Malacostraca
Subclass: Eumalacostraca
Superorder: Eucarida
Order: Decapoda
Family: Aeglidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Aegla concepcionensis | Schmitt, 1942 | Tiger crab | - | Chile | Rediscovered in the wild | Access |
| Aegla expansa | Jara, 1992 | - | Chile | Extinct in the wild | Access |
Family: Aethridae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Hepatus praecox | Collins, Donovan & Dixon, 1997 | - | Late Pleistocene | Jamaica | Extinct | Access |
Family: Alpheidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Prionalpheus gomezi | Martínez-Iglesias & Carvacho, 1991 | (rediscovered) | Belize, Cuba, Guadeloupe & Honduras | Rediscovered | Access | |
| Racilius compressus | Paulson, 1875 | (rediscovered) | Global | Rediscovered | Access |
Family: Astacidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Pacifastacus nigrescens | Stimpson, 1857 | Sooty crayfish | Late 1800's | California, USA | Extinct | Access |
Family: Atyidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Atya brachyrhinus | H.H.Jr. Hobbs & Hart, 1982 | - | 1970 or 1972 | Cole's Cave, Barbados, Caribbean | Extinct | Access |
| Caridina apodosis | Cai & N.K. Ng, 1999 | - | 1994 | New Territories, Hong Kong | Extinct | Access |
| Caridina dennerli | von Rintelen & Cai, 2009 | 2013 | Sulawesi, Indonesia | Extinct in the wild? | Access | |
| Caridina linduensis | J. Roux, 1904 | - | (rediscovered) | Lake Lindu, Sulawesi, Indonesia | Rediscovered | Access |
| Caridina yilong | Cai & Liang, 1999 | - | 1983 | Yilong Lake, Shiping County, Yunnan Province, China | Extinct | Access |
| Elephantis natalensis | (Bouvier, 1925) | - | (rediscovered) | Madagascar & South Africa | Rediscovered | Access |
| Palaemonias ganteri | Hay, 1902 | Kentucky cave shrimp | (rediscovered) | Kentucky, USA | Rediscovered | Access |
| Sinodina acutipoda | (Liang, 1989) | - | 1986 | Yunna, China | Extinct | Access |
| Syncaris pasadenae | (Kingsley, 1897) | Pasadena freshwater shrimp | 1933 | Pasadena, California, USA | Extinct | Access |
Family: Axiidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Eiconaxius acutifrons | Bate, 1888 | - | (rediscovered) | Indonesia to Japan | Rediscovered | Access |
Family: Callianassidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Callichirus santensis | Hernáez, Buchmann & Santana, 2020 | Late Pleistocene | Brazil | Missing | Access |
Family: Callichiridae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Glypturus panamacanalensis | Klompmaker et al., 2015 | Holocene or Late Pleistocene | Cuba & Panama | Missing | Access |
Family: Cambaridae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Cambarellus alvarezi | Villalobos, 1952 | Alvarez's dwarf crayfish | pre-1995 | Ejido El Potosi spring, Galeana, Nuevo Leon state, Mexico | Extinct | Access |
| Cambarellus areolatus | Faxon, 1885 | - | ? | near Parras, Coahuila, Mexico | Missing | Access |
| Cambarellus chihuahuae | Hobbs, 1980 | Chihuahua dwarf crayfish | (rediscovered) | Ojo de Carbonera spring, Chihuahua State, México | Rediscovered | Access |
| Cambarus sheltae | (Cooper & Cooper, 1997) | Shelta Cave crayfish | (rediscovered) | Shelta Cave, Alabama, USA | Rediscovered | Access |
| Cambarus veitchorum | Cooper & Cooper, 1997 | White Spring Cave crayfish | 1968 | White Spring Cave, Limestone County, Alabama, USA | Missing | Access |
| Procambarus angustatus | Le Conte, 1856 | Sandhills crayfish | 1856 or before | Georgia, USA | Extinct | Access |
| Procambarus connus | Fitzpatrick, 1978 | Carroltton crayfish, Corrollton crayfish | ? | Mississippi (& Alabama?), USA | Extinct if valid | Access |
| Procambarus delicatus | Hobbs & Franz, 1986 | Big-cheeked cave crayfish | 1976 or 1986 | Ocala Natural Forest, Lake County, Florida, USA | Missing | Access |
| Procambarus paradoxus | (Ortmann, 1906) | - | 1940's | Puebla, Mexico | Missing | Access |
Family: Camptandriidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Tylodiplax tetralyphora | de Man, 1895 | - | (rediscovered) | Malaysia | Rediscovered | Access |
Family: Chasmocarcinidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Chinommatia littoralis | (Tesch, 1918) | - | (rediscovered) | Tanimbar Island, Indonesia | Rediscovered | Access |
Family: Chirostylidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Gastroptychus perarmatus | (Haig, 1968) | - | (rediscovered) | Gulf of California (northern), Mexico | Rediscovered | Access |
Family: Cryptochiridae (Coral Gall Crabs)
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Fizesereneia tholia | Kropp, 1994 | - | (rediscovered) | Indonesia & Maldives | Rediscovered | Access |
Family: Diogenidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Ciliopagurus liui | Forest, 1995 | - | (rediscovered) | Asia | Rediscovered | Access |
| Diogenes jubatus | (Nobili, 1903) | - | (rediscovered) | Singapore | Rediscovered | Access |
Family: Dotillidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Dotillopsis profuga | (Nobili, 1903) | - | (rediscovered) | Malaysia | Rediscovered | Access |
Family: Dromiidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Alcockdromia fallax | (Latreille in Milbert, 1812) | - | Mauritius | Rediscovered | Access |
Family: Epialtidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Herbstia exserta | Collins & Morris, 1976 | - | Late Pleistocene | Barbados | Extinct | Access |
Family: Eriphiidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Eriphia gonagra xaymacaensis | Collins & Donovan, 1998 | - | Late Pleistocene | Jamaica | Extinct | Access |
Family: Eucalliacidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Calliax nishiki | Ando et al., 2020 | - | ca 13,000 to 8,000 cal BP | Shinjima Island, Kagoshima, Kyushu, Japan | Missing | Access |
Family: Gecarcinidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| cf. Gecarcinus sp. nov. 'Bermuda' | - | - | Holocene | Bermuda Islands | Extinct | Access |
Family: Gecarcinucidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Austrothelphusa insularis | Colosi, 1919 | - | 1919 | Fiji? | Extant? | Access |
| Perbrinckia gabadagei | Bahir & Ng, 2005 | - | 1996 | Sri Lanka | Extinct | Access |
Family: Goneplacidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Carcinoplax indica | Doflein, 1904 | - | (rediscovered) | Great Nicobar Island, Japan & Suez Canal, Panama | Rediscovered | Access |
| Rhadinoplax microphthalmus | Guinot & Richer de Forges, 1981 | - | (rediscovered) | Japan & New Caledonia | Rediscovered | Access |
Family: Grapsidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Geograpsus severnsi | Paulay & Starmer, 2011 | Severns' terrestrial crab | 300 AD or later | Hawaiian Islands, USA | Extinct | Access |
| Parasesarma darwinense | (Campbell, 1967) | - | (rediscovered) | Northern Territory & Queensland, Australia | Rediscovered | Access |
| Sesarma aequatoriale | Ortmann, 1894 | - | (rediscovered) | Ecuador | Rediscovered | Access |
Family: Hippolytidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Heptacarpus jordani | (Rathbun, 1902) | - | (rediscovered) | Japan | Rediscovered | Access |
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Lysmata ternatensis |
de Man, 1902 | - | (rediscovered) | Lakshadweep Islands, India | Rediscovered | Access |
| Lysmata zacae | Armstrong, 1941 | - | (rediscovered) | Japan, New Caledonia & Samoa | Rediscovered | Access |
Family: Laomediidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Naushonia macginitiei | Glassell, 1938 | - | (rediscovered) | North America | Rediscovered | Access |
Family: Leucosiidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Orientotlos iishibai | Sakai, 1980 | (rediscovered) | Japan & Taiwan | Rediscovered | Access |
Family: Macrophthalmidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Macrophthalmus laevis | A. Milne Edwards, 1867 | - | (rediscovered) | Arabian Sea | Rediscovered | Access |
| Macrophthalmus malaccensis | Tweedie, 1937 | - | (rediscovered) | Malaysia | Rediscovered | Access |
Family: Majidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Leptomithrax sinensis | Rathbun, 1916 | - | (rediscovered) | Japan & Taiwan | Rediscovered | Access |
Family: Munidopsidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Munidopsis petalorhyncha | Baba, 2005 | - | (rediscovered) | Japan | Rediscovered | Access |
Family: Nematocarcinidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Nematocarcinus longirostris | Spence Bate, 1888 | - | (rediscovered) | Japan | Rediscovered | Access |
Family: Ocypodidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Gelasimus minor | Owen, 1839 | - | ? | Hawaiian Islands, USA | Invalid (synonym) | Access |
Family: Paguridae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Micropagurus acantholepis | (Stimpson, 1858) | - | (rediscovered) | South Pacific Ocean | Rediscovered | Access |
| Pagurus imaii | (Yokoya, 1939) | - | (rediscovered) | Hokkaido, Japan | Rediscovered | Access |
| Pagurus spinulentus | (Henderson, 1888) | - | (rediscovered) | Philippines | Rediscovered | Access |
Family: Palaemonidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Cryphiops luscus | (Holthuis, 1973) | - | 1986 | Chiapas, Mexico | Extinct | Access |
| Leandrites stenopus | Holthuis, 1950 | - | (rediscovered) | Queensland, Australia & Indonesia | Rediscovered | Access |
| Macrobrachium denticulatum | Ostrovski, Da Fonseca & Da Silva-Ferreira, 1996 | - | 1995 | Brazil | Extinct | Access |
| Macrobrachium hirtimanus | Olivier, 1811 | Betangue prawn | 1980 or later | Mascarene Islands | Extinct | Access |
| Macrobrachium leptodactylus | (de Man, 1892) | - | 1888 | Java, Indonesia | Extinct | Access |
| Macrobrachium oxyphilus | P.K.L. Ng, 1992 | - | 1991 | Peninsula Malaysia | Extinct | Access |
| Macrobrachium purpureamanus | Wowor, 1999 | - | 1998 | Kundur Island, Riau Archipelago, Indonesia | Extinct | Access |
| Macrobrachium scorteccii | Maccagno, 1961 | - | 1957 | Cal Galloan spring, Somalia (northern) | Extinct | Access |
| Palaemonetes cummingi | Chace, 1954 | Squirrel Chimney cave shrimp, Florida cave shrimp | 1973 | Squirrel Chimney, Alachua County, Florida, USA | Extinct | Access |
| Philarius lifuensis | (Borradaile, 1898) | - | (rediscovered) | Great Barrier Reef, Australia & Loyalty Islands, New Caledonia | Rediscovered | Access |
Family: Palinuridae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Puerulus carinatus | Borradaile, 1910 | Red whip lobster | (rediscovered) | Indian Ocean | Rediscovered | Access |
Family: Parastacidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Cherax urospinosus | Riek, 1969 | 1971 or before | Queensland, Australia | Missing | Access | |
|
Ombrastacoides parvicaudatus
|
Hansen & Richardson, 2006 | Short-tailed rain crayfish | (rediscovered) | King River valley, Tasmania, Australia | Rediscovered | Access |
Family: Pilumnidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Aniptumnus quadridentatus | (De Man, 1895) | (rediscovered) | Indonesia | Rediscovered | Access | |
| Camptoplax coppingeri | Miers, 1884 | - | (rediscovered) | Coral Sea & Torres Strait | Rediscovered | Access |
| Lophopilumnus cristipes | Calman, 1900 | - | (rediscovered) | Australia | Rediscovered | Access |
| Lophopilumnus dilatipes | (Adams & White, 1849) | - | (rediscovered) | Philippines | Rediscovered | Access |
| Lophoplax sculpta | Stimpson, 1858 | - | (rediscovered) | China to Japan | Rediscovered | Access |
Family: Pinnotheridae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Holothuriophilus tomentosus | (Ortmann, 1894) | - | (rediscovered) | Brazil | Rediscovered | Access |
| Holothuriophilus trapeziformis | Nauck, 1880 | - | (rediscovered) | Guerrero & Sinaloa, Mexico | Rediscovered | Access |
Family: Porcellanidae (Porcelain Crabs)
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Pachycheles velerae | Haig, 1960 | - | (rediscovered) | Cocos Island, Costa Rica & Galápagos Islands | Rediscovered | Access |
Family: Portunidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Portunus nipponensis | (Sakai, 1938) | - | (rediscovered) | Japan | Rediscovered | Access |
| Caphyra bedoti | Zehntner, 1894 | - | (rediscovered) | Socotra Island, Republic of Yemen | Rediscovered | Access |
Family: Potamonautidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Afrithelphusa afzelii | (Colosi, 1924) | Afzelius's crab | (rediscovered) | Sierra Leone | Rediscovered | Access |
| Afrithelphusa leonensis | (Cumberlidge, 1987) | Sierra Leone crab | (rediscovered) | Sierra Leone | Rediscovered | Access |
| Louisea balssi | (Bott, 1959) | - | (rediscovered) | Cameroon | Rediscovered | Access |
| Louisea edeaensis | (Bott, 1969) | - | (rediscovered) | Cameroon | Rediscovered | Access |
| Louisea yabassi | Mvogo Ndongo, von Rintelen & Cumberlidge, 2019 | (rediscovered) | Cameroon | Rediscovered | Access | |
| Potamonautes dubius | (Brito-Capello, 1864) | - | 1890 | Cunene (=Kunene) River, Angola & Namibia | Extinct | Access |
Family: Processidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Processa affinis | Hayashi, 1975 | - | (rediscovered) | Indonesia & Japan | Rediscovered | Access |
Family: Pseudothelphusidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Strengeriana antioquensis | Von Prahl, 1987 | - | ? | Antioquia Department, Colombia | Extinct | Access |
| Tehuana veracruzana | Rodriguez & Smalley, 1969 | - | ? | Veracruz state, Mexico | Extinct | Access |
Family: Raninidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Notopoides latus | Henderson, 1888 | (rediscovered) | Indo-Pacific | Rediscovered | Access | |
| Ranina propinqua | Ristori, 1891 | - | Late Pleistocene | Italy | Extinct | Access |
Family: Sesarmidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Neosarmatium malabaricum | (Henderson, 1893) | - | (rediscovered) | Malabar, India | Rediscovered | Access |
Family: Stenopodidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Odontozona addaia | Pretus, 1990 | (rediscovered) | Mediterranean | Rediscovered | Access |
Family: Stylodactylidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Stylodactylus discissipes | Bate, 1888 | (rediscovered) | Austral Islands (French Polynesia), Kermadec Islands (New Zealand) & New Caledonia | Rediscovered | Access |
Family: Thoridae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Lebbeus longidactylus | (Kobjakova, 1936) | - | (rediscovered) | Nemuro Strait, Sea of Okhotsk | Rediscovered | Access |
| Thor marguitae | Bruce, 1978 | - | (rediscovered) | Heron Island, Queensland, Australia & Ryuku Islands, Japan | Rediscovered | Access |
Family: Upogebiidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Upogebia imperfecta | K. Sakai, 1982 | - | (rediscovered) | Japan | Rediscovered | Access |
Family: Xanthidae (Pebble Crabs or Rubble Crabs)
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Guinotellus melvillensis | Serène, 1971 | - | (rediscovered) | Philippines | Rediscovered | Access |
Order: Euphausiacea
–No subordinate taxa
Superorder: Peracarida
Order: Amphipoda
Family: Ampeliscidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Ampelisca acinaces | Stebbing, 1888 | - | (rediscovered) | Australia | Rediscovered | Access |
| Ampelisca australis | Haswell, 1879 | - | (rediscovered) | New South Wales, Australia | Rediscovered | Access |
Family: Aristiidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Aristias megalops | Sars, 1895 | - | (rediscovered) | Norway | Rediscovered | Access |
Family: Crangonyctidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Bactrurus cellulanus | Koenemann & Holsinger, 2001 | Solitary amphipod | 1963 | Monroe County, Indiana, USA | Extinct | Access |
| Stygobromus lucifugus | Hay, 1882 | Rubious Cave amphipod | 1882 | Illinois, USA | Extinct or invalid | Access |
Family: Cyamidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Cyamus rhytinae | (J.F. Brandt, 1846) | pre-1769 | Bering Sea | Missing if valid | Access |
Family: Gammaridae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Rhipidogammarus rheophilus | Stock & Sànchez, 1990 | - | ? | Tenerife, Canary Islands | Missing | Access |
Family: Ingolfiellidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Ingolfiella longipes | Stock, Sket & Iliffe, 1987 | - | 1978 | Walsingham Sink Cave, Hamilton Parish, Bermuda | Extinct | Access |
Family: Niphargidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Niphargus enslini | Karaman, 1932 | (rediscovered) | southern Germany | Rediscovered | Access |
Family: Paramelitidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Austrogammarus australis | (Sayce, 1901) | Dandenong freshwater amphipod, Sherbrooke amphipod | (rediscovered) | Dandenong Mountain Range, Victoria, Australia | Rediscovered | Access |
| Hurleya sp. nov. 'Yanchep National Park' | - | Crystal Cave Crangonyctoid | ? | Yanchep National Park, Western Australia, Australia | Missing | Access |
Order: Bochusacea
–No subordinate taxa
Order: Cumacea
Family: Nannastacidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Marmacuma samimei | Artüz & Sakınç, 2020 | Late Pleistocene | Sea of Marmara, Turkey | Missing | Access |
Order: Ingolfiellida
–No subordinate taxa
Order: Isopoda
Family: Amphisophidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Phreatomerus latipes | (Chilton, 1922) | - | ? | Lake Eyre GAB Mound Springs, central Australia | Missing | Access |
Family: Armadillidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| †Hawaiodillo danae | (Dollfus, 1900) | Dana's Hawaiian woodlouse | ? | Kauai, Hawaiian Islands, USA | Extinct | Access |
| †Hawaiodillo perkinsi | (Dollfus, 1900) | Perkins's Hawaiian woodlouse | ? | Maui, Hawaiian Islands, USA | Extinct | Access |
| †Hawaiodillo sharpi | (Dollfus, 1900) | Sharp's Hawaiian woodlouse | ? | Kauai, Hawaiian Islands, USA | Extinct | Access |
| Spherillo albospinosus | (Dollfus, 1900) | White-spined Hawaiian woodlouse | ? | Oahu, Hawaiian Islands, USA | Extinct | Access |
| Spherillo carinulatus | Budde-Lund, 1904 | Carinulate Hawaiian woodlouse | ? | Kauai, Hawaiian Islands, USA | Extinct | Access |
| Spherillo misellus | Budde-Lund, 1885 | Schayer's slater | January 1843 or before | Tasmania, Australia | Extinct | Access |
Family: Asellidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Asellus tomalensis | Harford, 1877 | - | (rediscovered) | California & Oregon, USA | Rediscovered | Access |
| Caecidotea nickajackensis | Cope & Packard, 1881 | Nickajack Cave isopod | (rediscovered) | Nickajack Cave, Marion County, Tennessee, USA | Rediscovered | Access |
Family: Bopyridae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Parabopyrella thomasi | (Nierstrasz & Brender à Brandis, 1929) | - | (rediscovered) | Caribbean | Rediscovered | Access |
Family: Cirolanidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Sphaeromides virei montenigrina | Sket, 1957 | - | (rediscovered) | Montenegro | Rediscovered | Access |
Family: Cymothoidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Cymothoa ianuarii | Schioedte & Meinert, 1884 | (rediscovered) | São Paulo, Brazil | Rediscovered | Access |
Family: Entoniscidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Entoniscus creplinii | Giard & Bonnier, 1887 | (rediscovered) | Brazil & USA (Florida & North Carolina) | Rediscovered | Access |
Family: Hypsimetopidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Hyperoedesipus plumosus | Nicholls & Milner, 1923 | - | (rediscovered) | Western Australia, Australia | Rediscovered | Access |
| Hypsimetopus intrusor | Sayce, 1902 | - | pre-1903 | near Zeehan, Tasmania (western), Australia | Extinct | Access |
Family: Phreatoicidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Crenoicus mixtus | Nicholls, 1944 | - | 24 May 1974 or later | Dividing Range, Victoria, Australia | Extinct | Access |
Family: Protognathiidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Protognathia bathypelagica | Schultz, 1977 | - | (rediscovered) | Weddell Sea, Antarctica | Rediscovered | Access |
Family: Sphaeromatidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Thermosphaeroma thermophilum | Richardson, 1897 | Socorro isopod | - | Mexico & New Mexico, USA | Extinct in the wild | Access |
Family: Trachelipodidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Trachelipus vespertilio | (Budde-Lund, 1896) | (rediscovered) | Croatia & Slovenia | Rediscovered | Access |
Order: Lophogastrida
–No subordinate taxa
Order: Mictacea
–No subordinate taxa
Order: Mysida
Family: Mysidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Amblyops magnus | Birstein & Tchindonova, 1958 | - | (rediscovered) | Japan & Marianas Trench | Rediscovered | Access |
Family: Petalophthalmidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Hansenomysis lucifugus | (Faxon, 1893) | - | (rediscovered) | Galapagos Islands & Mexico | Relocated | Access |
Order: Spelaeogriphacea
–No subordinate taxa
Order: Stygiomysida
–No subordinate taxa
Order: Tanaidacea
Family: Leptocheliidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Chondrochelia savignyi | (Krøyer, 1842) | - | (rediscovered) | Madeira, Atlantic Ocean | Rediscovered | Access |
Family: Pagurapseudidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Pagurapseudes dentatus | (Brown, 1956) | - | South Africa | Rediscovered | Access |
Order: Thermosbaenacea
–No subordinate taxa
Superorder: Syncarida
Order: Anaspidacea
–No subordinate taxa
Order: Bathynellacea
–No subordinate taxa
Order: Palaeocaridacea
–No subordinate taxa
Subclass: Hoplocarida
Order: Stomatopoda (Mantis Shrimps)
–No subordinate taxa
Subclass: Phyllocarida
Order: Leptostraca
Family: Nebaliidae
–No subordinate taxa
Family: Nebaliopsididae
–No subordinate taxa
Family: Paranebaliidae
–No subordinate taxa
Class: incertae sedis (ichnospecies)
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Palaxius floridanus | Gischler, Blau & Peckmann, 2017 | - | c.80ka | Florida, USA | Extinct | Access |