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This article contains a list of extinct species from the class Arachnida, with the year and location that they were last recorded.
| Scientific name | Common name | Year last seen | Last known location |
|---|---|---|---|
| Centrobunus braueri | N/A | 1894 | Mahé, Seychelles[1] |
| Dicrogonatus gardineri | N/A | 1909 | Mahé, Seychelles[2] |
| Halarachne americana | Caribbean monk seal nasal mite | 1952 | Caribbean Sea |
| Hirstienus nanus | N/A | 1908 | Mahé, Seychelles[3] |
| Metazalmoxis ferruginea | N/A | 1892 | Mahé, Seychelles[4] |
| Peromona erinacea | N/A | 1892 | Mahé, Seychelles[5] |
| Pleorotus braueri | N/A | 1894 | Mahé, Seychelles[6] |
| Sitalcicus gardineri | N/A | 1908 | Mahé, Seychelles[7] |
| Stipax triangulifer | N/A | 1894 | Mahé, Seychelles[8] |
| Thomasettia seychellana | N/A | 1908 | Mahé, Seychelles and Silhouette Island[9] |
| Diplaegidia gladiator | Passenger pigeon mite | 1914 | North America[10][11] |
There are currently no known arachnids that are extinct in the wild yet still kept in captivity.[citation needed]