One new species of the subgenus Cosmogalumna (Acari: Oribatida: Galumnidae: Galumna) from Japan with supplementary description of Galumna (Cosmogalumna) ornata Aoki, 1988
The present work deals with two members of the oribatid mite subgenus Galumna (Cosmogalumna) Aoki, 1988 from Japan. A new species, G. (C.) centroclathrata n. sp. is morphologically most similar to G. (C.) praeoccupata Subías, 2004 from China; however it differs from it by conspicuous granular ornamentation on the surface of the pteromorph, the shape of the polygonal sculpture on the notogaster, and a conspicuous linear sculpture on the middle part of the genital plates. Galumna (Cosmogalumna) ornata Aoki, 1988, the type species of the subgenus, is additionally described based on the specimens from the type locality. The position of lamellar setae slightly anteriad to L lines and the presence of 10 pairs of minute notogastral setae should be considered in any future identification of G. (C.) ornata.