Link to bioRxiv paper: http://biorxiv.org/cgi/content/short/2020.02.03.932756v1?rss=1 Authors: Orihuela, J., Ceballos Izquierdo, Y., Portell, R. W. Abstract: Herein we provide the first report of the rare cardiid bivalve Schedocardia from Cuba. The single, partial, valve external mold was derived from the Madruga Formation which is characterized by a richly diverse marine fauna including echinoderms, brachiopods, benthic and planktonic foraminiferans, but from which bivalves were not previously reported. The unit is considered late Paleocene in age (Thanetian), but the presence of Schedocardia supports a possible age extension of the formation into the early Eocene (Ypresian). Moreover, we provide a reconsideration of the historical factors that affected the accepted type locality of the outcrop, which allows for an alternative interpretation of the shallow water fauna found therein. Copy rights belong to original authors. Visit the link for more info