端足類
多樣性及分類

卡爾·林奈在其第十版的《自然系統》（Systema Naturae）中描述了兩種端足類，不過描述得十分簡單且適用於差不多所有端足類。現時約已描述了7000種端足類，分類在3或4個亞目中。鉤蝦亞目下就包含了多過5500種，包括了所有淡水及陸生物種。英高蟲亞目包含了2科約40種，但這類有時被認為是與鉤蝦亞目相同，而非獨立的一個亞目。
端足類因其體型細小而很難辨認，往往都需要將之解剖才能確認。生態及環境研究很多都會將它們混為一談。端足類的分類尚未得到共識，當中以鉤蝦亞目內的關係產生最多混亂。以下是其中一個建議的分類法：
Ampeliscoidea
Crangonyctoidea
Dexaminoidea
Eusiroidea
Gammaroidea
Hadzioidea
Iphimedioidea
Kurioidea
Leucothoidea
Liljborgioidea
琴鈎蝦總科 Lysianassoidea
Melphidippoidea
Oedicerotoidea
Pardaliscoidea
Phoxocephaloidea
Stegocephaloidea
Stenothoidea
Synopioidea
Talitroidea
Thurstonelloidea
Caprellida
Caprelloidea
Phtisicoidea
Cyamida
鯨虱科（Cyamidae）
体箱𧊕次目（Physosomata）
錐𧊕總科（Scinoidea）
小矛𧊕總科（Lanceoloidea）
頭箱𧊕次目（Physocephalata）
路𧊕總科（Vibilioidea）
慎𧊕總科（Phronimoidea）
擬狼𧊕總科（Lycaeopsoidea）
寬腿𧊕總科（Platysceloidea）
英高蟲科（Ingolfiellidae）
Metaingolfiellidae
Acanthogammaridae
Acanthonotozomatidae
Acanthonotozomellidae
Acidostomatidae
Adeliellidae
Aetiopedesidae
Alicellidae
Allocrangonyctidae
Amaryllididae
Amathillopsidae
Ambasiidae
Ampeliscidae
Amphilochidae
Amphithyridae
藻钩虾科 Ampithoidae
Anapronoidae
异钩虾科 Anisogammaridae
Aoridae
Archaeoscinidae
Arcitalitridae
Argissidae
Aristiidae
Artesiidae
Astyridae
Atylidae
Australomicroprotopidae
Austroniphargidae
Baikalogammaridae
Bateidae
Bathyporeiidae
Behningiellidae
Bogidiellidae
Bolttsiidae
Bougisidae
Brachyscelidae
Brevitalitridae
Calliopiidae
麦秆虫科 Caprellidae
Caprellinoididae
Caprogammaridae
Carangoliopsidae
Carinogammaridae
Caspicolidae
Cebocaridae
Ceinidae
Cheidae
强螯钩虾科 Cheirocratidae
Cheluridae
Chevaliidae
Chillagoeidae
Chiltoniidae
Chuneolidae
Colomastigidae
Condukiidae
Conicostomatidae
Corophiidae
Crangonyctidae
Crangoweckeliidae
Cressidae
Crymostygidae
Crypturopodidae
Curiotalitridae
鲸虱科 Cyamidae
Cyclocaridae
Cyllopodidae
Cyphocarididae
Cyproideidae
Cystisomatidae
Dairellidae
Derjugianidae
Dexaminidae
Didymocheliidae
Dikwidae
Dogielinotidae
Dulichiidae
Dussartiellidae
Endevouridae
Eophliantidae
Epimeriidae
Eriopisidae
Eulimnogammaridae
Eupronoidae
Eurytheneidae
Eusiridae
Exoedicerotidae
Falklandellidae
Gamaridae
Gammaracanthidae
Gammarellidae
钩虾科 Gammaridae
Gammaroporeiidae
Giniphargidae
Hadziidae
Haustoriidae
Hirondelleidae
Hornelliidae
Hyalellidae
Hyalella S.I.Smith, 1874
Hyallela troglofugia Bastos-Pereira, Oliveira & Ferreira, 2018
Hyalella yashmara Tomikawa, Kawasaki, Leiva & Arroyo, 2023
Hyalidae
Hyperiidae
Hyperiopsidae
Iciliidae
Ingolfiellidae
Ipanemidae
Iphigenellidae
Iphimediidae
Isaeidae
壮角钩虾科 Ischyroceridae
Iulopididae
Izinkalidae
Kairosidae
Kamakidae
Kergueleniidae
Kergueleniolidae
Kotumsaridae
Kuriidae
Lafystiidae
Lanceolidae
Laphystiopsidae
Lepechinellidae
Lepidepecreellidae
Lestrigonidae
Leucothoidae
Liljeborgiidae
Luciobliviidae
Lycaeidae
Lycaeopsidae
琴鈎蝦科 Lysianassidae
Macrohectopidae
Maeridae
Magnovidae
Makawidae
Maxillipiidae
Megalanceolidae
Megaluropidae
Melitidae
Melphidippidae
Mesogammaridae
Metacrangonyctidae
Metaingolfiellidae
Metalanceolidae
Microphasmidae
Microprotopidae
Microprotopodidae
Microscinidae
Micruropidae
Micruropodidae
Mimonecteolidae
Mimonectidae
Mimoscinidae
Miramarassidae
Miramassidae
Najnidae
Neomegamphopidae
Neoniphargidae
Nihotungidae
Niphargidae
Nuuanuidae
Ochlesidae
Odiidae
Oedicerotidae
Ommatogammaridae
Opisidae
Otagiidae
Oxycephalidae
Pachyschesidae
Pagetinidae
Pakynidae
Pallaseidae
Parabogidiellidae
Paracalliopidae
Paracalliopiidae
Paracercopidae
Paracrangonyctidae
Paragammaropsidae
Paraleptamphopidae
Paraliscidae
Paramelitidae
Paramphithoidae
Paraphronimidae
Parargissidae
Parascelidae
Pardaliscidae
Perthiidae
Phliantidae
Photidae
Phoxocephalidae
Phoxocephalopsidae
Phreatogammaridae
Phronimidae
Phrosinidae
Platyischnopidae
Platyscelidae
Pleustidae
Plioplateidae
Plioplateiidae
Podoceridae
Podoprionidae
Podosiridae
Pontogammaridae
Pontogeneiidae
Pontoporeiidae
Priscillinidae
Priscomilitaridae
Prolanceolidae
Pronoidae
Proscinidae
Protodulichiidae
Protorchestiidae
Pseudamphilochidae
Pseudingolfiellidae
Pseudocrangonyctidae
Pseudoniphargidae
Rakiroidae
Regaliidae
Salentinellidae
Sanchoidae
Sandroidae
Scinidae
Scopelocheiridae
Sebidae
Seborgiidae
Sensonatoridae
Sicafodiidae
Sinurothoidae
Sophrosynidae
Stegocephalidae
Stenothoidae
Sternophysingidae
Stilipedidae
Synopiidae
Talitridae
Temnophliantidae
Thamneidae
Thoriellidae
Chevreuxiella Stephensen, 1915
Chevreuxiopsis Halfter & Coleman, 2019
Chevreuxiopsis franki Halfter & Coleman, 2019
Danaella Stephensen, 1925
Parachevreuxiella Andres, 1987
Thoriella Stephensen, 1915
Thurstonellidae
Trischizostomatidae
Tryphanidae
Tryphantidae
Tryphosidae
Tulearidae
Typhlogammaridae
Uhlorchestiidae
Unciolidae
Uristidae
Urohaustoriidae
Uronyctidae
Urothoidae
Valettidae
Valettiidae
Valettiopsidae
Vemanidae
Vibiliidae
Vicmusiidae
Vitjazianidae
Wandinidae
Zaramillidae
Zobrachoidae
Anisopus Templeton, 1837
Apocyamus Margolis, McDonald & Bousfield, 2000
Austrohyalella Bousfield, 1996
Axelboekia
Cylindrimolaris Ortiz & Lalana, 1999
Electicus Lowry & Stoddart, 1997
Gainella Chevreux, 1911
Gammaroidorum Jarzembowski, Chény, Fang & Wang, 2020
Humilomoera Staude, 1995
细螯虾属 Leptochela Boeck, 1876
Mesocyamus Margolis, McDonald & Bousfield, 2000
Mesohyalella Bousfield, 1996
Moanamoera Staude, 1995
Paraneohela Oldevig, 1959
Poeckilogammarus
Polichinellobizarrocomic
Praegmelina Derjavin, 1929
Rhithromoera Staude, 1995
Rosagammarus McMenamin, Zapata & Hussey, 2013
Stenia Dana, 1849
Transitroides Bousfield & Poinar, 1994
Variogammarus Tachteew, 1995