Number 15: Meganeura, largest flying insect of all time. It had a wingspan of 2.3 feet and it weighed 0.3 pounds. It lived 300 million years ago in the Carboniferous period.
Number 14: Arthropleura, largest arthropod of all time. It was 8.5 feet long and weighed 1100 pounds. It lived 340 to 280 million years ago in the Carboniferous period.
Also worthy of mentioning...
Jaekelopterous, largest sea arthropod of all time. It was 8.2 feet long and weighed 66 pounds. It lived 390 million years ago in the Devonian period.
Number 13: Titanoboa, largest snake of all time. It was 50 feet long and was 3 feet in diameter. It lived 60 million years ago in the Eocene period.
Number 12: Megalania, largest lizard of all time. It was 26 feet long and weighed 4,280 pounds. It lived about 1 million years ago in the Neogene period.
Number 11: Sarchosuchus, largest crocodile of all time. It was 38.2 feet long and weighed 8.8 tons. It lived 112 million years ago in the Cretaceous period.
Number 10: Koolasuchus, largest amphibian of all time. It was 16 feet long and weighed 1,100 pounds. It lived 120 million years ago Cretaceous period.
Number 9: Shastasaurus, largest Icthyosaur of all time. It was 69 feet long. It lived 210 million years ago in the Triassic period.
Number 8: Pliosaurus Funkei, largest short necked plesiosaur of all time. It was 55 feet long and weighed 45 tons. It lived in the Jurassic period.
Number 7: Spinosaurus Aegyptiacus, largest land carnivore ever. It was 51 feet long and weighed 9 tons. It lived 112 to 70 million years ago in the Cretaceous period.
Number 6: Indricotherium, largest land mammal ever. It was 26 feet tall and weighed 30 tons. It lived 37 to 23 million years ago in the Eocene to Miocene period.
Number 5: Megalodon, largest cartilaginous us fish ever. It was 66 feet long and weighed 103 tons. It lived 28 to 1.5 million years ago in the Oligocene to early Pleistocene period.
Number 4: Leedsichthys, largest bony fish of all time. It was 70 feet long and weighed 50 tons. It lived 120 million years ago in the Jurassic period.
Number 3: Quetzalcoatlus, largest flying organism of all time. It had a wingspan of 52.2 feet, weighed 550 pounds, and was 20 feet tall. It lived 65 million years ago in the Cretaceous period.
Number 2: Blue Whale, largest mammal (heaviest animal). It is 98 feet long and weighs 180 tons. It lives 50 million years ago till today.
Number 1: Amphicoelias Fragillimus, largest land animal ever. It was 190.3 feet long and weighed 122 tons. It lived 150 million years ago in the Jurassic period.
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