“…The evidence for marine influence in Amazonia derives from the fossil record of molluscs (Wesselingh et al, 2006), foraminifera, dinoflagellates, ostracods (Boonstra et al, 2015;Gross, Ramos, & Piller, 2015;Jaramillo et al, 2017;Wesselingh & Ramos, 2010), mangrove pollen (Hoorn, 1993(Hoorn, , 2006Salamanca et al, 2016) as well as geochemical, ichnological and sedimentological data (Hovikoski et al, 2007;Jaramillo et al, 2017;Räsänen, Linna, Santos, & Negri, 1995;Vonhof et al, 2003). Amazonian lineages characteristic of marine environments include dolphins, manatees, sharks and stingrays (Bloom & Lovejoy, 2017;Jaramillo et al, 2017;Lovejoy, Albert, & Crampton, 2006). The existence of marine environments in Amazonia, and their influence on regional diversity, has been inferred from biogeographic analyses of amphibians (e.g.…”