Fig. 2From: The swimming trace Undichna from the latest Devonian Hangenberg Sandstone equivalent of MoroccoA Late Paleozoic stratigraphy subdivision of the South Tafilalt region, adapted from Álvaro et al. (2014) and Najih (2019); see more information on the log there. B Lithological section from the Al Atrous region with the stratigraphic position of ichnofossil-bearing strataBack to article page