Fig. 1 in A general definition of the term "plastron" in terrestrial and aquatic arthropods

Fig. 1 Different aspects of the epicuticular structure of selected collembolan species. (a–c1) Entomobrya muscorum (Nicolet, 1842) (Arthropleona: Entomobryidae): Habitus dorsal (a), lateral (b) and the typical hexagonal microtubercle structure of the furca (c1). (c2) Arthropleona (©Borensztajn 2001): Higher resolution (bar 1 μm) of the hexagonal microtubercle structure (note the occasional pentagonal and septagonal aberrations). d–f Tetrodontophora bielanensis (Waga, 1842) (Arthropleona: Onychiuridae): Habitus dorsal (d), lateral (e) and formation of thoracal macrotubercles that are generated from fused tetragonal microtubercle structures (f). g–i Allacma fusca (Linnaeus, 1758) (Symphypleona: Sminthuridae): Habitus dorsal (g), lateral (h) and fusion of the abdominal hexagonal microtubercles to protuberances (i)