“…In Brazil, paleontological studies in Silurian-Devonian rocks are numerous; however, in the Amazonas Basin, these investigations are few and based mainly on subsurface data, particularly for palynological surveys (a historical review is given in Grahn 1992), while surface ones are related to ichnology (Nogueira et al 1999, Matsuda et al 2010, Gonçalves et al 2017. Grahn and Melo (2003) presented the chitinozoan taxonomy and biostratigraphy in outcrops along the Urubu, Uatumã and Abacate rivers, in Amazonas State.…”