Size and distribution of bristles in the median part of tergites T6,7 in females (A–H) and males (I) of Attaphila species, phase contrast images. A: A. aptera, female (Bo 1257). B: A. bergi, female (Bo 1282). C: A. fungicola, female (Bo 1264). D: A. multisetosa, female (Bo 1270). E: A. paucisetosa, female (PT Bo 1255). F: A. schuppi, female (ST Bo 1237), with only short remnants of transversal ridge tr7. G: A. sexdentis, female (Bo 1233). H: A. sinuosocarinata, female (HT Bo 1273). I: A. aptera, male (Bo 1256). ― Abbreviations: T6-p, T7-p posterior borders of tergites T6, T7; tr6, tr7 transversal ridges of tergites T6, T7.