Jorge Pinto, Andre FilipeÁlvarez Lloret, PedroCallegari, IvanScharf, Andreas2025-06-242025-06-242025-06-23Pinto, A. J., Álvarez-Lloret, P., Callegari, I., & Scharf, A. (2025). An Ediacaran trace-like body fossil of a Palaeopascichnus specimen from Oman under 3D micro-tomography. Facies, 71(3), 13. https://doi.org/10.1007/s10347-025-00705-510.1007/s10347-025-00705-5https://hdl.handle.net/20.500.14352/121786Palaeopascichnus is an Ediacaran organism, whose phylogenetic affiliation and functional anatomy are both shrouded in mystery. Different studies and assessments have interpreted this fossil as macrophytes or foraminifera-like protists. Currently ongoing discussions concerns the possible phylogenetic relation between Palaeopascichnus and modern xenophyophores; benthic organisms that built agglutinated tests. We present micro-XRD, SEM-EDS and three-dimensional microtomographic data on a possible Palaeopascichnus specimen from the Ediacaran Fara Formation, in Wadi Bani Awf, Jabal Akhdar, Oman. The unique preservation of this specimen as a full positive epirelief of drusy calcite growths represents a new taphotype for this organism, enabling a more accurate observation of chamber structure and better morphological characterization. The data gathered concerning both chamber´s dimensions and morphology does not point towards an affiliation with any known Paleopascichnus species, except for much smaller P. jiumenensis. Therefore, it is possible that this specimen represents a new, previously unknown species.engAttribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/journal article2075-163Xhttps://doi.org/10.1007/s10347-025-00705-5https://link.springer.com/article/10.1007/s10347-025-00705-5open access56:616-073.7PalaeopascichnidsX-ray micro-tomographyFara formationWadi bani awfMineralogía (Geología)2506 Geología