Name and classification
Tydeus Koch, 1836
Note: There is no agreement on the year of the original description of Tydeus Koch. Most workers agree that the first description of Tydeus appeared in "Koch, C.L. Deutschlands Crustaceen, Myriapoden und Arachniden. Ein Beitrag zur deutschen Fauna, Heft 4 (=Heft 137)" (not seen by us). The most recent treatment cites the year as 1836 (André, 2005), with a discussion on publication date of Heft 4 - either 1836 or 1837 and the warrant that the year cannot be found on the author's personal reprint. Oudemans gives the same year for Heft 4 (Oudemans, 1937b). However, the Nomenclator Zoologicus online database indicates that Heft 4 had been published in 1837. Kaźmierski gives 1835 for Tydeus Koch, without explicitly citing the original Koch's work or any further discussion on the matter (Kaźmierski, 1989). Here we follow André, 2005 and André and Kaźmierski, 2006, citing the year of the original description of Tydeus as 1836.
Superorder Acariformes » Order Trombidiformes » Suborder Prostigmata » Infraorder Eupodina » Family Tydeidae » Genus Tydeus
Tydeus spathulatus Oudemans, 1928. Designated by Opinion 2190 ICZN (2008), see Case 3354 (André and Kaźmierski, 2006).
The complicated synonymy of this genus was discussed in André, 2005.