Post by dinosauria101 on Sept 25, 2019 14:42:05 GMT 5
Aerosteon riocoloradense
Aerosteon is a genus of tyrannosauroid theropod dinosaur from the Late Cretaceous period of Argentina. Its remains were discovered in 1996 in the Anacleto Formation, dating to the Santonian stage (about 84 million years ago). The type and only known species is A. riocoloradensis. Its specific name indicates that its remains were found 1 km north of the Río Colorado, in the province of Mendoza. They show evidence of a bird-like respiratory system. Aerosteon's name can be translated as air bone and derives from Greek ἀήρ (aer, "air") and οστέον (osteon, "bone"). Aerosteon was a 9 metre (30 ft) long bipedal carnivorous dinosaur that lived approximately 83 million years ago during the Santonian stage. The remains discovered include a single tooth, some cranial bones, a number of partial or complete vertebrae from the neck, back, and sacrum, several cervical and dorsal ribs, gastralia, furcula (wishbone), left scapulocoracoid, left ilium, and left and right pubes. The incomplete fusion of some of its bones indicate that it was not quite fully mature.
images.dinosaurpictures.org/Aerosteon-lostiempos_9139.jpg
Varanus priscus
Varanus priscus refers to an extinct giant goanna or monitor lizard. They were part of the megafaunal assemblage that inhabited southern Australia during the Pleistocene. The youngest fossil remains dated to around 50,000 years ago.[2] The first aboriginal settlers of Australia might have encountered them and been a factor in their extinction.[3][2]
Conservative estimates place the length of the largest individuals at a little over 7 meters (23 ft), with a maximum conservative weight of approximately 1940 kg (4,268 lbs [Molnar, 2004]). Several studies have attempted to establish the phylogenetic position of Varanus priscus within the Varanidae. An affinity with the perentie Varanus giganteus, Australia's largest living lizard, has been suggested based on skull-roof morphology.[8] The most recent comprehensive study[9] proposes a sister-taxon relationship with the large Indonesian dragon, Varanus komodoensis, based on neurocranial similarities, with the lace monitor as the closest living Australian relative. Conversely, the perentie is considered more closely related to Gould's and the argus monitors. Varanus priscus is the largest terrestrial lizard known to have existed. Judging from its size, it would have fed mostly upon medium- to large-sized animals, including any of the giant marsupials such as Diprotodon, along with other reptiles and small mammals, as well as birds and their eggs and chicks.[citation needed] It had heavily built limbs and body and a large skull complete with a small crest between the eyes, and a jaw full of serrated, blade-like teeth.
prehistoric-fauna.com/image/cache/data/Megalania-prisca-2015-738x591.jpg
Credit to Wikipedia
Aerosteon is a genus of tyrannosauroid theropod dinosaur from the Late Cretaceous period of Argentina. Its remains were discovered in 1996 in the Anacleto Formation, dating to the Santonian stage (about 84 million years ago). The type and only known species is A. riocoloradensis. Its specific name indicates that its remains were found 1 km north of the Río Colorado, in the province of Mendoza. They show evidence of a bird-like respiratory system. Aerosteon's name can be translated as air bone and derives from Greek ἀήρ (aer, "air") and οστέον (osteon, "bone"). Aerosteon was a 9 metre (30 ft) long bipedal carnivorous dinosaur that lived approximately 83 million years ago during the Santonian stage. The remains discovered include a single tooth, some cranial bones, a number of partial or complete vertebrae from the neck, back, and sacrum, several cervical and dorsal ribs, gastralia, furcula (wishbone), left scapulocoracoid, left ilium, and left and right pubes. The incomplete fusion of some of its bones indicate that it was not quite fully mature.
images.dinosaurpictures.org/Aerosteon-lostiempos_9139.jpg
Varanus priscus
Varanus priscus refers to an extinct giant goanna or monitor lizard. They were part of the megafaunal assemblage that inhabited southern Australia during the Pleistocene. The youngest fossil remains dated to around 50,000 years ago.[2] The first aboriginal settlers of Australia might have encountered them and been a factor in their extinction.[3][2]
Conservative estimates place the length of the largest individuals at a little over 7 meters (23 ft), with a maximum conservative weight of approximately 1940 kg (4,268 lbs [Molnar, 2004]). Several studies have attempted to establish the phylogenetic position of Varanus priscus within the Varanidae. An affinity with the perentie Varanus giganteus, Australia's largest living lizard, has been suggested based on skull-roof morphology.[8] The most recent comprehensive study[9] proposes a sister-taxon relationship with the large Indonesian dragon, Varanus komodoensis, based on neurocranial similarities, with the lace monitor as the closest living Australian relative. Conversely, the perentie is considered more closely related to Gould's and the argus monitors. Varanus priscus is the largest terrestrial lizard known to have existed. Judging from its size, it would have fed mostly upon medium- to large-sized animals, including any of the giant marsupials such as Diprotodon, along with other reptiles and small mammals, as well as birds and their eggs and chicks.[citation needed] It had heavily built limbs and body and a large skull complete with a small crest between the eyes, and a jaw full of serrated, blade-like teeth.
prehistoric-fauna.com/image/cache/data/Megalania-prisca-2015-738x591.jpg
Credit to Wikipedia