Figure 1. Maximum species richness throughout the Early and Middle Triassic.

The Longobardian is palish to indicate that the decrease of species richness is not a primary signal. Light grey bars on top indicate the number of lithological units representing each time interval. In cases where information does not come from all lithological units representing the corresponding time interval, the actual number of lithological units from which information comes from is indicated by dark grey bars. Abbreviations: A, Aegean; B, Bithynian; D, Dienerian; Fassan, Fassanian; G, Griesbachian; I, Induan; Illyr, Illyrian; Longobard, Longobardian; Pel, Pelsonian; Smith, Smithian. Absolute ages according to Cohen et al., (2013, updated) and Ovtcharova et al. (2015). Information about the relative duration of substages come from Nawrocki & Szulc (2000), Götz, Szulc & Feist-Burkhardt (2005), Galfetti et al. (2007), Ovtcharova et al. (2006) and Widmann et al. (2020). Symbols for ecological guilds redrawn after Aberhan (1994). See text for further explanation.