Bate, 1888
- Species Alpheus isodactylus Afzal, Javed & Barkati, 1986
- Species Alpheus isthmalleator Hurt, Anker & Knowlton, 2009
- Species Alpheus japonicus Miers, 1879
- Species Alpheus javieri Anker, Hurt & Knowlton, 2009
- Species Alpheus jourdainii Guérin-Méneville, 1857
- Species Alpheus kagoshimanus Hayashi & Nagata, 2000
- Species Alpheus karplusi Anker, 2022
- Species Alpheus kingsleyi Miers, 1879 accepted as Alpheus brevicristatus De Haan, 1844
- Species Alpheus kuroshimensis Nomura & Anker, 2005
- Species Alpheus labis Banner & Banner, 1982
- Species Alpheus lacertosus Kim & Abele, 1988
- Species Alpheus ladronis Banner, 1956
- Species Alpheus laevigatus Guérin-Méneville, 1838 accepted as Betaeus emarginatus (H. Milne Edwards, 1837)
- Species Alpheus laevigatus Nicolet in Gay, 1849 accepted as Betaeus harfordi (Kingsley, 1878)
- Species Alpheus laevimanus Heller, 1862 accepted as Synalpheus gambarelloides (Nardo, 1847)
- Species Alpheus laevis Randall, 1840 accepted as Alpheus lottini Guérin, 1829
- Species Alpheus laeviusculus Lockington, 1878 accepted as Synalpheus digueti Coutière, 1909
- Species Alpheus lanceloti Coutière, 1905
- Species Alpheus lanceostylus Banner, 1959
- Species Alpheus lancirostris Rankin, 1900
- Species Alpheus latifrons A. Milne-Edwards, 1873 accepted as Alpheus frontalis H. Milne Edwards, 1837
- Species Alpheus latus Kim & Abele, 1988
- Species Alpheus lentiginosus Anker & Nizinski, 2011
- Species Alpheus lepidus De Man, 1908
- Species Alpheus leptocheles Banner & Banner, 1975
- Species Alpheus leptochiroides De Man, 1909
- Species Alpheus leptochirus Coutière, 1905
- Species Alpheus leviusculus Dana, 1852
- Species Alpheus lineifer Miers, 1875 accepted as Alpheus parvirostris Dana, 1852
- Species Alpheus litteratus Weber, 1795
- Species Alpheus lobidens De Haan, 1849
- Species Alpheus longecarinatus Hilgendorf, 1879
- Species Alpheus longichaelis Carvacho, 1979
- Species Alpheus longiforceps Hayashi & Nagata, 2002
- Species Alpheus longimanus Spence Bate, 1888 accepted as Alpheus japonicus Miers, 1879
- Species Alpheus longinquus Kim & Abele, 1988
- Species Alpheus longipalma Komai & Ohtomi, 2018
- Species Alpheus lottini Guérin, 1829
- Species Alpheus luciae Barnard, 1947 accepted as Alpheus sulcatus Kingsley, 1878
- Species Alpheus luiszapatai Ramos-Tafur, 2018
- Species Alpheus lutini Coutière, 1905 accepted as Alpheus obesomanus Dana, 1852
- Species Alpheus lutosus Anker & De Grave, 2009
- Species Alpheus macellarius Chace, 1988
- Species Alpheus macrocheles (Hailstone, 1835)
- Species Alpheus macrochirus Richters, 1880 accepted as Alpheus sulcatus Kingsley, 1878
- Species Alpheus macrodactylus Ortmann, 1890
- Species Alpheus macroskeles Alcock & Anderson, 1899
- Species Alpheus maindroni Coutière, 1898
- Species Alpheus malabaricus (Fabricius, 1775)
- Species Alpheus malhaensis Coutière, 1908 accepted as Alpheus collumianus Stimpson, 1860
- Species Alpheus malleator Dana, 1852
- Species Alpheus malleodigitus (Spence Bate, 1888)
- Species Alpheus mangalis Anker, 2023
- Species Alpheus mannarensis Purushothaman, Abhilash, Ajith Kumar & Lal, 2021
- Species Alpheus manorensis Afzal, Javed & Barkati, 1986
- Species Alpheus margaritae Salgado-Barragán, Ayón-Parente & Zamora-Tavares, 2017
- Species Alpheus martini Kim & Abele, 1988
- Species Alpheus mathewsae Anker, 2012
- Species Alpheus maxilliplanus Christoffersen, 1979 accepted as Alpheus chacei Carvacho, 1979
- Species Alpheus mazatlanicus Wicksten, 1983
- Species Alpheus megacheles (Hailstone, 1835) accepted as Alpheus macrocheles (Hailstone, 1835)
- Species Alpheus microrhynchus De Man, 1897
- Species Alpheus microscaphis (Banner, 1959)
- Species Alpheus microstylus (Spence Bate, 1888)
- Species Alpheus midas Pachelle & Anker, 2024
- Species Alpheus miersi Coutière, 1898
- Species Alpheus migrans Lewinsohn & Holthuis, 1978
- Species Alpheus millsae Anker, Hurt & Knowlton, 2007
- Species Alpheus milnei Guérin-Méneville, 1857 accepted as Alpheus macrocheles (Hailstone, 1835)
- Species Alpheus minor De Haan, 1844 accepted as Alpheus haanii Ortmann, 1890
- Species Alpheus minus Say, 1818 accepted as Synalpheus minus (Say, 1818)
- Species Alpheus mitis Dana, 1852
- Species Alpheus miyakei Miya, 1974
- Species Alpheus mohammadpouri Dehghani, Sari & Naderloo, 2019
- Species Alpheus monoceros Heller, 1861 accepted as Athanas dimorphus Ortmann, 1894
- Species Alpheus moretensis Banner & Banner, 1982
- Species Alpheus naos Anker, Hurt & Knowlton, 2007
- Species Alpheus naranjo Anker, 2018
- Species Alpheus neomeris De Man, 1897 accepted as Synalpheus neomeris (De Man, 1897)
- Species Alpheus neptunus Dana, 1852 accepted as Synalpheus neptunus neptunus (Dana, 1852)
- Species Alpheus nigrospinatus Rankin, 1898 accepted as Alpheus websteri Kingsley, 1880
- Species Alpheus nigro-spinatus Rankin, 1898 accepted as Alpheus nigrospinatus Rankin, 1898
- Species Alpheus nipa Banner & Banner, 1985
- Species Alpheus nobili Banner & Banner, 1966
- Species Alpheus nomurai Anker, 2023
- Species Alpheus nonalter Kensley, 1969
- Species Alpheus normanni Kingsley, 1878
- Species Alpheus notabilis Stebbing, 1915
- Species Alpheus novaezealandiae Miers, 1876
- Species Alpheus novae-zealandiae Miers, 1876 accepted as Alpheus novaezealandiae Miers, 1876
- Species Alpheus nuno Anker, 2012
- Species Alpheus nuttingi (Schmitt, 1924)
- Species Alpheus oahuensis (AH Banner, 1953)
- Species Alpheus obesomanus Dana, 1852
- Species Alpheus obeso-manus Dana, 1852 accepted as Alpheus obesomanus Dana, 1852
- Species Alpheus ochrostriatus Karplus, Szlep & Tsurnamal, 1981
- Species Alpheus octocellatus Anker & Benzoni, 2023
- Species Alpheus ovaliceps Coutière, 1905
- Species Alpheus pachychirus Stimpson, 1860
- Species Alpheus pacificus Dana, 1852
- Species Alpheus packardii Kingsley, 1880
- Species Alpheus paludicola Kemp, 1915
- Species Alpheus panamensis Kingsley, 1878
- Species Alpheus papillosus Banner & Banner, 1982
- Species Alpheus parabrevipes Coutière, 1898 accepted as Alpheus acutofemoratus Dana, 1852
- Species Alpheus paracrinitus Miers, 1881
- Species Alpheus paraculeipes Coutière, 1905 accepted as Alpheus spongiarum Coutière, 1897
- Species Alpheus paradentipes Coutière, 1905
- Species Alpheus paraformosus Anker, Hurt & Knowlton, 2008
- Species Alpheus paragracilis Coutière, 1897 accepted as Metalpheus paragracilis (Coutière, 1897)
- Species Alpheus paralcyone Coutière, 1905
- Species Alpheus paralpheopsides Coutière, 1905
- Species Alpheus parasocialis Banner & Banner, 1982
- Species Alpheus pareuchirus Coutière, 1905
- Species Alpheus parvimaculatus Nomura & Anker, 2005
- Species Alpheus parvimanus Kingsley, 1878
- Species Alpheus parvirostris Dana, 1852
- Species Alpheus parvi-rostris Dana, 1852 accepted as Alpheus parvirostris Dana, 1852
- Species Alpheus parvus De Man, 1909
- Species Alpheus peasei (Armstrong, 1940)
- Species Alpheus pelagicus Risso, 1816 accepted as Acanthephyra pelagica (Risso, 1816)
- Species Alpheus percyi Coutière, 1908
- Species Alpheus perezi Coutière, 1908
- Species Alpheus perlas Anker & Pachelle, 2019
- Species Alpheus perplexus Banner, 1956
- Species Alpheus persicus Nobili, 1905 accepted as Alpheus malleodigitus (Spence Bate, 1888)
- Species Alpheus petronioi Almeida, Terrosi & Mantelatto, 2014
- Species Alpheus philoctetes De Man, 1909
- Species Alpheus phrygianus Coutière, 1905 accepted as Alpheus malleodigitus (Spence Bate, 1888)
- Species Alpheus pictor Weber, 1795
- Species Alpheus pinnophylax Otto, 1828 accepted as Pontonia pinnophylax (Otto, 1821)
- Species Alpheus platycheirus Boone, 1927
- Species Alpheus platydactylus Coutière, 1897
- Species Alpheus platyrhynchus Heller, 1862 accepted as Alpheus macrocheles (Hailstone, 1835)
- Species Alpheus platyunguiculatus (AH Banner, 1953)
- Species Alpheus poeyi Guérin-Méneville, 1855 accepted as Alpheus formosus Gibbes, 1850
- Species Alpheus polaris Sabine, 1824 accepted as Lebbeus polaris (Sabine, 1824)
- Species Alpheus polystictus Knowlton & Keller, 1985
- Species Alpheus polyxo De Man, 1909
- Species Alpheus pomatoceros Banner & Banner, 1966 accepted as Alpheus splendidus Coutière, 1897
- Species Alpheus pontederiae de Rochebrune, 1883
- Species Alpheus pouang Christoffersen, 1979
- Species Alpheus praecox Herrick, 1888 accepted as Synalpheus pectiniger Coutière, 1907
- Species Alpheus praedator De Man, 1908
- Species Alpheus prolificus Spence Bate, 1888 accepted as Synalpheus charon (Heller, 1861)
- Species Alpheus proseuchirus De Man, 1908
- Species Alpheus providencei Coutière, 1908 accepted as Alpheus paralcyone Coutière, 1905
- Species Alpheus pseudoedwardsii Afzal, Javed & Barkati, 1986
- Species Alpheus pseudopugnax (AH Banner, 1953)
- Species Alpheus puapeba Christoffersen, 1979
- Species Alpheus pubescens De Man, 1908
- Species Alpheus pugilator A. Milne-Edwards, 1878 accepted as Alpheus malleator Dana, 1852
- Species Alpheus pugnax Dana, 1852
- Species Alpheus punctatus Anker, 2012
- Species Alpheus punctulatus Risso, 1822 accepted as Penaeus kerathurus (Forskål, 1775)
- Species Alpheus purpurilenticularis Karplus & Ben Tuvia, 1979
- Species Alpheus pustulosus Banner & Banner, 1968
- Species Alpheus quadratus Weber, 1795
- Species Alpheus quasirapacida Chace, 1988
- Species Alpheus ramosportoae Soledade, Terossi, Scioli, Mantelatto & Almeida, 2019
- Species Alpheus randalli Banner & Banner, 1980
- Species Alpheus rapacida De Man, 1908
- Species Alpheus rapax Fabricius, 1798
- Species Alpheus rathbuni Coutière, 1900
- Species Alpheus rectus Kim & Abele, 1988
- Species Alpheus rhode White, 1847 accepted as Alpheus strenuus strenuus Dana, 1852
- Species Alpheus ribeiroae Anker & Dworschak, 2004
- Species Alpheus richardsoni Yaldwyn, 1971
- Species Alpheus richpalmeri Anker, 2020
- Species Alpheus Ridleyi Pocock, 1890 accepted as Alpheus websteri Kingsley, 1880
- Species Alpheus roblesi Bracken-Grissom & Felder, 2014
- Species Alpheus romensky Burukovsky, 1990
- Species Alpheus roquensis Knowlton & Keller, 1985
- Species Alpheus roseodigitalis Nomura & Anker, 2005
- Species Alpheus rostratipes Pocock, 1890 accepted as Metalpheus rostratipes (Pocock, 1890)
- Species Alpheus rostratus Kim & Abele, 1988
- Species Alpheus rouxii Guérin-Méneville, 1857 accepted as Alpheus lottini Guérin, 1829
- Species Alpheus ruber (Rafinesque, 1814) accepted as Alpheus glaber (Olivi, 1792)
- Species Alpheus rubromaculatus Karplus, Szlep & Tsurnamal, 1981
- Species Alpheus rudolphi Almeida & Anker, 2011
- Species Alpheus rugimanus A. Milne-Edwards, 1878
- Species Alpheus Rumphii Weber, 1795
- Species Alpheus samoa Banner & Banner, 1966
- Species Alpheus samudra De Grave, Krishnan, Kumar K.P. & Christodoulou, 2020
- Species Alpheus sarapis Anker, 2025
- Species Alpheus saulcyi Guérin-Méneville, 1855
- Species Alpheus savignyi Guérin-Méneville, 1857
- Species Alpheus savuensis De Man, 1908
- Species Alpheus saxidomus Holthuis, 1980
- Species Alpheus scaber Weber, 1795
- Species Alpheus schmitti Chace, 1972
- Species Alpheus schubarti Anker, 2024
- Species Alpheus sciolii Anker, 2022
- Species Alpheus scopulus Kim & Abele, 1988
- Species Alpheus scriptus Risso, 1822 accepted as Periclimenes scriptus (Risso, 1822)
- Species Alpheus sculptimanus Guérin-Méneville, 1857
- Species Alpheus semicylindrus Weber, 1795
- Species Alpheus senex Weber, 1795
- Species Alpheus serenei Tiwari, 1964
- Species Alpheus setimanus Cano, 1888
- Species Alpheus setosus Weber, 1795
- Species Alpheus seurati Coutière, 1905 accepted as Alpheus collumianus Stimpson, 1860
- Species Alpheus sexpes Weber, 1795
- Species Alpheus shearmii Alcock & Anderson, 1899 accepted as Alpheopsis shearmii (Alcock & Anderson, 1899)
- Species Alpheus shukran Anker, 2024
- Species Alpheus sibogae De Man, 1908
- Species Alpheus similis Czerniavsky, 1884 accepted as Alpheus dentipes Guérin, 1832
- Species Alpheus simus Guérin-Méneville, 1855
- Species Alpheus sinuosus Guérin-Méneville, 1857 accepted as Betaeus truncatus Dana, 1852
- Species Alpheus sivado Risso, 1816 accepted as Pasiphaea sivado (Risso, 1816)
- Species Alpheus sizou Banner & Banner, 1967
- Species Alpheus socialis Heller, 1862
- Species Alpheus soelae Banner & Banner, 1986
- Species Alpheus songkla Banner & Banner, 1966
- Species Alpheus soror Bruce, 1999
- Species Alpheus spatulatus Banner & Banner, 1968
- Species Alpheus spinicaudus Lockington, 1878
- Species Alpheus spinifrons H. Milne Edwards, 1837 accepted as Synalpheus spinifrons (H. Milne Edwards, 1837)
- Species Alpheus spiniger Stimpson, 1860 accepted as Synalpheus spiniger (Stimpson, 1860)
- Species Alpheus splendidus Coutière, 1897
- Species Alpheus spongiarum Coutière, 1897
- Species Alpheus stanleyi Coutière, 1908
- Species Alpheus stantoni Banner & Banner, 1986
- Species Alpheus staphylinus Coutière, 1908
- Species Alpheus stephensoni Banner & Smalley, 1969
- Species Alpheus Stimpsonii De Man, 1888 accepted as Synalpheus stimpsonii (De Man, 1888)
- Species Alpheus strenuus Dana, 1852
- Species Alpheus streptochirus Stimpson, 1860 accepted as Alpheus dentipes Guérin, 1832
- Species Alpheus styliceps Coutière, 1905
- Species Alpheus sublucanus (Forsskål, 1775) accepted as Alpheus lottini Guérin, 1829
- Species Alpheus sudara Banner & Banner, 1966
- Species Alpheus sulcatus Kingsley, 1878
- Species Alpheus sulcipalma Purushothaman, Bharathi, Damodhar, Kumar & Lal, 2023
- Species Alpheus suluensis Chace, 1988
- Species Alpheus supachai Banner & Banner, 1966
- Species Alpheus superciliaris Coutière, 1905
- Species Alpheus takla Anker, 2023
- Species Alpheus talismani Coutière, 1898
- Species Alpheus tampensis Anker, 2012
- Species Alpheus tamulus Fabricius, 1798
- Species Alpheus tasmanicus Banner & Banner, 1982
- Species Alpheus tenuicarpus De Man, 1908
- Species Alpheus tenuimanus Lockington, 1878
- Species Alpheus tenuipes De Man, 1910
- Species Alpheus tenuis Kim & Abele, 1988
- Species Alpheus tetragonus Weber, 1795
- Species Alpheus thetis White, 1847 accepted as Alpheus lottini Guérin, 1829
- Species Alpheus thomasi Hendrix & Gore, 1973
- Species Alpheus thompsoni Anker, 2022
- Species Alpheus tigrinus Anker, 2024
- Species Alpheus tinctor Weber, 1795
- Species Alpheus tirmiziae Kazmi, 1974
- Species Alpheus togatus (Armstrong, 1940) accepted as Alpheus paracrinitus Miers, 1881
- Species Alpheus transversodactylus Kingsley, 1878 accepted as Alpheus clamator Lockington, 1877
- Species Alpheus transverso-dactylus Kingsley, 1878 accepted as Alpheus clamator Lockington, 1877
- Species Alpheus tricolor Anker, 2001
- Species Alpheus tricuspidatus Heller, 1861 accepted as Synalpheus tricuspidatus (Heller, 1861)
- Species Alpheus tridens Weber, 1795
- Species Alpheus tridentatus Zehntner, 1894 accepted as Alpheus bidens (Olivier, 1811)
- Species Alpheus tridentulatus Dana, 1852 accepted as Synalpheus tridentulatus (Dana, 1852)
- Species Alpheus triphopus Nobili, 1906
- Species Alpheus trisulcatus Leach, 1814 accepted as Penaeus kerathurus (Forskål, 1775)
- Species Alpheus triton White, 1847
- Species Alpheus triunguiculatus De Man, 1888 accepted as Synalpheus demani Borradaile, 1900
- Species Alpheus triunguiculatus Paulson, 1875 accepted as Synalpheus triunguiculatus (Paulson, 1875)
- Species Alpheus tuberculosus Osorio, 1892 accepted as Alpheus malleator Dana, 1852
- Species Alpheus tumidomanus Paulson, 1875 accepted as Synalpheus tumidomanus (Paulson, 1875)
- Species Alpheus tumido-manus Paulson, 1875 accepted as Alpheus tumidomanus Paulson, 1875
- Species Alpheus tungii Banner & Banner, 1966
- Species Alpheus Tyrhenus Risso, 1816 accepted as Pontonia pinnophylax (Otto, 1821)
- Species Alpheus ulalae Bracken-Grissom & Felder, 2014
- Species Alpheus umbo Kim & Abele, 1988
- Species Alpheus utriensis Ramos & von Prahl, 1989
- Species Alpheus vanderbilti Boone, 1930
- Species Alpheus vanuatu Anker, 2020
- Species Alpheus ventrosus H. Milne Edwards, 1837 accepted as Alpheus lottini Guérin, 1829
- Species Alpheus verrilli (Schmitt, 1924)
- Species Alpheus villosus (Olivier, 1811)
- Species Alpheus villus Kim & Abele, 1988
- Species Alpheus viridari (Armstrong, 1949)
- Species Alpheus viridis Otto, 1821 accepted as Hippolyte inermis Leach, 1816
- Species Alpheus viserion Anker, Leray & Pachelle, 2021
- Species Alpheus vittatus Nardo, 1847 accepted as Athanas nitescens (Leach, 1814)
- Species Alpheus vladivostokiensis (Vinogradov, 1950)
- Species Alpheus waltervadi Kensley, 1969
- Species Alpheus websteri Kingsley, 1880
- Species Alpheus wickstenae Christoffersen & Ramos, 1987
- Species Alpheus williamsi Bruce, 1994
- Species Alpheus wonkimi Anker & Pachelle, 2013
- Species Alpheus xanthocarpus Anker, Hurt & Knowlton, 2008
- Species Alpheus xishaensis Liu & Lan, 1980
- Species Alpheus zarenkovi Anker & Pachelle, 2015
- Species Alpheus zimmermani Anker, 2007
- Species Alpheus zulfaquiri Kazmi, 1982
- Genus Alphous Fabricius, 1798 accepted as Alpheus Fabricius, 1798
- Genus Amphibetaeus Coutière, 1897 (1)
- Genus Anebocaris Spence Bate, 1888
- Genus Arete Stimpson, 1860 (4)
- Genus Arethusa De Man, 1887
- Genus Aretopsis De Man, 1910 (3)
- Genus Asphalius Roux, 1831 accepted as Alpheus Fabricius, 1798
- Genus Athanas Leach, 1814 (44)
- Genus Athanopsis Coutière, 1897 (9)
- Genus Automate De Man, 1888 (14)
- Genus Autonomaea Risso, 1816 accepted as Alpheus Fabricius, 1798
- Genus Autonomea Risso, 1816 accepted as Autonomaea Risso, 1816
- Genus Bannereus Bruce, 1988 (3)
- Genus Batella Holthuis, 1955 (3)
- Genus Batellopsis Ashrafi, Ďuriš & Anker, 2024 (1)
- Genus Bermudacaris Anker & Iliffe, 2000 (3)
- Genus Betaeopsis Yaldwyn, 1971 (3)
- Genus Betaeus Dana, 1852 (16)
- Genus Bruceopsis Anker, 2010 (2)
- Genus Caligoneus Komai & Fujita, 2018 (1)
- Genus Cavipelta Hayashi, 1998 accepted as Stenalpheops Miya, 1997
- Genus Cheirothrix Spence Bate, 1888 accepted as Batella Holthuis, 1955
- Genus Chelomalpheus Kim, 1998 accepted as Stenalpheops Miya, 1997
- Genus Coronalpheus Wicksten, 1999 (1)
- Genus Coutieralpheus Anker & Felder, 2005 (1)
- Genus Crangon Weber, 1795 accepted as Alpheus Fabricius, 1798
- Genus Crosnierocaris Anker, 2022 (1)
- Genus Cryptophthalmus Rafinesque, 1814 accepted as Alpheus Fabricius, 1798
- Genus Deioneus Dworschak, Anker & Abed-Navandi, 2000 (1)
- Genus Diaphoropus Spence Bate, 1888
- Genus Dienecia Westwood, 1835 accepted as Alpheus Fabricius, 1798
- Genus Fenneralpheus Felder & Manning, 1986 (2)
- Genus Halopsyche de Saussure, 1857 accepted as Alpheus Fabricius, 1798
- Genus Hamalpheus Bruce & Iliffe, 1991 accepted as Betaeopsis Yaldwyn, 1971
- Genus Harperalpheus Felder & Anker, 2007 (2)
- Genus Homaralphaeus Spence Bate, 1876 accepted as Homaralpheus Spence Bate, 1888
- Genus Homaralpheus Spence Bate, 1888 accepted as Synalpheus Spence Bate, 1888
- Genus Jengalpheops Anker & Dworschak, 2007 (1)
- Genus Jousseaumea Coutière, 1897 accepted as Salmoneus Holthuis, 1955
- Genus Leptalpheus Williams, 1965 (19)
- Genus Leptathanas De Grave & Anker, 2008 (1)
- Genus Leslibetaeus Anker, Poddoubtchenko & Wehrtmann, 2006 (2)
- Genus Metabetaeus Borradaile, 1899 (4)
- Genus Metalpheus Coutière, 1908 (3)
- Genus Mohocaris Holthuis, 1973 (1)
- Genus Nauplius Risso, 1844 accepted as Alpheus Fabricius, 1798
- Genus Nennalpheus Banner & Banner, 1981 (3)
- Genus Neoalpheopsis AH Banner, 1953 accepted as Parabetaeus Coutière, 1897
- Genus Notalpheus Méndez G. & Wicksten, 1982 (1)
- Genus Oligorostra Ciampaglio & Weaver, 2008 † accepted as Alpheus Fabricius, 1798
- Genus Oligosella Ciampaglio & Weaver, 2008 † accepted as Alpheus Fabricius, 1798
- Genus Orygmalpheus De Grave & Anker, 2000 (1)
- Genus Pachelpheus Anker, 2020 (1)
- Genus Parabetaeus Coutière, 1897 (4)
- Genus Paralpheus Spence Bate, 1888 accepted as Alpheus Fabricius, 1798
- Genus Phleusa Nardo, 1847 accepted as Alpheus Fabricius, 1798
- Genus Pomagnathus Chace, 1937 (1)
- Genus Potamalpheops Powell, 1979 (17)
- Genus Prionalpheus Banner & Banner, 1960 (7)
- Genus Pseudalpheopsis Anker, 2007 (1)
- Genus Pseudathanas Bruce, 1983 (2)
- Genus Pterocaris Heller, 1862 (1)
- Genus Racilius Paulson, 1875 (1)
- Genus Richalpheus Anker & Jeng, 2006 (4)
- Genus Rugathanas Anker & Jeng, 2007 (2)
- Genus Salmoneus Holthuis, 1955 (73)
- Genus Stenalpheops Miya, 1997 (2)
- Genus Synalpheopsis Anker, 2023 (1)
- Genus Synalpheus Spence Bate, 1888 (172)
- Genus Thunor Armstrong, 1949 accepted as Alpheus Fabricius, 1798
- Genus Thuylamea Nguyên, 2001 (2)
- Genus Triacanthoneus Anker, 2010 (7)
- Genus Vexillipar Chace, 1988 (1)
- Genus Yagerocaris Kensley, 1988 (1)
- Genus Zuzalpheus Ríos & Duffy, 2007 accepted as Synalpheus Spence Bate, 1888
- Family Barbouriidae Christoffersen, 1987 (10)
- Family Bythocarididae Christoffersen, 1987 (20)
- Family Hippolytidae Spence Bate, 1888 (106)
- Family Lysmatidae Dana, 1852 (57)
- Family Merguiidae Christoffersen, 1990 (2)
- Family Ogyrididae Holthuis, 1955 (13)
- Family Thoridae Kingsley, 1878 (199)
- Superfamily Atyoidea De Haan, 1849 (560)
- Superfamily Bresilioidea Calman, 1896 (70)
- Superfamily Campylonotoidea Sollaud, 1913 (17)
- Superfamily Caridea incertae sedis †
- Superfamily Crangonoidea Haworth, 1825 (329)
- Superfamily Nematocarcinoidea Smith, 1884 (80)
- Superfamily Oplophoroidea Dana, 1852 (71)
- Superfamily Palaemonoidea Rafinesque, 1815 (1 149)
- Superfamily Pandaloidea Haworth, 1825 (203)
- Superfamily Pasiphaeoidea Dana, 1852 (104)
- Superfamily Physetocaridoidea Chace, 1940 accepted as Pandaloidea Haworth, 1825
- Superfamily Pleopteryxoidea Schweigert & Garassino, 2006 †
- Superfamily Processoidea Ortmann, 1896 (70)
- Superfamily Psalidopodoidea Wood-Mason (3)
- Superfamily Stylodactyloidea Spence Bate, 1888 (34)
- Family Hectarthropidae Spence Bate, 1888 accepted as Processidae Ortmann, 1896
- Family Prionorhynchus Leach, 1830
- Genus Caricyphus Spence Bate, 1888
- Genus Rhomaleocaris Spence Bate, 1888
- Infraorder Gebiidea (252)
- Infraorder Glypheidea (2)
- Infraorder Palaeopalaeomonida †
- Infraorder Polychelida (38)
- Infraorder Procarididea (6)
- Infraorder Stenopodidea (100)
- Suborder Reptantia
- Suborder Trichelida