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1) Jaekelopterus Rhenaniae :[br][br]Jaekelopterus is a genus of predatory eurypterid , a group of extinct aquatic arthropods. Fossils of Jaekelopterus have been discovered in deposits of Early Devonian age from the Pragian and Emsian stages. There are two known species: the type species J. Rhenaniae from brackish to fresh water strata in the Rhineland and J. howelli from estuarine strata in Wyoming. The largest type known as Jaekelopterus Rhenaniae is thought to have reached up to 8 feet, 2 inches in length. The chelicerae and compound eyes of Jaekelopterus indicate it was active and powerful with high visual activity, most likely an apex predator in the ecosystems of Early Devonian Euramerica. Jaekelopterus is classified within the family Pterygotidae in the superfamily Pterygotioidea.[br][br]
[br] Third party image reference[br][br]2) Quetzalcoatlus :[br][br]Quetzalcoatlus northropi is a pterosaur known from the Late Cretaceous of North America and one of the largest known flying animals of all time. It is a member of the family Azhdarchidae, a family of advanced toothless pterosaurs with unusually long, stiffened necks. Skull material from the as of yet unnamed smaller species shows that Quetzalcoatlus had a long sharp beak, with no hook and the end, like a modern stork. Even though it is not a dinosaur. It was a carnivore, probably skimming the water to find prey. When it was first discovered, scientists estimated that the fossil came from a pterosaur with a wingspan of up to 45 feet. A 2002 study suggested a body mass of 200 to 260 kg for Quetzalcoatlus, considerably lower than most other recent estimates. Quetzalcoatlus lived during the late Cretaceous period and died out about 65 million years ago.[br][br]
[br] Third party image reference[br][br]3) Deinosuchus :[br][br]Deinosuchus is an extinct genus of crocodilian related to the modern alligator that lived 82 to 73 million years ago, during the late Cretaceous period. Its main prey were sea turtles and dinosaurs. The fossils were discovered in North America in the 1850s. It was probably capable of killing and eating large dinosaurs. Deinosuchus lived on both sides of the Western Interior Seaway which was an ancient inland sea that divided North America in the Cretaceous. It may have also fed on turtles, fish and other aquatic and terrestrial prey. They all died out in the Cretaceous-Paleogene Extinction Event. While their other relatives survived the extinction, Deinosuchus was not so lucky.[br][br]
[br] Third party image reference[br][br]4) Livyatan :[br][br]Leviathan, properly known as Livyatan melvillei, is a prehistoric whale which lived approximately 13 million years ago during during the Miocene Period. Livyatan is the largest fossil sperm whale discovered and was also one of the biggest known predators, having the largest bite of any tetrapod. It was first discovered in 2008 when fossils of Livyatan were collected from the coastal desert of Peru. When it was first discovered, it was actually given the name Leviathan, a name of a biblical sea monster. Livyatan had a 10 foot long skull, which is a pretty good size. Livyatan was at the very top of the food chain and it must have needed a lot of food. While modern sperm whales mainly eat squid.[br][br]
[br] Third party image reference[br][br]5) Arthropleura :[br][br]Arthropleura was a giant, centipede like arthropod from the Carboniferous period 320 to 299 million years ago and was the largest known land arthropod ever. Fossilized footprints from Arthropleura have been found in many places. It grew 1 to 8.5 feet in length and was covered in hard armored plating. It was able to grow larger than modern arthropods, partly because of the greater partial pressure of oxygen in Earth's atmosphere at that time. Arthropleura was not a predator but a herbivorous arthropod. Arthropleura became extinct at the end of the Carboniferous period, when the moist climate began drying out, reducing the rainforests of the Carboniferous and allowing the desertification characteristic of the Permian.[br][br]
[br] Third party image reference[br][br][br][br]source : TecH[br] |
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发表于 2019-05-24 01:55:05
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