The Commission has ruled that all previous type species fixations for the nominal genus Tydeus Koch, 1836 are set aside and Tydeus spathulatus Oudemans, 1928 is designated as the type species.
Tydeus Koch, 1836 (Arachnida, Acari): Tydeus spathulatus Oudemans, 1928 designated as the type species," The Bulletin of Zoological Nomenclature 65(1), 68, (1 March 2008). https://doi.org/10.21805/bzn.v65i1.a14