Paleogeographic map of Europe during the early to middle Eocene. Yellow areas indicate the position of the present-day amber Lagerstätten at Bitterfeld, Gdansk and Rovno. Modified after Popov et al. 2004, Denk and Grimm 2009, Blakey 2011, Szwedo and Sontag 2013, and Wolfe et al. 2016.

 
 
  Part of: Dunlop JA, Kotthoff U, Hammel JU, Ahrens J, Harms D (2018) Arachnids in Bitterfeld amber: A unique fauna of fossils from the heart of Europe or simply old friends? Evolutionary Systematics 2: 31-44. https://doi.org/10.3897/evolsyst.2.22581