Chelicerata (Spiders, Sea Spiders, Scorpions, Mites, Ticks etc.)
NB: The higher level taxonomy followed here is out of date.
† Denotes that the entire taxonomic rank (viz. genus or higher) is extinct, or at least probably so.
Class: Arachnida (Spiders, Scorpions, Mites, Ticks etc.)
Order: Acari (Mites and Ticks)
Family: Achipteriidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Achipteria setulosa | Golosova, 1981 | - | - | Japan | Rediscovered | Access |
Family: Analgidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Diplaegidia gladiator | Haller, 1882 | Passenger pigeon mite | Before 1915 | North America | Extinct | Access |
Family: Ascidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Proctolaelaps epuraeae | (Hirschmann in Westerboer, 1963:374) | (rediscovered) | Western Siberia, Russia | Rediscovered | Access |
Family: Caudiferidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Compressalges nipponiae | Dubinin, 1950 | Japanese crested ibis parasitic mite | ? | Japan (& China?) | Extinct | Access |
Family: Digamasellidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Dendrolaelaps sinodendronis | Wiśniewski & Hirschmann, 1989 | (rediscovered) | Western Siberia, Russia | Rediscovered | Access |
Family: Erythraeidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Callidosoma dasypodiae | (Womersley, 1934) | - | - | Australia? | Rediscovered | Access |
Family: Gabuciniidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Coraciacarus muellermotzfeldi |
Dabert & Alberti, 2008 | Huia mite | 1879 | New Zealand | Extinct | Access |
| Hieracolichus hirundo | (Mégnin & Trouessart, 1884) | - | - | Americas | Rediscovered | Access |
Family: Gymnodamaeidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Arthrodamaeus rossicus | (Bulanova-Zachvatkina, 1967) | - | - | Russia | Rediscovered | Access |
Family: Halarachnidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Halarachne americana | Banks, 1899 | Caribbean monk seal nasal mite | 1899 or before | Caribbean waters | Extinct | Access |
Family: Holothyridae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Dicrogonatus gardineri | Warburton, 1912 | Gardiner's giant mite | 1909 | Mahé, Seychelles | Extinct | Access |
Family: Hygrobatidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Atractides circumcinctus | Schwoerbel, 1956 | - | - | Baden-Württemberg, Germany | Rediscovered | Access |
Family: Ixodidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Dermacentor raskemensis | Pomerantzev, 1946 | (rediscovered) | Afghanistan, China, Iran, Pakistan & Turkey | "Rediscovered" | Access | |
| Haemaphysalis kopetdaghica | (Kerbabaev, 1962) | (rediscovered) | Iran, Tajikistan, Turkey & Turkmenistan | "Rediscovered" | Access | |
| Ixodes nitens | Neumann, 1904 | - | ? | Christmas Islands, Australia | Extinct | Access |
Family: Laelapidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Cosmolaelaps lignicolus | (G. & R. Canestrini, 1882) | - | - | Italy | Rediscovered | Access |
| Gaeolaelaps dailingensis | (Ma & Yin, 1998) | China & Far East Russia | Rediscovered | Access | ||
| Gaeolaelaps longichaetus | (Ma) | - | China & Far East Russia | Rediscovered | Access |
Family: Otopheidomenidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Prasadiseius cocytes | (Prasad, 1970) | - | - | South America | Rediscovered | Access |
Family: Phytoseiidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Silvaseius barretoae | (Yoshida-Shaul and Chant, 1991) | - | - | Argentina & Brazil | Rediscovered | Access |
Family: Psoroptoididae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Chiasmalges carolinensis | Mironov, Dabert & Ehrnsberger, 2005 | - | Pre-1869 | North America | Extinct | Access |
Family: Pterolichidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Genoprotolichus simplex | Mironov, Dabert & Ehrnsberger, 2005 | - | Pre-1869 | North America | Extinct | Access |
| Lopharalichus beckeri | Mironov, Dabert & Ehrnsberger, 2005 | - | Pre-1869 | North America | Extinct | Access |
| Neorhytidelasma conuropsis | Mironov, Dabert & Ehrnsberger, 2005 | - | Pre-1869 | North America | Extinct | Access |
Family: Pteronyssidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Pterotrogus principalis | Mironov, Dabert & Ehrnsberger, 2005 | - | Pre-1944 | North America | Extinct | Access |
Family: Tetranychidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Tenuipalponychus tabebuiae | (Flechtmann, 1971) | (rediscovered) | Brazil & Costa Rica | Rediscovered | Access | |
| Tetranychus gigas | Pritchard & Baker, 1955 | - | (rediscovered) | Brazil & USA | Rediscovered | Access |
Family: Thermacaridae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Thermacarus nevadensis | Marshall, 1928 | Nevada water mite | ? | Nevada (& Utah?), USA | ? | Access |
Family Xolalgidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Fainalges gracilitarsus | Mironov, Dabert & Ehrnsberger, 2005 | Carolina parakeet feather mite | Before 1869 | North America | Extinct | |
| Protonyssus proctorae | Mironov, Dabert & Ehrnsberger, 2005 | - | Before 1869 | North America | Extinct | Access |
Order: Amblypygi/Pedipalpia (Whip Scorpions or Whip Spiders)
—No subordinate taxa
Order: Araneae (True Spiders)
Family: Araneidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Sedasta ferox | Simon, 1894 | (rediscovered) | West Africa | Rediscovered | Access |
Family: Atracidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Hadronyche pulvinator | (Hickman, 1927) | Cascade funnel-web spider | 1926 or later | Cascades area, Tasmania, Australia | Extinct | Access |
Family: Barychelidae (Brushed Trapdoor Spiders)
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Idioctis intertidalis | (Benoit & Legendre, 1968) | - | 1999 | Madagascar, Grand Comore & Seychelles | Missing | Access |
Family: Corinnidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Paccius quadridentatus | Simon, 1898 | - | 1892 | Mahé, Seychelles | Extinct | Access |
Family: Dysderidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Dysdera sp. nov. 'Pico' | - | - | 1950's | Pico Island, Azores | Extinct | Access |
Family: Euctenizidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Aptostichus killerdana | Bond, 2012 | Killerdana trapdoor spider | 15 February 1971 | Orange County, California, USA | Extinct | Access |
| Aptostichus lucerne | Bond, 2012 | Deadman’s trapdoor spider | 25 October 1957 | San Bernardino County, California, USA | Extinct | Access |
Family: Eutichuridae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Cheiracanthium wilma | Benoit, 1977 | - | ? | St. Helena | Extinct? | Access |
Family: Gnaphosidae (Ground spiders)
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Benoitodes caheni | (Benoit, 1977) | - | ? | St. Helena | Extinct | Access |
Family: Hexathelidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Plesiothele fentoni | Hickman, 1936 | Lake Fenton trapdoor spider | - | Tasmania, Australia | Rediscovered | Access |
Family: Linyphiidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Orsonwelles torosus | (Simon, 1900) | Waimea sheet weaver | 1890's | Kauai, Hawaiian Islands, USA | Extinct | Access |
Family: Liphistiidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Liphistius birmanicus | Thorell, 1897 | - | - | Myanmar (=Burma) | Rediscovered | Access |
| Liphistius lordae | Platnick & Sedgwick, 1984 | - | - | Myanmar (=Burma) | Rediscovered | Access |
Family: Lycosidae (Wolf spiders)
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Hogna biscoitoi | Wunderlich, 1992 | Biscoito wolf spider | ? | Porto Santo, Madeira | Extinct | Access |
Family: Migidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Migas nitens | Hickman, 1927 | - | - | Tasmania, Australia | Rediscovered | Access |
Family: Miturgidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Voraptus tenellus | (Simon, 1893) | - | 1972 | Mahé & Silhouette, Seychelles | Extinct | Access |
Family: Nemesiidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Nemesia arboricola | Pocock, 1903 | - | - | Malta | Rediscovered | Access |
Family: Ochyroceratidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Euso muehlenbergi | (Saaristo, 1998) | - | 1975 | Grande Soeur & Petite Soeur islands, Seychelles | Extinct | Access |
Family: Oonopidae (Goblin spiders)
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Gamasomorpha austera | Simon, 1898 | - | 1892 | Mahé, Seychelles | Extinct | Access |
Family: Palpimanidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Steriphopus lacertosus | Simon, 1898 | - | 1892 | Mahé, Seychelles | Extinct | Access |
Family: Pisauridae (Water Spiders)
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Nilus kochi | Roewer, 1951 | - | - | Queensland, Australia | Rediscovered | Access |
Family: Salticidae (Jumping Spiders)
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Chrysilla volupe | (Karsch, 1879) | - | - | India | Rediscovered | Access |
| Maratus nigromaculatus | (Keyserling, 1883) | - | - | Queensland, Australia | Rediscovered | Access |
| Myrmarachne melanocephala | MacLeay, 1839 | - | - | Asia (southern) | Rediscovered | Access |
| Piranthus decorus | Thorell, 1895 | - | India & Myanmar (=Burma) | Rediscovered | Access |
Family: Sparassidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| †Pleorotus braueri | Simon, 1898 | - | 1894 | Mahé, Seychelles | Extinct | Access |
| Stipax triangulifer | Simon, 1898 | - | 1894 | Mahé, Seychelles | Extinct | Access |
| Thomasettia seychellana | Hirst, 1911 | - | 1908 | Mahé & Silhouette, Seychelles | Extinct | Access |
Family: Telemidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Seychellia lodoiceae | Brignoli, 1980 | - | 1972 | Praslin Island, Seychelles | Extinct | Access |
Family: Tetragnathidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Tetragnatha paschae | Berland, 1924 | Rapa Nui long-jawed spider | ? | Rapa Nui (=Easter Island) | Extinct | Access |
Family: Theraphosidae (Tiger Tarantulas)
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Nesiergus gardineri | (Hirst, 1911) | - | 1974 | Seychelles | Extinct | Access |
| Nesiergus halophilus | Benoit, 1978 | - | 1972 | Seychelles | Extinct | Access |
| Poecilotheria metallica | Pocock, 1899 | - | - | Andhra Pradesh, India | Rediscovered | Access |
Family: Theridiidae (Cobweb spiders)
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Moneta coercervea | (Roberts, 1978) | - | 1972 | Mahé & Silhouette, Seychelles | Extinct | Access |
Family: Thomisidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Bonapruncinia sanctaehelenae | Benoit, 1977 | - | 1967 | St. Helena | Extinct | Access |
Family: Zoropsidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Tengella perfuga | Dahl, 1901 | - | - | Nicaragua | Rediscovered | Access |
Order: Opiliones/Phalangida (harvestmen)
Family: Biantidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Biantes parvulus | (Hirst, 1911) | - | 1972 | Mahé, Praslin & Silhouette islands, Seychelles | Extinct | Access |
Family: Cosmetidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Eulibitia ectroxantha | (Mello-Leitão, 1941) | - | Colombia | Rediscovered | Access |
Family: Epedanidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Lobonychium palpiplus | Roewer, 1938 | - | - | Borneo (Indonesian & Malaysian) | Rediscovered | Access |
Family: Otilioleptidae
—No subordinate taxa
Family: Phalangodidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Hirstienus nanus | Hirst, 1913 | - | 1908 | Mahé, Seychelles | Extinct | Access |
Family: Podoctidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Centrobunus braueri | Loman, 1902 | - | 1894 | Mahé Island, Seychelles | Extinct | Access |
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| Holozoster ovalis |
Loman, 1902 |
- | 1972 | Mahé, Seychelles | Extinct | Access |
| Ibalonius lomani | Hirst, 1911 | - | 1972 | Silhouette, Seychelles | Extinct | Access |
| Sitalcicus gardineri | (Hirst, 1911) | - | 1908 | Mahé, Seychelles | Extinct | Access |
| Sitalcicus incertus | Rambla, 1984 "1983" | - | 1972 | Silhouette, Seychelles | Extinct | Access |
Family: Samoidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Mitraceras crassipalpum | Loman, 1902 | - | 1972 | Mahé, Seychelles | Extinct | Access |
Family: Triaenonychidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Prasmiola unica | Forster, 1954 | - | (rediscovered) | Days Bay, Wellington, North Island, New Zealand | Rediscovered | Access |
Family: Zalmoxidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Metazalmoxis ferruginea | Roewer, 1912 | - | 1892 | Mahé, Seychelles | Extinct | Access |
Order: Palpigradi (Palpigrades or Microwhip Scorpions)
Family: Eukoeneniidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Eukoenenia draco | (Peyerimhoff, 1906) | - | - | Majorca | Rediscovered | Access |
Order: Pseudoscorpionida (False Scorpions or Book Scorpions)
Family: Garypinidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Hemisolinus helenae | Beier, 1977 | - | >1966 / <2004 | St. Helena | Extinct | Access |
Family: Geogarypidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Afrogarypus seychellesensis | (Beier, 1940) | - | 1940 | Praslin Island, Seychelles | Extinct | Access |
Order: Ricinulei (Hooded Tickspiders)
—No subordinate taxa
Order: Schizomida (Short-tailed Whip Scorpions)
Family: Hubbardiidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Surazomus chavin | Pinto-da-Rocha, 1996 | Peruvian short-tailed whip scorpion | - | Panguana, Dept. Huanuco, Peru | Rediscovered | Access |
Order: Scorpiones/Scorpionida (scorpions)
Family: Buthidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Tityus exstinctus | Lourenço, 1995:29 | Martinique tityus scorpion | 1884 | Martinique, Lesser Antilles | Extinct | Access |
Family: Scorpionidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Orobothriurus bivittatus | (Thorell, 1877) | - | - | Sierra del Tontal, Argentina | Invalid (synonym) | Access |
Family: †Typhlochactinae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| †Akrav israchanani | Levy, 2007 | Eyeless cave scorpion | Early 1990s? | Ayalon cave, Israel | Extinct | Access |
Order: Solifugae (Solifuges or Camel Spiders)
—No subordinate taxa
Class: Pycnogonida (sea spiders)
Order: Pantopoda
Family: Nymphonidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Nymphon gerlachei | Giltay, 1935 | (rediscovered) | Antarctic | Rediscovered | Access |
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Appendix 1: Taxa not recorded since the type collection
Andre, H. M. and Ducarme, X. (2003). Rediscovery of the genus Pseudotydeus (Acari: Tydeoidea), with description of the adult using digital imaging. Insect Systematics & Evolution 34(4): 373-379. [Pseudotydeus perplexus: "The type-material...from old lawn clippings collected from Columbus (Ohio, USA)."]