Legend: Papers published in the journal Nature
Just a few days ago, paleontologists published a paper entitled "Underwater foraging in carnivorous dinosaurs" in Nature, which provided new fossil evidence for the view that Spinosaurus stayed in water for a long time (hydrophilic). The first author is Matteo Fabbri, a paleontologist at the Field Museum of Natural History.
Legend: matteo Fabry (first from right) is with other paleontologists, among whom Ibrahim (second from left) and Paul Salino (middle) have made important contributions to the discovery and research of Spinosaurus.
In fact, the idea of Spinosaurus fishing in the water all day is not new. When its tail was discovered and announced in early 2020, its habit of going into the water and staying in the water for a long time was the real hammer, so this research is icing on the cake, not subverting cognition.
Legend: Fossil coccygeal vertebrae of Spinosaurus
Legend: Reconstruct the tail shape of Spinosaurus according to the discovered fossils.
Legend: 2020 version of Spinosaurus Restoration
This time, paleontologists chose to observe the bone density of dinosaurs, because in animals, the higher the bone density, the more accustomed they are to living in water. A similar situation also occurs in birds' penguins and mammals' hippos.
Legend: Swimming Penguin
Since you want to get the material about dinosaur bone density, you have to cut the fossil to see the section, so the carnival of bone-cutting enthusiasts began. Paleontologists * * * have discovered the fossils and bones of 380 kinds of animals, which come from 29/kloc-0 kinds of animals, including mammals, birds and reptiles. These animals include Spinosaurus, in addition to its two close relatives, one is like E Long, and the other is barite.
Legend: The animal bones and fossil slices designed in the study are really a huge project.
After bone cutting, scanning and analysis, paleontologists have obtained a lot of data. Sure enough, the bone density of Spinosaurus was as high as 0.968. This is very similar to the situation of penguins. There is no doubt that it is the dinosaur who likes to stay in the water best. Like E Long, the bone density is 0.68. It seems that he doesn't like playing with water. He usually stands in diving and fishes like a heron with his feet.
Deinonychus is similar to E Long in appearance and should have similar habits. The data of bone mineral density can be estimated to be shocking. Its bone density even reached above 0.9. Obviously, it is a new member of the Cretaceous diving club and will stay in the water most of the time. It is with the support of this data that the silhouette at the end of the Diptera skeleton map in this paper becomes so wide, which is the "paddle" of underwater propulsion.
Legend: Spinosauridae skeleton and outline in the paper.
Legend: Diptera swims and fishes in the water
Legend: Welcome Diptera to join Cretaceous diving club.
Surprisingly, not only deinonychus, but also the bone mineral density of many dinosaurs, such as Halszkaraptor. The study found that Hazecaraptor's bone density was only 0.493, which was the same as other terrestrial dinosaurs, and it was nicknamed "Cretaceous Little Yellow Duck", so at least it could not support her in bone density. It is a dinosaur that stays in the water for a long time and is good at diving.
Legend: Can you find the bone density of some species?
Legend: the revival of Hazka pirates
Legend: The recovery of pirate swimming in Hazka.
Far from the point, get to the point! Since the discovery of Spinosaurus, there has been fossil evidence and research that they are an alternative in the dinosaur family and were super fishermen in Cretaceous. Based on paddle tail, webbed hind legs, oxygen isotope level and this study on bone mineral density, it is basically confirmed that Spinosaurus is a giant carnivorous dinosaur that is good at underwater interaction and feeds on fish.
Legend: Spinosaurus was really a great fisherman in Cretaceous.
Typesetting: Jiang's Microraptor
Pictures and related materials come from the Internet.