Poll: Who wins?
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Indian Gaur
0%
0 0%
Josephoartigasia monesi
100.00%
2 100.00%
Total 2 vote(s) 100%
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Indian Gaur v Josephoartigasia monesi
#1
Indian Gaur - Bos gaurus gaurus
The gaur (Bos gaurus), also called Indian bison, is a large bovine native to South Asia and Southeast Asia. The gaur has a high convex ridge on the forehead between the horns, which bends forward, causing a deep hollow in the profile of the upper part of the head. There is a prominent ridge on the back. The ears are very large; the tail only just reaches the hocks, and in old bulls the hair becomes very thin on the back. In colour, the adult male gaur is dark brown, approaching black in very old individuals; the upper part of the head, from above the eyes to the nape of the neck, is, however, ashy gray, or occasionally dirty white; the muzzle is pale coloured, and the lower part of the legs are pure white or tan. The cows and young bulls are paler, and in some instances have a rufous tinge, which is most marked in individuals inhabiting dry and open districts. The gaur is an extremely large mammal. In general measurements are derived from gaurs surveyed in India. Indian gaur males averaged about 840 kg (1,850 lb) (in a sample of 13) and females weigh a median of approximately 700 kg (1,500 lb). 

[Image: 640px-Indian_Gaur_from_anaimalai_hills_JEG5290.jpg]

Josephoartigasia monesi
Josephoartigasia monesi, an extinct species of South American caviomorph rodent, is the largest rodent known, and lived from about 4 to 2 million years ago during the Pliocene to early Pleistocene. The species is one of two in the genus Josephoartigasia, the other being J. magna. The skull of the holotype is 53 cm (21 in) long, and the remaining incisor is more than 30 cm (12 in) in length. The total estimated body length is 3 m (10 ft), with a height of 1.5 m (5 ft). By comparing the skull with various extant species of rodents, the authors of the original paper estimated a mass between 468 and 2,586 kg (1,032 and 5,701 lb), with a median estimate of 1,211 kg (2,670 lb). A later researcher revisited the numbers and came up with a more conservative estimate of 350 to 1,534 kg (772 to 3,382 lb), with a median of 900 kg (2,000 lb). J. monesi is known from an almost complete skull, which was recovered from the San José Formation on the coast of Río de la Plata in Uruguay. Discovered in 1987, but not scientifically described until 2008, the specimen is preserved in Uruguay's National History and Anthropology Museum. Josephoartigasia monesi was named after the paleontologist Álvaro Mones, for his study on the rodent in 1966. The rodent's fearsome front teeth and large size may have been used to fight over females for breeding rights and may also have helped defend against predators, including sparassodonts, short-faced bears and terror birds.

[Image: Josephoartigasia_BW.jpg]


(05-16-2019, 02:23 AM)Lightning Wrote: Josephoartigasia monesi vs African cape buffalo or any other appropriate size bovine.
[Image: wildcat10-CougarHuntingDeer.jpg]
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#2
I think the giant rodent will win at similar sizes. We know modern rats and mice incisors are very dangerous and cause a lot of pain and damage on whatever they attack. The giant rodent's 12 inch incisors would have been terrifyingly formidable and capable of inflicting terrible damage on the gaur. The gaur's relatively small and curved, up-pointing horns won't be able to defeat the giant rodent. Also, the giant rodent's legs seem thicker, so it likely has more stability too.
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  • onlyfaizy786
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#3
Here is an article that shows that the incisors of this rodent could withstand great forces, and were likely used for fighting:

(06-09-2018, 05:17 PM)Taipan Wrote: Biggest rodent 'fought with teeth' like tusks

4 February 2015

Scientists say the largest ever rodent probably used its huge front teeth like tusks, defending itself and digging with them instead of just biting food.

The bull-sized cousin to the guinea pig died out around two million years ago.

Based on a CT scan of its skull and subsequent computer simulations, its bite was as strong as a tiger - but its front teeth were built to withstand forces nearly three times larger.

This suggests that its 30cm incisors were much more than eating implements.

Researchers from York in the UK and Montevideo in Uruguay published the work in the Journal of Anatomy.

Only a single fossilised skull has been found belonging to this 1,000kg South American rodent, known as Josephoartigasia monesi. Unearthed in Uruguay in 2007, the animal lived in the Pliocene period - a warm era when large mammals were relatively abundant, including the first mammoths.

It remains the largest rodent ever discovered.

To study the mechanics of the skull, the team performed a CT scan of the skull and used it to reconstruct a computer model - including its missing lower jaw, which they copied from a related species.

They then tested this model using "finite element analysis", a technique from engineering which calculates stresses and strains in complex objects.

[Image: _80763923_fig-1-cox-cover_zps020a793a.jpg]
The animal's incisors (green) were found to be much stronger than necessary for biting

The forces predicted during biting were large, and similar to a tiger's jaw. But the rodent's big incisors appear "overengineered" even for that sort of strain - and would probably stand up to much stronger forces.

So the researchers believe the front teeth must have been used for tasks that required extra muscles, like the neck, as well as the biting action of the jaw muscles themselves.

"We concluded that Josephoartigasia must have used its incisors for activities other than biting, such as digging in the ground for food, or defending itself from predators," said the study's first author Dr Philip Cox, an anatomist at Hull York Medical School and the University of York.

"This is very similar to how a modern-day elephant uses its tusks."

http://www.bbc.com/news/science-environment-31111843 
[Image: wildcat10-CougarHuntingDeer.jpg]
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  • Claudiu Constantin Nicolaescu, Lightning
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#4
Taipan, do you support the giant rodent too?

Btw, was it an omnivore?
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#5
(05-16-2019, 09:48 PM)Lightning Wrote: Taipan, do you support the giant rodent too?

Btw, was it an omnivore?

If the researchers are accurate in their description, It appears to have a very good chance!
[Image: wildcat10-CougarHuntingDeer.jpg]
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  • Lightning
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#6
Anyone else have an opinion on this?
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#7
Going by the estimates Taipan provided, the rodent should take this at equal weights. Modern rat and squirrels' incisors are strong and tough enough to gnaw through steel, after all.
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#8
I support the gaur face to face but if the rodent can grapple it could beat the bovid by outflanking it.
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