クロノサウルス Kronosaurus オーストラリア恐竜大陸
世界共通発音: クロノソーラス crone-oh-saw-rus
命名意味: Krono's Lizard
Euryapsida / Sauropterygia / Pliosauria
/ Family: Dolichorhynchopidae
/ First Discovered: 1901 / Found: Australasia：Australia / Length: 12m / Weight: 50t / Food: Meat
/ Young: Live young
/ Lived Early Cretaceous 112 million years ago
The pliosaurs and plesiosaurs formed the second group of reptiles that flourished in the oceans during the Mesozoic era. Of the two, the pliosaurs had massive heads and short necks, whereas the plesiosaurs had very small heads and long, flexible necks.
Kronosaurus was a typical pliosaur and has been described as one of the most fearsome animals to have lived on Earth. Its enormous head was over 3 m long, with massive jaws and peg-like front teeth of up to 25 cm in length. At the back of the jaw the teeth were rounded and it is likely that they were used for crushing shells or bones.
Kronosaurus had four large paddle-like limbs that enabled it to propel itself through water at great speed. In contrast to the long-necked plesiosaurs, the four paddles were roughly the same size, each measuring close to 1 m in length. It fed on anything, with large fish, reptiles and giant invertebrates (animals without backbones) high on its list of prey.