A marine, carnivorous reptile belonging to the order Ichthyosaurus. A complete specimen from the Jurassic of Holzmaden, Germany, has revealed its body shape and skeleton. Its body shape is very similar to that of a modern-day dolphin. Its skull is also dolphin-like, with a long, protruding snout and many sharp teeth. It has large eye sockets and a scleral ring. It has an irregular caudal fin. It has no scales and is ovoviviparous. It is a representative example of the ichthyosaurs. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
魚竜群魚竜目に属する,海生,肉食の爬虫類。ドイツのホルツマーデンのジュラ系産の完全な標本から体形,骨格が明瞭になった。体形は今日のイルカによく似ている。頭骨もイルカ状で吻部は細長く突出し,多くの鋭利な歯をもっている。眼窩は大きく,鞏 (きょう) 膜骨輪がある。尾鰭は不等形。鱗はなく,卵胎生。魚竜類の代表例である。
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