Post by dinosauria101 on May 8, 2019 9:05:55 GMT 5
Dinocrocuta gigantea
Dinocrocuta is an extinct genus of hyena-like feliform carnivores. It lived in Asia, and Africa, during the Miocene epoch. It had very strong jaws that were able to crush bones. It's estimated to weight roughly 400 kg. Although Dinocrocuta looks very much like a hyena and despite the fact that it shares many of the bone cracking adaptations that hyenas do, it is not one of them. Instead it belongs to Percrocutids, group of enigmatic carnivorans with high degree of convergence with true hyaenids, but differentiated from them based on dental and basicranial characters. It was originally described from dental remains discovered from Chinese drugstore in 1903 by Schlosser. Schlosser Placed it as new species of Hyaena (Hyaena gigantea). It was not placed into genus Dinocrocuta till the discovery of first skull in 1988. At this time it came truly clear how distinctive this animal really was. It was big (Duh!), with condylobasal length about 32 cm (In comparison brown bear skull is somewhere around 35 cm). Skull has distinct stepped profile with deep zygomatic arches and massive post canine teeth. It is quite clear to any observer that this skull is constructed for power and the clear convergence with true hyaenids indicates similar ecological niche. To test exactly how well Dinocrocuta would do in a bone crunching task, the skull was run trough finite element analysis (Tseng, 2009). Tested against modern greywolf and spotted hyena, Dinocrocuta performed as expected, experiencing less stress on premolar 3 and 4 bite than either of it's rivals in this study.
Utahraptor ostrommaysorum
Utahraptor (meaning "Utah's predator" or "Utah thief") is a genus of theropod dinosaurs, including the largest known members of the family Dromaeosauridae. Fossil specimens date to the upper Barremian stage of the early Cretaceous period (in rock strata dated to 126 ± 2.5 million years ago). It contains a single species, Utahraptor ostrommaysorum. The holotype specimen of Utahraptor is fragmentary, consisting of skull fragments, a tibia, claws and some caudal (tail) vertebra. These few elements suggest an animal about twice the size of Deinonychus. Like other dromaeosaurids, Utahraptor had large curved claws on their second toes. One claw specimen is preserved at 22 centimetres (8.7 in) in length and is thought to reach 24 centimetres (9.4 in) restored. The largest described U. ostrommaysorum specimens are estimated to have reached up to 7 m (23 ft) long and somewhat less than 500 kg (1,100 lb) in weight, comparable to a grizzly bear in size. Some undescribed specimens in the BYU collections may have reached up to 11 m (36 ft) long, though these await more detailed study.
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Credit to Wikipedia
Dinocrocuta is an extinct genus of hyena-like feliform carnivores. It lived in Asia, and Africa, during the Miocene epoch. It had very strong jaws that were able to crush bones. It's estimated to weight roughly 400 kg. Although Dinocrocuta looks very much like a hyena and despite the fact that it shares many of the bone cracking adaptations that hyenas do, it is not one of them. Instead it belongs to Percrocutids, group of enigmatic carnivorans with high degree of convergence with true hyaenids, but differentiated from them based on dental and basicranial characters. It was originally described from dental remains discovered from Chinese drugstore in 1903 by Schlosser. Schlosser Placed it as new species of Hyaena (Hyaena gigantea). It was not placed into genus Dinocrocuta till the discovery of first skull in 1988. At this time it came truly clear how distinctive this animal really was. It was big (Duh!), with condylobasal length about 32 cm (In comparison brown bear skull is somewhere around 35 cm). Skull has distinct stepped profile with deep zygomatic arches and massive post canine teeth. It is quite clear to any observer that this skull is constructed for power and the clear convergence with true hyaenids indicates similar ecological niche. To test exactly how well Dinocrocuta would do in a bone crunching task, the skull was run trough finite element analysis (Tseng, 2009). Tested against modern greywolf and spotted hyena, Dinocrocuta performed as expected, experiencing less stress on premolar 3 and 4 bite than either of it's rivals in this study.
Utahraptor ostrommaysorum
Utahraptor (meaning "Utah's predator" or "Utah thief") is a genus of theropod dinosaurs, including the largest known members of the family Dromaeosauridae. Fossil specimens date to the upper Barremian stage of the early Cretaceous period (in rock strata dated to 126 ± 2.5 million years ago). It contains a single species, Utahraptor ostrommaysorum. The holotype specimen of Utahraptor is fragmentary, consisting of skull fragments, a tibia, claws and some caudal (tail) vertebra. These few elements suggest an animal about twice the size of Deinonychus. Like other dromaeosaurids, Utahraptor had large curved claws on their second toes. One claw specimen is preserved at 22 centimetres (8.7 in) in length and is thought to reach 24 centimetres (9.4 in) restored. The largest described U. ostrommaysorum specimens are estimated to have reached up to 7 m (23 ft) long and somewhat less than 500 kg (1,100 lb) in weight, comparable to a grizzly bear in size. Some undescribed specimens in the BYU collections may have reached up to 11 m (36 ft) long, though these await more detailed study.
Credit to Wikipedia
