Post by dinosauria101 on May 1, 2019 9:22:39 GMT 5
Liopleurodon ferox
Liopleurodon (meaning 'smooth-sided teeth') is a genus of large, carnivorous marine reptile belonging to the Pliosauroidea, a clade of short-necked plesiosaurs. The two species of Liopleurodon lived during the Callovian stage of the Middle Jurassic Period (c. 160 to 155 mya). It was the apex predator of the Middle to Late Jurassic seas that covered Europe. The largest species, L. ferox, is estimated to have grown up to 6.4 metres (21 ft) in length. Four strong paddle-like limbs suggest that Liopleurodon was a powerful swimmer. Its four-flipper mode of propulsion is characteristic of all plesiosaurs. A study involving a swimming robot has demonstrated that although this form of propulsion is not especially efficient, it provides very good acceleration - a desirable trait in an ambush predator. Studies of the skull have shown that it could probably scan the water with its nostrils to ascertain the source of certain smells. The body mass has been estimated at 1 and 1.7 t (2,200 and 3,700 lb) for the lengths 4.8 and 7 m (16 and 23 ft) respectively.
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Ginsu Shark - Cretoxyrhina mantelli
Cretoxyrhina mantelli, the "Jaws of the Cretaceous", was a shark that lived in the Cretaceous period in the in the Western Interior Sea, about 100 million years ago. C. mantelli grew up to 24 feet (7 meters) long, and is known from several nearly complete skeletal fossils. Its name means "Mantell's chalk-sharp-nose".According to Shimada, associated fossil remains with evidence of digestive damage suggest that probable fish prey of C. mantelli included the massively jawed, 14-foot (4.25-metre) long Xiphactinus, which resembled a dagger-toothed tarpon and was a powerful predator in its own right. Based on a few tooth-scarred, associated mosasaur vertebrae, Shimada suggests that C. mantelli also tackled these 10- to 40-foot (3- to 12- metre) long marine reptiles of the late Cretaceous. While it is tempting to imagine titanic undersea battles between a giant shark and a sea dragon, it seems far more likely that Cretoxyrhina more commonly fed on large pelagic bony fishes, taking juvenile mosasaurs when the opportunity arose, and perhaps even dining on the occasional long-necked plesiosaur. Shimada concluded that Cretoxyrhina mantelli occupied a top predatory niche comparable to that of the modern White Shark (Carcharodon carcharias). Despite its fearsome size and armament, C. mantelli did not long survive, becoming extinct by about 90 million years ago. Known specimens of the Ginsu Shark are about the same size as the largest recorded Great Whites Sharks.
Credit to Wikipedia
Liopleurodon (meaning 'smooth-sided teeth') is a genus of large, carnivorous marine reptile belonging to the Pliosauroidea, a clade of short-necked plesiosaurs. The two species of Liopleurodon lived during the Callovian stage of the Middle Jurassic Period (c. 160 to 155 mya). It was the apex predator of the Middle to Late Jurassic seas that covered Europe. The largest species, L. ferox, is estimated to have grown up to 6.4 metres (21 ft) in length. Four strong paddle-like limbs suggest that Liopleurodon was a powerful swimmer. Its four-flipper mode of propulsion is characteristic of all plesiosaurs. A study involving a swimming robot has demonstrated that although this form of propulsion is not especially efficient, it provides very good acceleration - a desirable trait in an ambush predator. Studies of the skull have shown that it could probably scan the water with its nostrils to ascertain the source of certain smells. The body mass has been estimated at 1 and 1.7 t (2,200 and 3,700 lb) for the lengths 4.8 and 7 m (16 and 23 ft) respectively.
Ginsu Shark - Cretoxyrhina mantelli
Cretoxyrhina mantelli, the "Jaws of the Cretaceous", was a shark that lived in the Cretaceous period in the in the Western Interior Sea, about 100 million years ago. C. mantelli grew up to 24 feet (7 meters) long, and is known from several nearly complete skeletal fossils. Its name means "Mantell's chalk-sharp-nose".According to Shimada, associated fossil remains with evidence of digestive damage suggest that probable fish prey of C. mantelli included the massively jawed, 14-foot (4.25-metre) long Xiphactinus, which resembled a dagger-toothed tarpon and was a powerful predator in its own right. Based on a few tooth-scarred, associated mosasaur vertebrae, Shimada suggests that C. mantelli also tackled these 10- to 40-foot (3- to 12- metre) long marine reptiles of the late Cretaceous. While it is tempting to imagine titanic undersea battles between a giant shark and a sea dragon, it seems far more likely that Cretoxyrhina more commonly fed on large pelagic bony fishes, taking juvenile mosasaurs when the opportunity arose, and perhaps even dining on the occasional long-necked plesiosaur. Shimada concluded that Cretoxyrhina mantelli occupied a top predatory niche comparable to that of the modern White Shark (Carcharodon carcharias). Despite its fearsome size and armament, C. mantelli did not long survive, becoming extinct by about 90 million years ago. Known specimens of the Ginsu Shark are about the same size as the largest recorded Great Whites Sharks.
Credit to Wikipedia