Resumen: The Natural Science Museum of the University of Zaragoza houses one of the most important collections in Spain of fossils published in scientific journals. It is a new museum, which has brought together the fossil collections of the Palaeontological Museum of the University of Zaragoza with the university’s historical collections. It harbours 33, 561 fossils, which have been studied in 524 scientific publications (dissertations, books and journals), and of which 243 are holotypes. All the material is inventoried in a FileMaker database and is available for consultation by any researcher who applies to do so. The type fossil collection is mainly from the Autonomous Region of Aragón in Spain (comprising the provinces of Zaragoza, Huesca and Teruel), with a small proportion from other Spanish regions (less than 10%) and from other countries (less than 1%). The collection is diverse on what concerns taxonomic groups, with arthropods, brachiopods, echinoderms and vertebrates standing out in terms of the number of specimens and of holotypes. The fossils date from the Upper Proterozoic to the Pleistocene, the Carboniferous-Triassic being the least-represented period. Particularly noteworthy are the collections of invertebrates from the Cambrian and of mammals from the Aragonian (Tertiary). Idioma: Inglés DOI: 10.1007/s12371-017-0228-1 Año: 2017 Publicado en: Geoheritage (Berlin) 10, 3 (2017), 385–392 ISSN: 1867-2477 Factor impacto JCR: 2.333 (2017) Categ. JCR: GEOSCIENCES, MULTIDISCIPLINARY rank: 75 / 189 = 0.397 (2017) - Q2 - T2 Factor impacto SCIMAGO: 0.554 - Earth and Planetary Sciences (miscellaneous) (Q2) - Nature and Landscape Conservation (Q2) - Geography, Planning and Development (Q2)