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The largest skulls of Paraceratherium are around 1.3 metres (4.3 ft) long, 33 to 38 centimetres (13 to 15 in) at the back of the skull, and 61 centimetres (24 in) wide across by the zygomatic arches. Paraceratherium had a long forehead, which was smooth and lacked the roughened area that serves as attachment point for the horns of other ...
Quetzalcoatlus (/ k ɛ t s əl k oʊ ˈ æ t l ə s /) is a genus of azhdarchid pterosaur that lived during the Maastrichtian age of the Late Cretaceous in North America. The type specimen, recovered in 1971 from the Javelina Formation of Texas, United States, consists of several wing fragments and was described as Quetzalcoatlus northropi in 1975 by Douglas Lawson.
It consists of a partial skull containing parts of the upper jaw and some cranial bones. [2] The skull of Megacephalosaurus is the largest known for any plesiosaur from North America to date. FHSM VP-321 measures 150 centimeters (59 in) in length when measuring along the midline of the cranium and the length of the lower jaw measures 171 ...
A 13,600-year-old mastodon skull was uncovered in an Iowa creek, state officials announced this week. Iowa's Office of the State Archaeologist said in a social media post that archaeologists found ...
Historically, North American paleontologists considered that North American Zygolophodon evolved into Mammut in an endemic fashion while European workers generally thought that Mammut was a Eurasian immigrant that replaced North American Zygolophodon during the Miocene or Pliocene.
Researchers uncovered “remarkably complete” fossils from the skull and jaws of the mammal in rocks that date back to the period just after the extinction of the dinosaurs in the Corral Bluffs ...
The total skull size is the sum of these two measurements. The largest bear ever killed in North America was from Kodiak Island, with a total skull size of 78.1 cm (30.7 in), and eight of the top 10 brown bears listed in the Boone and Crockett record book are from Kodiak. [17]
H. gigas, the largest Hyaenodon species, was much larger, being 378 kg (833 lb) and around 10 ft (3 m). [20] H. crucians from the early Oligocene of North America is estimated to only 10 to 25 kg (22 to 55 lb). H. microdon and H. mustelinus from the late Eocene of North America were even smaller and weighed probably about 5 kg (11 lb). [22]