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Who wins?
Dinocrocuta gigantea 3 (50%)
Hyaenodon gigas 3 (50%)
Total Votes: 6
Dinocrocuta gigantea v Hyaenodon gigas
Topic Started: Mar 20 2014, 02:20 PM (3,263 Views)
Taipan
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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 grey wolf 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.

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Hyaenodon gigas
Hyaenodon ("hyaena-toothed") is an extinct genus of Hyaenodonts, a group of carnivorous creodonts of the family Hyaenodontidae endemic to all continents except South America, Australia and Antarctica, living from 42—15.9 mya, existing for approximately 26.1 million years. Typical of early carnivorous mammals, the Hyaenodon had a very massive skull but only a small brain. It had a long skull with a narrow snout - much larger in relation to the length of the skull than in canine carnivores, for instance. Its neck was shorter than its skull, while its body was long and robust and terminated in a long tail. Despite the name, these creatures are not related to hyenas. H. gigas, the largest Hyaenodon species was much larger, being 500 kilograms (1,100 lb) and around 10 feet.

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mechafire
Mar 20 2014, 12:29 PM
Dinocrocuta gigantea vs Hyaenodon gigas
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Vivyx
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Felines, sharks, birds, arthropods
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Hyaenodon wins, it is much larger and has an equally strong if not stronger bite force then the Dinocrocuta. I don't think the Dinocrocuta has what it takes to handle a Hyaenodon
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The All-seeing Night
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Catboy
Mar 21 2014, 04:45 AM
Hyaenodon wins, it is much larger and has an equally strong if not stronger bite force then the Dinocrocuta. I don't think the Dinocrocuta has what it takes to handle a Hyaenodon
Its only 100 kg heavier, and dinococruta is more robust. The dinocrocuta probably has more crushing power in its jaw thanks to its high sagittal crest, better teeth for crushing, and shorter more compact head.
Edited by The All-seeing Night, Mar 21 2014, 11:39 AM.
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Bandog
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Everything else is just a dog.
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I'm not sure about the weights that are so often quoted for h.gigas so I'm not quite.
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blaze
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Neither are as big as claimed in the op.

The largest specimen that I know of D. gigantea is one still undescribed but mentioned in a blog affiliated to the ivpp, it's a recent discovery, a complete skeleton of an specimen with a 43cm long skull and a head-body length of 1.8-1.9m. D. gigantea is, at most in the size range of an average male lion or male tiger (the skull is proportionally longer though due to the sagittal crest).

Van Valkenburgh (1987) gives measurements of two specimens of two species of Hyaenodon, a Hyaenodon horridus with a skull 29cm in condylobasal length and a head-body length of 107.4cm, and a Hyaenodon crucians with a condylobasal length of 18cm and a head-body length of 70cm, the skull then is around 26.5% of the head-body length. Morlo & Nagel (2006) mention that H. gigas was similar in size to Hyainailouros fourtaui which they mention has an estimated skull length of ~60cm, looking at images of the skull of Hyaenodon, condylobasal length is around 96% of total length so an upper estimate for H. gigas is a skull 58cm in condylobasal length which will give us a head-body length of 219cm, take into account that its head is proportionally big compared to modern carnivorans and is increasing the head-body length by probably as much as 20cm and you are looking at an animal (again) in the size range of average male lions and male tigers.

Edited by blaze, Mar 21 2014, 03:04 PM.
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Bandog
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Everything else is just a dog.
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At least the estimates end up roughly similar then lol

Edit: is that blog the only mention of the new dinocrocuta specimen?
Edited by Bandog, Mar 21 2014, 05:48 PM.
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