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Previtera, E., 2019. Taphonomic analysis of saurischian dinosaurs from the Plottier Formation (Upper Cretaceous), Mendoza, Argentina. Andean geology: Formerly Revista geológica de Chile, 46(2), pp.345-367. DOI: http://dx.doi.org/10.5027/andgeoV46n2-3161 http://www.andeangeology.cl/index.php/revista1/article/view/V46n2-3161 http://www.andeangeology.cl/index.php/revista1/article/view/V46n2-3161/pdf Yours, Paul H.

How are fossils Given ID names? All dinosaurs have a group, be it Ornithoscelida or Saurischia, Genus/Species names, and Common names. They all have Their own Collectors and field notes, too. But the most perplexing part is how they have individual ID's. How did FMNH PR 2081 get it's name? or MOR 555? i know the first initials, FMNH and MOR stand for the museum they are held in, but what about the numbers 2081 and 555? what about the PR in FMNH PR 2081? I am asking so when i research dinosaurs, say U. Ostrommaysorum, I can find the actual fossils instead of museum casts, full (yet fake) skeletons, and Find important field notes. if you know any other ways, please share. I am asking a wide audience, but I would prefer to direct it towards Paleontologists in The collection areas of museums, where the real fossils are stored. Thank you, and PLEASE HELP ME!!!!!!!

The family tree was announced back in February but the paper was just published. https://www.theguardian.com/science/2017/apr/19/how-we-revealed-a-new-family-tree-for-dinosaurs?CMP=share_btn_tw Abstract: For 130 years, dinosaurs have been divided into two distinct clades—Ornithischia and Saurischia. Here we present a hypothesis for the phylogenetic relationships of the major dinosaurian groups that challenges the current consensus concerning early dinosaur evolution and highlights problematic aspects of current cladistic definitions. Our study has found a sister-group relationship between Ornithischia and Theropoda (united in the new clade Ornithoscelida), with Sauropodomorpha and Herrerasauridae (as the redefined Saurischia) forming its monophyletic outgroup. This new tree topology requires redefinition and rediagnosis of Dinosauria and the subsidiary dinosaurian clades. In addition, it forces re-evaluations of early dinosaur cladogenesis and character evolution, suggests that hypercarnivory was acquired independently in herrerasaurids and theropods, and offers an explanation for many of the anatomical features previously regarded as notable convergences between theropods and early ornithischians Paper it's paywalls publication http://www.nature.com/nature/journal/v543/n7646/abs/nature21700.html