Álvarez Parra, SergioPérez de la Fuente, RicardoPeñalver, EnriqueBarrón López, EduardoAlcalá, LuisPérez Cano, JordiMartín Closas, C.Trabelsi, KhaledMeléndez Hevia, María NievesLópez del Valle, RafaelLozano, Rafael P.Peris, DavidRodrigo, AnaSarto i Monteys, VíctorBueno Cebollada, Carlos A.Menor Salvan, C.Philippe, MarcSánchez García, AlbaPeña-Kairath, ConstanzaArillo, AntonioEspílez, EduardoMampel, LuisDelclòs, Xavier2023-06-172023-06-1720212050084X10.7554/eLife.72477https://hdl.handle.net/20.500.14352/8626Dinosaur bonebeds with amber content, yet scarce, offer a superior wealth and quality of data on ancient terrestrial ecosystems. However, the preserved palaeodiversity and/or taphonomic characteristics of these exceptional localities had hitherto limited their palaeobiological potential. Here, we describe the amber from the Lower Cretaceous dinosaur bonebed of Ariño (Teruel, Spain) using a multidisciplinary approach. Amber is found in both a root layer with amber strictly in situ and a litter layer mainly composed of aerial pieces unusually rich in bioinclusions, encompassing 11 insect orders, arachnids, and a few plant and vertebrate remains, including a feather. Additional palaeontological data—charophytes, palynomorphs, ostracods— are provided. Ariño arguably represents the most prolific and palaeobiologically diverse locality in which fossiliferous amber and a dinosaur bonebed have been found in association, and the only one known where the vast majority of the palaeontological assemblage suffered no or low-grade pre-burial transport. This has unlocked unprecedentedly complete and reliable palaeoecological data out of two complementary windows of preservation—the bonebed and the amber—from the same site.engAtribución 3.0 Españahttps://creativecommons.org/licenses/by/3.0/es/Dinosaur bonebed amber from an original swamp forest soiljournal articlehttps://doi.org/10.7554/eLife.72477https://elifesciences.org/articles/72477open access56(460.226)Paleontología2416 Paleontología