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List of crustaceans of Ireland
 There are 1,774 species of crustaceans recorded in Ireland.[1][2][3][4][5][6][7][8][9] Crustaceans are arthropods of the subphylum Crustacea. Most are aquatic, such as shrimp, barnacles, lobsters, crayfish, krill, but some are also adapted for land living, such as woodlice and crabs. Class Branchiopoda (water fleas, etc.)Order AnomopodaFamily BosminidaeFamily Chydoridae41 species including Family EurycercidaeEurycercus lamellatus Eurycercus glacialis Family IlyocryptidaeFamily Daphniidae 12 species including Family Macrothricidae8 species Order CtenopodaFamily Sididae3 species Family Holopediidae1 species Order HaplopodaFamily Leptodoridae1 species Order OnychopodaFamily Polyphemidae1 species Family Cercopagididae2 species Family Podonidae4 species Class MalacostracaOrder LeptostracaFamily Nebaliidae2 species including Order StomatopodaFamily Nannosquillidae1 species Family Squillidae1 species Order AmphipodaFamily Aoridae15 species including Family Ampeliscidae15 species including
Family Ampithoidae6 species including
Family CalliopiidaeFamily Caprellidae (skeleton shrimps, ghost shrimps) 11 species including
Family Cheirocratidae1 species Family Corophiidae14 species including
Family Crangonyctidae1 species Family Eusiridae6 species Family Calliopidae1 species Family Dexaminidae8 species including Family EulimnogammaridaeFamily Gammaridae15–16 species 
Family Gammarellidae2 species Family Megaluropidae1 species Family Talitridae (landhoppers, sandhoppers, sand fleas) 6 species
Family Melphidippidae2 species Family Haustoriidae1 species Family Hyperiidae 7 species including Family Hyalidae6 species Family Ischyroceridae14 species including Family Leucothoidae4 species Family Colomastigidae1 species Family Cressidae1 species Family Stenothoidae10 species including Family Lysianassidae42 species including Family Synopiidae2 species Family Argissidae1 species Family Iphimediidae6 species Family Stegocephalidae1 species Family Acanthonotozomellidae1 species Family Epimeriidae1 species Family Liljeborgiidae3 species Family Pardaliscidae1 species Family Melitidae13 species including Family Niphargidae3 species
  Family Oedicerotidae11 species including
Family Pleustidae5 species Family Amphilochidae5–6 species including Family Cyproideidae1 species Family Phoxocephalidae8–9 species Family Photidae8 species including Family Pontoporeiidae 7 species
Family Urothoidae3 species Family Isaeidae2 species including Family Microprotidae[check spelling]1 species Family Cheluridae1 species Family Dulichiidae2 species Family Podoceridae3 species Family Phtisicidae2 species Family Mimonectidae2? species Family Scinidae10 species Family Lanceolidae5 species Family Vibiliidae4 species Family Cystisomatidae4 species Family Dairellidae1 species Family Phronimidae1 species Family Phrosinidae3 species Family Pronoidae1species Family Brachyscelidae1 species Family Tryphanidae1 species Family Platyscelidae1 species Order BathynellaceaFamily Bathynellidae1 species Order Cumacea (hooded shrimp, comma shrimp)Family Bodotriidae.jpg) 9 species including Family Diastylidae12 species including Family Leuconidae2 species Family Nannastacidae6 species Family Pseudocumatidae2 species Family Lampropidae2 species Order EuphausiaceaFamily Bentheuphausiidae1 species Family Euphausiidae13 species Order DecapodaFamily Aristeidae1 species Family Benthesicymidae2 species Family Solenoceridae1 species Family Sergestidae3 species Family Stenopodidae1 species Family Pasiphaeidae4 species Family Oplophoridae9 species Family Bresiliidae1 species Family Nematocarcinidae2 species Family Palaemonidae6 species Family Processidae2 species Family Lithodidae2 species Family Chirostylidae3 species Family Homolidae1 species Family Cymonomidae1 species Family Glyphocrangonidae1 species Family Laomediidae1 species Family Polychelidae8 species Family AkanthophoreidaeFamily Alpheidae (snapping shrimp, pistol shrimp, alpheid shrimp)3 species including Family Astacidae (freshwater crayfish)1 species
Family Atelecyclidae 1 species
Family Thiidae1 species Family Axiidae2 species including Family Callianassidae2 species including
Family CalliopiidaeFamily Cancridae 2 species including
Family Corystidae 1 species
Family Crangonidae11 species including
Family Diogenidae (left-handed hermit crabs) 1 species
Family EpialtidaeFamily Galatheidae 10 species including
Family Goneplacidae 1 species
Family Grapsidae (marsh crabs, shore crabs, talon crabs) 2 species including
Family Hippolytidae (broken-back shrimp, anemone shrimp)13 species including Family Inachidae
Family Leucosiidae 5 species including
Family Majidae 17 species including
Family Nephropidae (lobsters)
3 species including
Family Paguridae 11 species including
Family Parapaguridae1 species Family Oregoniidae
Family Palaemonidae
Family Palinuridae2 species including
Family Pandalidae5 species including
Family Pilumnidae
Family Pinnotheridae2 species including
Family Pirimelidae1 species Family Porcellanidae (porcelain crab)2 species
Family Portunidae (swimming crabs) 14 species including
Family Geryonidae3 species Family Thoridae (broken-back shrimp, anemone shrimp)Family Upogebiidae2 species Family Xanthidae (mud crabs, pebble crabs, rubble crabs) 6 species including Order IsopodaFamily AnthuridaeFamily Arcturidae3 species Family Armadillidiidae (pill bugs, roly polies, doodle bugs)7 species 
Family Asellidae.jpg)
Family AtylidaeFamily Cirolanidae 10 species
Family Idoteidae.jpg) 8 species Family Janiridae10 species Family Ligiidae1 species
Family Limnoriidae (gribble worms)2 species
Family Munnidae4 species Family Oniscidae1 species
Family Philosciidae1 species
Family Porcellionidae8 species 
Family Sphaeromatidae
Family Trichoniscidae13 species
Family Paramunnidae2 species Family Pleurogonidae2 species Family Thambematidae1 species Family Desmosomatidae2 species Family Eurycopidae6 species Family Ischnomesidae2 species Family Munnopsididae2 species Family Bopyridae7 species Family Hemioniscidae1 species Family Phryxidae3 species Family Styloniscidae1 species Family Halophilosciidae1 species Family Platyarthridae1 species Family Cylisticidae1 species Family Leptanthuridae1 species Family Ancinidae1 species Family Aegidae6 species Family Dendrotiidae2 species Family Haploniscidae10 species Family Ilyarachnidae1 species Order Mysida (opossum shrimps)Family Petalophthalmidae3 species Family Mysidae66 species including 
Order Tanaidacea (tanaids)
Family Tanaidae1 species Family Paratanaidae2 species Family Anarthruridae3 species Family Typhlotanaidae2 species Family Nototanaidae1species Family Neotanaidae2 species Family Apseudidae1 species Family Sphyrapidae2 species Class MaxillopodaOrder ArguloidaFamily Argulidae (carp lice, fish lice) 2 species including
Order MisophrioidaFamily Misophriidae1 species Order CalanoidaFamily Calocalanidae5 species including Family Diaptomidae6 species including Family Temoridae4 species Family Metridinidae10 species Family Centropagidae6 species Family Lucicutiidae8 species Family Heterorhabdidae12 species Family Augaptilidae28 species Family Arietellidae6 species Family Nullosetigeridae2 species Family Pseudocyclopidae2 species Family Candaciidae6 species Family Pontellidae4 species Family Parapontellidae1 species Family Bathypontiidae1 species Family Acartiidae4 species Family Clausocalanidae5 species Family Calanidae7 species Family Mecynoceridae1 species Family Eucalanidae4 species Family Megacalanidae3 species Family Paracalanidae3 species Family Spinocalanidae7 species Family Aetideidae35 species Family Euchaetidae12 species Family Phaennidae12 species Family Scolecitrichidae22 species Family Diaixidae2 species Family Stephidae3 species Family Tharybidae3 species Family Pseudocyclopiidae1 species Order KentrogonidaFamily Sacculinidae1 species Order ApygophoraFamily Trypetesidae2 species Order CyclopoidaFamily EnteropsidaeFamily Oithonidae6 species Family Cyclopinidae8 species Family Oithonidae6 species Family Cyclopinidae8 species Family Cyclopidae41 species Family Notodelphyidae23 species Family Ascidicolidae12 species Order HarpacticoidaFamily Cylindropsyllidae3 species Family DactylopusiidaeFamily Harpacticidae 12 species
Family Longipediidae6 species Family Canuellidae2 species Family Aegisthidae2 species Family Ectinosomatidae16-17 species Family Darcythompsoniidae2 species Family Euterpinidae1 species Family Tachidiidae5 species Family Thompsonulidae1 species Family Tisbidae18 species Family Porcellidiidae4-5 species Family Peltidiidae8 species Family Clytemnestridae2 species Family Tegastidae4 species Family Thalestridae34 species Family Ambunguipedidae1 species Family Balaenophilidae1 species Family Parastenheliidae1 species Family Diosaccidae38 species Family Metidae1 species Family Ameiridae23 species Family Paramesochridae5 species Family Tetragonicipitidae6 species Family Canthocamptidae26 species Family Orthopsyllidae1 species Family Leptastacidae2 species Family Cletodidae8 species Family Huntemanniidae1 species Family Rhizothricidae3 species Family Argestidae2 species Family Laophontidae36 species Family Laophontopsidae1 species Family Normanellidae2 species Family Ancorabolidae3 species Order MormonilloidaFamily Mormonillidae2 species Order PoecilostomatoidaFamily Ergasilidae3 species Family Rhynchomolgidae4 species Family Macrochironidae1 species Family Sabelliphilidae4 species Family Lichomolgidae16-17 species Family Pseudanthessiidae5 species Family Oncaeidae14 species Family Sapphirinidae2 species Family Clausidiidae3 species Family Synaptiphilidae1 species Family Mytilicolidae3 species Family Anthessiidae1 species Family Myicolidae1 species Family Corycaeidae2-3 species Family Bomolochidae2 species Family Taeniacanthidae2 species Family Chondracanthidae6 species Family Splanchnotrophidae3 species Family Philichthyidae1 species Family Lamippidae2 species Family Synapticolidae1 species Family Phyllodicolidae1 species Family Herpyllobiidae1 species Order SiphonostomatoidaFamily Rataniidae1 species Family Asterocheridae16 species Family Artotrogidae1 species Family Dyspontiidae5 species Family Nanaspididae1 species Family Micropontiidae1 species Family Cancerillidae2 species Family Nicothoidae8 species Family Melinnacheridae1 species Family Caligidae18 species including Family Trebiidae1 species Family Pandaridae3 species Family Cecropidae3 species Family Dichelesthiidae1species Family Hatschekiidae1 species Family Lernanthropidae1 species Family Pennellidae6 species Family Sphyriidae2 species Family Lernaeopodidae10-11 species Order MonstrilloidaFamily Monstrillidae7 species Order ScalpellomorphaFamily Lepadidae 6 species
Order ScalpelliformesFamily Scalpellidae4 species including Order Sessilia (acorn barnacles)Family Coronulidae2 species Family Tetraclitidae1 species Family Archaeobalanidae3 species including Family Balanidae 6-7 species including Family Chthamalidae 2 species
Family Pyrgomatidae1 species
Family Verrucidae1 species Order PorocephalidaFamily Linguatulidae1 species Order PlatycopioidaFamily Platycopiidae1species Class Ostracoda (seed shrimps)Order MyodocopidaFamily Cylindroleberididae2 species Family Philomedidae1species Order HalocypridaFamily Polycopidae2 species Order PodocopidaFamily Bythocytheridae2-3 species Family Cytheridae1species Family Cytherideidae4 species Family Krithidae1 species Family Cuneocytheridae1 species Family Cytheruridae13 species Family Hemicytheridae5 species Family Leptocytheridae4 species Family Limnocytheridae5 species Family Loxoconchidae8 species Family Neocytherideidae1 species Family Paradoxostomatidae11 species Family Trachyleberididae6 species Family Xestoleberididae2 species Family Darwinulidae2 species Family Candonidae22 species including Family Cyprididae25 species including Family Ilyocyprididae2 species Family Pontocyprididae3 species See alsoReferences
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Index:
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