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A new paper is available online if you're interested: Claudia Inés Serrano-Brañas; Belinda Espinosa-Chávez; S. Augusta Maccracken; Cirene Gutiérrez-Blando; Claudio de León-Dávila; José Flores Ventura (2020). Paraxenisaurus normalensis, a large deinocheirid ornithomimosaur from the Cerro del Pueblo Formation (Upper Cretaceous), Coahuila, Mexico. Journal of South American Earth Sciences. in press: Article 102610. doi:10.1016/j.jsames.2020.102610. Paraxenisaurus constitutes the first record of Deinocheiridae in North America, and it also represents the second ornithomimosaur to be described from Mexico ("Saltillomimus" is waiting to be published). The question now is whether a number of specimens found in the late Campanian-Maastrichtian of New Mexico assigned to Ornithomimidae could be similar to Deinocheirus and Paraxenisaurus.
Ramon posted a topic in Fossil IDHello, I found this fossil last spring break, in Coahuila, Mexico. It comes from the late Campanian (73-71 Myrs) Cerro del Pueblo formation. I found several fossils at the same location where I found this fossil. Some of the fossils I found include Cerithium snails, several species of Physidae freshwater snails, Inoceramus sp., petrified wood with teredolites, ammonite fragments, a caudal vertebra from a Hadrosaurid, and plenty of dinosaur bone fragments. The formation is a mess, it’s composed of layers that were deposited in marine, and terrestrial environments, as well as rivers and possibly swamps. Even though I’m very knowledgeable of the formation, and the fossils that have been found there I still have no idea as to what this specimen is. My best guess at the moment is that it’s some type of plant material maybe a fruit or a seed. There have been numerous plant fossils found at the formation, including fruits. I also think this could be embedded in a coprolite, with the rounded object being embedded in it. Let me know what you guys think about it.