Biodiversity of ecosystems in an arid setting: The late Albian plant communities and associated biota from eastern Iberia

palaeobotanical studies [29, 30]. Amber fragments are abundant [40, 44] and recorded in a mudstone bed of the upper part of the succession, which is sharply overlain by the marine car- bonates of the Mosqueruela Formation [47]. Fig 4. Amber from the late Albian San Just outcrop (Utrillas, Teruel) and its bioinclusions. (A) Big kidney-shaped amber mass of 640 g. (B) Unearthed amber pieces. (C) Undetermined Lagonomegopidae? spider (SJNB2012-12-07). (D) Holotype of Actenobius magneoculus (Coleoptera, Ptinidae) (MAP-7727). (E) Holotype of Cretevania alcalai (Hymenoptera, Evaniidae) (CPT-960). (F) Avian dinosaur feather barb close to an undetermined Platygastroidea wasp (CPT-4078 and CPT-4079, respectively). Scale bars C–F, 0.5 mm. Images A and B are provided by Enrique Peñalver. Acronyms SJNB, CPT and MAP correspond to amber pieces housed at the Museo Aragone´s de Paleontologı´a (Fundacio´n Conjunto Paleontolo´gico de Teruel-Dino´polis) in Teruel, Spain. https://doi.org/10.1371/journal.pone.0282178.g004 PLOS ONE Late Albian desert biota from Iberia PLOS ONE | https://doi.org/10.1371/journal.pone.0282178 March 2, 2023 7 / 51