Fig. 5. Chaetotaxy of thoracic nota of Lepismatidae Latreille, 1802. A. Pronotum with setal collar (sc) of Psammolepisma schultzei (Silvestri, 1908), with lateral combs of macrochaetae (lc). Adapted from Irish (1988). Abbreviations: plc = posterolateral comb of macrochaetae, in this case inserted in a very lateral position of the posterior margin; pt = posterior trichobothrium, associated to the last lateral comb (N); the anterior trichobothrium is associated with the antepenultimate lateral comb (N–2). B. Pronotum with bare anterior margin of Neoasterolepisma balcanicum (Stach, 1922), without lateral combs of macrochaetae, only marginal setae (ms). Adapted from Molero-Baltanás et al. (1997). Abbreviations: ata = anterior open trichobothrial areas (the posterior ones are also open in this genus); ps = setulae associated with the posterior margin (in species of Tricholepisma these setae are transformed into macrochaetae: bigger and bifid apically). C. Micrograph of the left anterolateral corner of the pronotum of Allacrotelsa kraepelini, with 1+1 anterolateral groups of macrochaetae, marked with an arrow (and the remaining anterior margin bare). Scale bars = 0.2 mm.