Symbioribates Aoki 1966

Key to known species of Symbioribates 1. Sexual dimorphism in morphology of rostral seta absent; head of bothridial seta not covered by anterior margin of notogaster or covered partially (up to one third); rostrum tripartite; sejugal apodeme directed to posterior half of genital plate; distance between adanal setae ad 1 – ad 2 equal to ad 2 – ad 3; body length: 270–285................. Symbioribates tripartitus sp. nov. - Sexual dimorphism in morphology of rostral seta present (thick in male versus setiform in female); head of bothridial seta completely or partially (up to half) covered by anterior margin of notogaster; rostrum rounded or truncate; sejugal apodeme directed to anterior half or middle of genital plate; distance between adanal setae ad 1 – ad 2 shorter than ad 2 – ad 3........... 2Published as part of Ermilov, Sergey G., Salavatulin, Vladimir M. & Kolesnikov, Vasiliy B., 2023, Contribution to knowledge of the oribatid mite genus Symbioribates (Acari, Oribatida, Symbioribatidae), with descriptions of two new arboreal species from Vietnam, pp. 556-570 in Zootaxa 5325 (4) on page 568, DOI: 10.11646/zootaxa.5325.4.6, http://zenodo.org/record/824373