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

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 & 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 & 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 & Ueckermann collected from Ficus carica (Moraceae Link), are reported as new records for the eriophyoid mite fauna of SA.