Post by dinosauria101 on Feb 20, 2019 0:15:06 GMT 5
Pontolis magnus
Pontolis was a large species of pinniped closely related to a modern-day walrus. It contained only the single species Pontolis magnus. An amphibious carnivore, it was found in formerly marine or coastal areas in what is now California and Oregon, dating between 11.608 and 5.332 million years ago, during the Miocene and Pliocene. Estimated Weight - 1,000 to 3,000 kg?
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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Credit to Wikipedia
Pontolis was a large species of pinniped closely related to a modern-day walrus. It contained only the single species Pontolis magnus. An amphibious carnivore, it was found in formerly marine or coastal areas in what is now California and Oregon, dating between 11.608 and 5.332 million years ago, during the Miocene and Pliocene. Estimated Weight - 1,000 to 3,000 kg?
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.
Credit to Wikipedia
