New classification of the family Sejidae (Acari : Mesostigmata) based on morphological analyses

Relationships in the family Sejidae are examined based on analysis of 74 morphological characters. Synonymy of Willmannia Balogh and Liroaspis Banks with Sejus Koch is supported, while synonymy of Epicroseius Berlese is not. Nine species of Sejus are transferred to Epicroseius, and Sejus congoensis and S. solaris are transferred to Africasejus n. gen. A total of five genera is recognized in Sejidae: Sejus, Epicroseius, Adenosejus Lekveishvili and Krantz, Africasejus, and Zuluacarus Tragardh. New diagnoses are proposed for the family and its genera.