NEW DINOSAUR: An oviraptorosaur named Yuanyanglong from the Early Cretaceous of China. Features of its bones are similar to those of wading birds and it may have lived like such. Gastroliths preserved in the fossil as well.
https://www.sciencedirect.com/science/article/abs/pii/S0195667124001964
Restoration by Ddinodan.
Devonian reefs were very productive ecosystems. Corals at the time had symbiotic relationships with things like dinoflagellates.
https://www.nature.com/articles/s41586-024-08101-9
A new metatherian from the Late Cretaceous of Colorado, named Heleocola. It was relatively large and may have been an omnivore.
https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0310948