![formation complete adobe illustrator cs5 formation complete adobe illustrator cs5](https://img.yumpu.com/4574213/1/500x640/la-formation-complate-sur-adobe-illustrator-cs5-video2brain.jpg)
![formation complete adobe illustrator cs5 formation complete adobe illustrator cs5](https://www.yema.cm/705-medium_default/illustrator-.jpg)
However, here we report the unexpected occurrence of a new turiasaur from North America, dating to the late Berriasian-early Aptian (c.142-124 Ma) a time interval in which sauropod remains are rare globally 5, 12. The non-neosauropod eusauropod lineage Turiasauria, previously only known from the Late Jurassic of Europe 1, 9, 10 and possibly the Middle Jurassic of Africa 11, was therefore a potential victim of an extinction at the Jurassic-Cretaceous boundary 4, 5, 7. However, recent work has suggested that lower diversity at this time was not the result of a true mass extinction occurring at the Jurassic-Cretaceous boundary itself rather, it represents a sequence of turnover events that lasted well into the Early Cretaceous 6, 7. This apparently resulted in the extinction of most of the non-neosauropod eusauropods that had dominated Jurassic faunas, and their replacement by neosauropods in the Cretaceous 3, 4, 7. In particular, they suffered a 60-80% extinction at the end of the Jurassic 3, 4, 5, 6, 7, which was part of a much wider extinction event affecting many marine and terrestrial groups 7, 8. Although they had achieved a global distribution by the Middle Jurassic and maintained their dominance until the end of the Cretaceous 3, 4, their evolutionary history was not without its crises. Sauropod dinosaurs were the largest vertebrates ever to walk the Earth 1, 2 and were a diverse and successful group 3. Mierasaurus and Moabosaurus are the only non-neosauropod eusauropods known from North America, despite being younger than the classic neosauropods of the Morrison Formation ( c.150 Ma). The revised spatiotemporal distribution of turiasaurs is consistent with the presence of a land connection between North America and Europe sometime during the late Tithonian to Valanginian ( c.147-133 Ma). These recent discoveries in Utah suggest that turiasaurs as a lineage survived the Jurassic-Cretaceous extinction boundary and expanded their known range, at least, into western North America. This group of non-neosauropod eusauropods, which now includes five genera ( Losillasaurus, Turiasaurus, Mierasaurus, Moabosaurus and Zby), was previously known only from the Jurassic of Europe. Moreover, according to our phylogenetic results, Moabosaurus utahensis from the lower Yellow Cat Member of Utah (USA) is also a member of this clade. from the lower Yellow Cat Member (Early Cretaceous) of Utah (USA), is the first recognized member of Turiasauria from North America. A new, largely complete eusauropod dinosaur with cranial and postcranial elements from two skeletons, Mierasaurus bobyoungi gen.