Tydeoid mites (Acari : Tydeidae, Edbakerellidae, Iolinidae) occurring on citrus in Southern Africa

摘要

Tydeoids were collected from different southern African localities by beating citrus foliage and branches. Pronematus ubiquitus (McGregor) was the most frequently encountered, followed by Tydeus munsteri Meyer and Ryke. Some species appeared to be restricted to certain climate types, e. g. Parapronematus geminus Meyer and Rodriques being found only in coastal conditions of Mozambique and Triophtydeus immanis Kuznetzov only occurring in the arid lower Orange River Valley. Four new genera (Tetratriophtydeus, Orfareptydeus, Kakamasia, and Lourus) are proposed along with four new species (O. stepheni, K. cataracta, Pseudopronematulus augrabiensis, and L. citricolus). A key is presented and has been created to facilitate the identification of the tydeoids found and to encourage further research on the role of tydeoids in the citrus ecosystem in southern Africa.