Ameghiniana is a bimonthly journal that publishes original contributions on all aspects of the paleontology. Having been published 50 volumes, it has undoubtedly become the main palaeontological publication in Latin America, based on the originality of its contents, the high quality of its illustrations and the rigorous review process of its articles. Usually the papers are published in Spanish and English. Its contents are regularly cited in prestigious indices, as Bibliography and Index of Geology, Biological Abstracts, Zoological Record, Current Contents (Physical, Chemical & Earth Sciences), Geological Abstracts, Latindex, Gushengwuxue Wenzhai, Pascal, Referativnyi Zhurnal, Research Alert y Science Citation Index. From volume 50 Ameghiniana will have a bimonthly frequency, in this way we aim to achieve a reduction in the turn around time due to the increasing number of submissions received.