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The scientific community in Philadelphia and concerned neighbors are calling on Drexel University to keep the Academy of Natural Sciences of Philadelphia’s public-facing museum open beyond their impos...

Lambeosaurines are abundant in the Dinosaur Park Formation of Alberta, but are poorly known from the underlying Oldman Formation (Upper Cretaceous: Campanian). A new partial skull roof and braincase f...

from Hutchinson, J.R., Faughey, E., Humpage, M., Dupuis, T., Demuth, O.E., Pintore, R., Clarac, F. 2026. Functional morphology and biomechanics of the locomotor apparatus in the large Late Triassic carnivore Postosuchus kirkpatricki (Archosauria: Rauisuchidae). Journal of Anatomy, published online. https://doi.org/10.1111/joa.70189OpenSim 4.1 musculoskeletal (biomechanics) files for digitigrade and plantigrade models. Open Source: https://simtk.org/frs/?group_id=91Autodesk Maya 2026 .mb file from volumetric muscle modelling. Educational/academic licenses: https://www.autodesk.com/uk/education/home

A three-dimensional model is used to analyze the locomotor biomechanics of the large Late Triassic archosaurian reptile Postosuchus kirkpatricki. The study finds that it is more uncertain than previo...

Germany and Brazil reach agreement over controversial spinosaurid fossil, heralding new collaboration between the two nations

Oviparity was likely the plesiomorphic reproductive condition for non-mammalian Synapsida, the stem-mammal group. Yet, despite nearly two centuries of research, no definitive fossil eggs of late Palaeozoic or early Mesozoic synapsids have been discovered. Here, three perinate specimens of the dicynodont genus Lystrosaurus from the Early Triassic of the South African Karoo Basin are examined using high-resolution CT and synchrotron scanning. One specimen, NMQR 3636, displays a tightly curled posture suggestive of an in ovo position and completely lacks tusks. Crucially, the lower jaw symphysis remains unfused—a developmental trait found only in pre-hatching embryos of modern birds and turtles. No calcified eggshell is preserved, so the egg might have been soft and leathery. The large size of the reconstructed egg suggests a precocial, non-milk-feeding developmental strategy. As a non-cynodont synapsid, Lystrosaurus offers a rare and valuable glimpse into reproductive biology far removed from the mammalian crown group. Unlike the more derived, mammal-like cynodont Kayentatherium, whose egg size aligns with lactation, Lystrosaurus anchors the plesiomorphic condition deep within Synapsida. Its reproductive strategy may have played a crucial role in its resilience and ecological dominance following the end-Permian mass extinction.