RT Journal Article T1 Middle Triassic (Muschelkalk) transgression in the West Tethys: biostratigraphic evidence from Sardinia (Italy) A1 Stori, Lorenzo A1 Ronchi, Ausonio A1 López Gómez, José A1 Márquez Aliaga, Ana A1 Ros Franch, Sonia A1 Goy Goy, Antonio A1 Márquez Sanz, Leopoldo A1 Gandin, A. A1 Martín Chivelet, Javier AB Stratigraphic and palaeontological analyses of the Middle Triassic (latest Anisian–Ladinian) in Muschelkalk facies are performed here to further unravel the palaeogeographic evolution of Sardinia in this time-frame. These shallow marine successions reveal a significant palaeontological record comprising facies and marker fossils (ammonoids, bivalves, conodonts, foraminifera etc.) reflecting a regional transgressive episode recorded throughout the West Mediterranean, after the Permian–Triassic biotic crisis. Particularly rich in the Nurra and Sarcidano-Gerrei areas, the facies/fossil record indicates the progressive westward settling of carbonate platforms, and consequently the development of new migration and irradiation routes for Sephardic faunas from the southeast (Palaeotethys) and Alpine faunas (Neotethys) from the northeast. Based on new findings and the revision of palaeontological associations previously reported, comparisons were made with associations of adjacent domains (Balearic Islands, Levantine area), thus refining their palaeoecological distribution and better framing Sardinia as a key area in the palaeogeographic evolution of the West Tethys during the Ladinian. PB Elsevier SN 1871-174X YR 2024 FD 2024-08 LK https://hdl.handle.net/20.500.14352/106752 UL https://hdl.handle.net/20.500.14352/106752 LA eng NO Stori, Lorenzo, et al. «Middle Triassic (Muschelkalk) Transgression in the West Tethys: Biostratigraphic Evidence from Sardinia (Italy)». Palaeoworld, vol. 33, n.o 4, agosto de 2024, pp. 997-1024, https://doi.org/10.1016/j.palwor.2023.08.001. NO University of Pavia NO Ministerio de Ciencia, Innovación y Universidades DS Docta Complutense RD 6 abr 2025