RT Journal Article SR Electronic T1 First report of the Eocene bivalve Schedocardia (Mollusca, Cardiidae) from Cuba JF bioRxiv FD Cold Spring Harbor Laboratory SP 2020.02.03.932756 DO 10.1101/2020.02.03.932756 A1 Johanset Orihuela A1 Yasmani Ceballos Izquierdo A1 Roger W. Portell YR 2020 UL http://biorxiv.org/content/early/2020/06/14/2020.02.03.932756.abstract AB Herein we provide the first report of the 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 fauna found therein.RESUMEN Se reporta por primera vez el género bivalvo Schedocardia de la Formación Madruga, para el registro fósil de Cuba. De esta formación se ha reportado una rica fauna de invertebrados incluyendo equinodermos, braquiópodos y, especialmente de foraminíferos, pero no moluscos bivalvos. Se ha considerado que la Formación Madruga se depositó durante el Paleoceno tardío (Thanetiano), no obstante, la presencia de Schedocardia apoya la extensión de edad de la formación hasta el Eoceno temprano (Ypresiano). Además, se consideran factores antropogénicos que han afectado la localidad tipo de la formación.Competing Interest StatementThe authors have declared no competing interest.