Genus Nannotanyderus Ansorge, 1994

Nannotanyderus comprises five species in addition to the one described herein: N. krzeminskii Ansorge, 1994 from the Toarcian of Grimmen and Dobbertin, Germany; N. grimmenensis Ansorge & Krzemiński, 2002 from the Toarcian of Grimmen;? N. incertus Lukashevich, 2011 from the Upper Jurassic of Shar-Teg, Mongolia (this is based on an incomplete wing assigned to the genus with some reservation by the original author); N. kubekovensis Skibińska & Krzemiński, 2013 from the Upper Jurassic of Karatau, Kazakhstan (in Skibińska & Krzemiński, 2013 the specimen locality was incorrectly stated as Kubekovo); and N. ansorgei Krzemiński et al., 2013 from Lower Cretaceous Lebanese amber. Members of this genus are distinguished by their tiny size, with a wing length of 2–4 mm. Moreover vein Sc does not extend beyond the mid–point of the wing and vein R2 is several times shorter than R2+3.

Type species. Nannotanyderus krzeminskii Ansorge, 1994; Lower Jurassic (Toarcian), Germany (Fig. 1).