In the belly of a plesiosaur were "stomach stones", which are called gastroliths. The marine iguana is … But to catch fish they could move their head and neck rapidly, like a snake striking. In the sea, ichthyosaurs, mosasaurs, ammmonites and many other organisms including the plesiosaurs became extinct. While not an ideal or recommended use, you could also use it for collecting crystal as well (Level up Weight, Damage and Health). On the land, only the birds survived from the dinosaur lineages. Get out of our tree house!). In the belly of a plesiosaur were "stomach stones", which are called gastroliths. Thus it most likely gave live birth to its young like sea snakes. Although plesiosaurs could reach 14 metres, much of their length was taken up by their necks. Another possible use for the neck is the reverse of the way a giraffe feeds by reaching up. Real sea monsters: The hunt for predator X. Scientists think it could live on both land and water like crocodiles. An exciting new paper published this week in the journal Science (Vol. However it happened, the consequences were massive and far-reaching. The real sea monsters When dinosaurs ruled on land, these reptiles prowled the seas Plesiosaurs inhabited the seas from around 200 million to 65 million years ago. The news is that Plesiosaur Peril is now out, so go buy ... that plesiosaurs could self-beach in … Secondly, there's no reason for it to go on land. a few mins now but did they stay entirely in water, i read that they have similarities to turtles, so i was curious if they could indeed go on land like them, or if not, i understand that their aquatic creatures, along a website apparently theyd struggle to maintain their head in the air as normal for some periods of time?? It’s an intriguing idea, but a couple of problems exist. Snowviraptor wrote: Plesiosaurus, and yes I am talking about plesiosaurus like we all were this whole time, did not go on land. 333, p.870-873) provides the first direct evidence for live birth in plesiosaurs, and may have implications for plesiosaur behaviour (O’Keefe & Chiappe, 2011). But plesiosaurs could not crack shells. Just How Good Is the Plesiosaur Fossil Record? "Plesiosaurs, mosasaurs and sea turtles are all non-dinosaurian reptiles that lived the sea in the Mesozoic and perhaps only came to land to lay eggs," Gillette said. But to catch fish they could move their head and neck rapidly, like a snake striking. Plesiosaurs have been found with fossils of belemnites (squid-like animals), and ammonites (giant nautilus-like molluscs) associated with their stomachs. Another possible use for the neck is the reverse of the way a giraffe feeds by reaching up. By now we might have see the plesiosaur wind down considerably, become a slower, more relaxed creature, something like a marine iguana almost. The fins of Elasmosaurus and other plesiosaurs are so stiff and specialized for swimming that they could not have come on land to lay eggs. So what's happened to the idea that plesiosaurs could venture onto land? The plesiosaur Polycotylus giving birth to … ... plesiosaur, but it would not be a plesiosaur). The plesiosaur would use its front flippers in the same motion someone would make to accelerate a rowboat. "Often, plesiosaurs are called sea monsters," said Chatterjee, a … Dinosaurs were, by definition, land animals. Unless it were to drag its head along the ground, then I don't think it could go on land. Plesiosaurs on the rocks: the terrestrial capabilities of four-flippered marine reptiles ... girls aren't allowed to be interested in prehistory. Plesiosaurs have been found with fossils of belemnites (squid-like animals), and ammonites (giant nautilus-like molluscs) associated with their stomachs.