Home https://server7.kproxy.com/servlet/redirect.srv/sruj/smyrwpoii/p2/ Science https://server7.kproxy.com/servlet/redirect.srv/sruj/smyrwpoii/p2/ Remains of a massive Jurassic "sea monster" found in a field in Poland

Remains of a massive Jurassic "sea monster" found in a field in Poland



Paleontologists in Poland have recently discovered the jaws and teeth of a monstrous plyosaurus, an ancient marine reptile with a bite more powerful than that of Tyrannosaurus rex .

Pliozauri, the largest of the Jurassic ocean predators, lived about 150 million years ago. Researchers have discovered the fossils of this huge carnivorous carrot in the Polish village of Krzyżanowice in the Holy Cross Mountain, along with several hundred bones of relatives of crocodiles, ancient turtles and long-haired plesiosaurs – cousins ​​to the Plio cousins.

Fossils from the Jurassic Pliozaurus have been discovered in only a few European countries and this is the first time that the bones of a massive marine predator have appeared in Poland, lead author of the study Daniel Tiborovski, paleontologist at the Museum of the Polish Academy of Sciences Earth in Warsaw , said in statement .

Related: Image Gallery: Ancient Sea Monsters

A limestone block found at a site in Poland has cone-shaped teeth and upper and lower jaw fragments that Scientists identify as belonging to the Pliozaurus, dating to 145 million and 163 million years ago. The largest tooth measures about 3 inches (68 millimeters) from crown to tip. Another large, isolated tooth – also believed to belong to a pliosaurus – measured about 2 inches (57 mm) long, according to the study.

Pliozaurus lived with dinosaurs (though not T rex which appeared about 70 million to 65 million years ago, during the Cretaceous period ]). "They are measured over 10 meters [32 feet] in length and can weigh up to several tens of tons," Tiborovsky said in a statement. "They had powerful, large skulls and massive jaws with large sharp teeth. Their limbs were in the form of fins." Unlike plesiosaurs – which had long, graceful necks and small heads – the pliosaurus had massive heads, supported by thick, powerful neck muscles that helped them break the bones of large prey.

One known species of pliosaurus, Pliosaurus funkei had a skull 7 feet long and a bite estimated at about four times more powerful than that of T. rex ]. These top predators would be at the top of the food chain in their marine ecosystems, feasting on crocodiles, plesiosaurs, turtles and fish, the study said. To date, six types of pliosaurus have been described. It is not yet known to what species the new fossils belong.

"We hope that the coming months and years will bring even richer material in the form of bones of large reptiles," Tiborovsky said in a statement. [19659015] Plyosaurian jaws and teeth from the site of Krzyżanowice, in the Holy Cross Mountains in Poland. "class =" lazy-image lazy-image-loading lazyload optional-image "onerror =" if (this.src && this.src.indexOf ('missing-image.svg')! == -1) {return true; }; this.parentNode.replaceChild (window.missingImage (), this) "sizes =" auto "data-normal =" https://vanilla.futurecdn.net/livescience/media/img/missing-image.svg " -src = "https://cdn.mos.cms.futurecdn.net/J9GQekE3WrAgB9qRYDAyzn-320-80.jpg" data-srcset = "https://cdn.mos.cms.futurecdn.net/J9GQekE3WrAgB9qRYDAyzn-320-80.jpg" .jpg 320w, https://cdn.mos.cms.futurecdn.net/J9GQekE3WrAgB9qRYDAyzn-650-80.jpg 650w "data-sizes =" auto "data-original-mos =" https: //cdn.mos.cms .futurecdn.net / J9GQekE3WrAgB9qRYDAyzn.jpg "data-pin-media =" https://cdn.mos.cms.futurecdn.net/J9GQekE3WrAgB9qRYDAyzn.jpg "/>

Pliozavid jaws and teeth, Kribow jaws and teeth Holy Cross in Poland.

(Credit: D. Tyborowskia and B. Błazejowskib, Proc. Geol. Assoc. (2019), doi.org/10 .1016 / j.pgeola.2019.09.004)

More than 100 million years ago, this mountain region was an archipelago of islands surrounded by warm lagoons, but the diversity of Jurassic marine species in the mountain site also suggests that the area is a "hub" where the habitats of different groups of marine reptiles overlap, scientists say.

Ancient turtles and crocodile relatives are known from Mediterranean sites; they inhabited the warm waters of the Tethys Ocean, a vast sea that lay between two ancient supercontinents – Gondavna to the south and Laurasia to the north – during the Mesozoic period, 251 million to 65.5 million years ago. But pliosauri, plesiosaurs and ichthyosaurs (another species of marine reptiles with long slender jaws) are more commonly found in cooler waters farther north. Because the site in Krzyzanovice contains fossils from both warmer and cooler environments, researchers suggest that it is a transition zone that was once a unique ocean ecosystem, according to the study.

The findings were published online October 6 in the journal Proceedings of the Geologists Association .

Originally published on Live Science .


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