Figure 1

Hypotheses concerning the phylogenetic position of Tricholepidion gertschi. a) the position of Lepidotrichidae remained unclear after analysis of cephalic characters [11, 14] and characters of the whole body with a focus on attachment structures [13], b) Lepidotrichidae as the sistergroup to all remaining Dicondylia was hypothesized by Kristensen [15] and Stys & Zrzavý [16], c) T. gertschi as the sistergroup to the remaining Zygentoma, with unclear resolution of †L. pilifera, was hypothesized by Koch [17] and Engel [18], d) Lepidotrichidae as closely related to Nicoletiidae (+ Ateluridae) within Zygentoma was hypothesized by Wygodzinsky [10] and is supported by sperm characters according to Dallai et al. [19].