Figure 2: A- Hermann Julius Kolbe (1855–1939), a German entomologist from Halle, Westphalia. He was curator at the Berlin Zoological Museum from 1890 until 1921 specialising in Coleoptera, Psocoptera and Neuroptera. B- Fossil insect trace in silicified wood from Sahel Alma. C- Professor Aftim Acra (1922–2007), with his well-known collection from the outcrop of Jouar Es-Souss (Bkassine).