{"key":"b439057f-04f9-4e16-9519-3812e3ef2c9d","installationKey":"d5b61ace-f25c-43bd-9dd0-03486850f90b","publishingOrganizationKey":"750a8724-fa66-4c27-b645-bd58ac5ee010","doi":"10.3897/bdj.14.e194689","external":false,"numConstituents":0,"type":"CHECKLIST","title":"First report of two Eriophyid mite genera (Acariformes, Eriophyidae) from Saudi Arabia with description of a new species and a key to known Cosetacus species","description":"<p>Two eriophyoid mite genera, Cosetacus Keifer and Neserella Meyer &amp; Ueckermann, are reported for the first time in Saudi Arabia (SA). A new species, Cosetacus javanicus sp. nov., is described and illustrated, based on the female specimens. Two species, Cecidophyopsis vermiformis (Nalepa) and Neserella capreifoliae Meyer &amp; Ueckermann, are newly recorded for the eriophyid mite fauna of SA. In addition, a key to known species of Cosetacus is provided.Two eriophyid mite genera, Cosetacus Keifer and Neserella Meyer &amp; Ueckermann (Acariformes, Eriophyidae, Cecidophyinae) are herein recorded for the first time from Saudi Arabia (SA), with a new species, C. javanicus sp. nov., collected from Aerva javanica (Burm. f.) (Amaranthaceae). Moreover, two species, Cecidophyopsis vermiformis (Nalepa) collected from Conocarpus erectus (Combretaceae R. Br.), and Neserella capreifoliae Meyer &amp; Ueckermann collected from Ficus carica (Moraceae Link), are reported as new records for the eriophyoid mite fauna of SA. The individuals of these species are vagrants on the abaxial leaf surface, causing no apparent symptoms to the host plant species. Additionally, a key to known species of Cosetacus is provided.</p>","language":"eng","homepage":"https://doi.org/10.3897/BDJ.14.e194689","citation":{"text":"Alatawi F (2026). First report of two Eriophyid mite genera (Acariformes, Eriophyidae) from Saudi Arabia with description of a new species and a key to known Cosetacus species. Biodiversity Data Journal. 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