A late Jurassic dinosaur related to brachiosaurus, known from only a few bones but probably the tallest ever animal, and possibly the heaviest at up to 130 tons.
- Genus Ultrasaurus, infraorder Sauropoda, order Saurischia.
- Many of the sauropods are closely related and perhaps you are correct in thinking ultrasaurus is just a massive brachiosuar but this is doubtful.
- But scientists have taken a second look and surmise that ultrasaurus could be the remains of a huge brachiosaur and supersaurus mixed together.
- When I was about 5 I had a dinosaur book and there was a page with a silhouette drawing of a man standing beside an ultrasaurus leg.
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