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Brygmophyseter v Deinosuchus
Topic Started: Sep 4 2012, 09:47 PM (5,807 Views)
Taipan
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Brygmophyseter shigensis
Brygmophyseter is an extinct genus of toothed whale in the sperm whale family with one species Brygmophyseter shigensis. The holotype specimen (SFM-0001) was excavated from the Bessho Formation in the Nagano Prefecture in Japan in 1988 by the residents of Shiga-mura with assistance from the staff of the Shiga Fossil Museum. The specimen is nearly complete, and includes a 140 cm (4' 7 ft) long skull. This specimen came from 15–14 million year old sediments. Unlike the extant sperm whale, Physeter macrocephalus, which has teeth in its lower jaw only; Brygmophyseter has 12 functional teeth on each side of the lower jaws and 12 functional teeth on each side of the upper jaws. The holotype specimen is currently on display in the Gunman Museum of Natural History in Japan. The holotype specimen is around 7 metres (23 ft) long. However, in popular culture, Brygmophyseter have been depicted significantly larger in size – up to 12 metres (39 ft) long. Brygmophyseter was likely among the apex predators of its time. It packed a formidable jaws armed with teeth up to 14 cm (5.5 inches) long. It may have employed sonar to track and disorient a prey item in deep waters, like the modern age Sperm Whales. It may also have used its large head to ram a potential opponent during conflict. Brygmophyseter would also have lived in social groups called pods, and probably hunted in packs, like modern age Orcas.

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Deinosuchus rugosus
Deinosuchus is an extinct genus related to the alligator that lived 73 to 80 Ma (million years ago), during the late Cretaceous period. The name translates as "terrible crocodile" and is derived from the Greek deinos (δεινός), "terrible", and soukhos (σοῦχος), "crocodile". The first remains were discovered in North Carolina (United States) in the 1850s; the genus was named and described in 1909. Additional fragments were discovered in the 1940s and were later incorporated into an influential, though inaccurate, skull reconstruction at the American Museum of Natural History. Knowledge of Deinosuchus remains incomplete, but better cranial material found in recent years has expanded scientific understanding of this massive predator. Although Deinosuchus was far larger than any modern crocodile or alligator—measuring up to 12 m (39 ft) and weighing up to 8.5 metric tons (9.4 short tons)—in overall appearance it was fairly similar to its smaller relatives. It had large, robust teeth that were built for crushing, and its back was covered with thick hemispherical osteoderms. One study indicates that Deinosuchus may have lived for up to 50 years, growing at a rate similar to that of modern crocodilians, but maintaining this growth over a much longer period of time. Deinosuchus was probably capable of killing and eating large dinosaurs. It may have also fed upon sea turtles, fish, and other aquatic and terrestrial prey.

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Dark allosaurus
Sep 4 2012, 12:26 PM
Brygmophyseter vs Deinosuchus

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Quiet
Autotrophic Organism
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For the third time, I said I could be wrong. I said if I was wrong then thats my mistake. Richard Ellis did use the ton per foot in his book. Like I said it's a stem physteroid a sperm whale in the example given by Ellis at 50 ft. weighed in at 50 tons. I based the whale on what Ellis said in his book. I made a mistake big whoop I admited it and stated in each of my post I could be wrong.


A site gave Brygmophyseter a weight of 5-10 tons, so at it's max of 10 tons it still outweighs the Deino at 8.5 tons.
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Elosha11
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Even 5-10 tons sounds too heavy for a 7 meter Brygmo. I'd guess more like 3-4.
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Quiet
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Is there a estimated weight stated for Brygmophyseter ?
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Grey
Kleptoparasite
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Quiet, you said you could be wrong and I simply confirmed to you you were.

I doubt Brygmophyseter even reached 10 tons, my personnal guess is that it would be a bit lighter than a killer whale of same BL. But in the same range.
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Quiet
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Okay isn't Brygmophyseter skull longer than a orca and slightly more robust ? I also said between 5-10 tons. If it's about the same size with a longer and more robust skull wouldn't it weigh slightly more than the orca on average? Is there a official estimate on the bryg. weight?
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Grey
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The Brygmophyseter skull is not more robust than the skull of a killer whale.

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Then, I think the skull is irrevelant. As I repeated to other guys, Physeteroids are not orcas. Nothing presumes of a similar or bulkier body shape to my knowledge.

I guess Brygmophyseter to be slighty more slender than a killer whale.
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Quiet
Autotrophic Organism
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Shrugs whatever your opinion.
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Grey
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What ?
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Fishfreak
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Deinosuchus wins, because of it's size, armor and weaponry.
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Vivyx
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Felines, sharks, birds, arthropods
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Deinosuchus wins. It's slightly larger with armour and a stronger bite.
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Ausar
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Even with Deinosuchus rugosus at 7-8 meters and 2.3 tonnes, this would be a good match. Deinosuchus riograndensis would definitely win this.

Edit: or not...is Brygmophyseter really ~3-4t at 7m?
Edited by Ausar, Aug 24 2015, 09:23 AM.
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Super Kaizer Ghidorah
Autotrophic Organism
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Deino wins against brygmo. But if it was a bull modern sperm whale which is way bigger and more muscular deino will loose. Deino will get rammed and bitten by a bull sperm whale.
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retic
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brygmophyseter vs deinosuchus rugosus: 60/40 brygmo
brygmophyseter vs deinosuchus riograndensis: 65/35 deino
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The All-seeing Night
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You are without honor
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Jinfengopteryx
Sep 8 2012, 09:05 PM
yigit05
Sep 8 2012, 08:14 PM
Jinfengopteryx
Sep 5 2012, 02:13 AM
yigit05
 
Brygmophyseter weight
deinosuchus stronger bite
50/50

How he heck has Brygmophyseter a weight advantage? Using a modern sperm whale, it likely wouldn't exeed 3 or 4t. It was just 7m long, nowhere as big as JFC depicted.
Allosaurids
 
Brygmophyseter wins

Could you please give some reasons!
orca weighing over 10 tonnes (9.8 long tons; 11 short tons),brygmophyseter heavier than the killer whale
Why?
It is just 7m long, how it's heavier?
Can you give a source?
deinosuchus is that size on average.
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Ausar
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mechafire
Feb 17 2014, 04:59 PM
Jinfengopteryx
Sep 8 2012, 09:05 PM
yigit05
Sep 8 2012, 08:14 PM
Jinfengopteryx
Sep 5 2012, 02:13 AM
yigit05
 
Brygmophyseter weight
deinosuchus stronger bite
50/50

How he heck has Brygmophyseter a weight advantage? Using a modern sperm whale, it likely wouldn't exeed 3 or 4t. It was just 7m long, nowhere as big as JFC depicted.
Allosaurids
 
Brygmophyseter wins

Could you please give some reasons!
orca weighing over 10 tonnes (9.8 long tons; 11 short tons),brygmophyseter heavier than the killer whale
Why?
It is just 7m long, how it's heavier?
Can you give a source?
deinosuchus is that size on average.
This comment is over a year old. He knows what the real size of Deinosuchus is now. He wasn't even talking about Deinosuchus.

For now, Deinosuchus rugosus should make this fight more even as it is actually in the same weight range as Brygmophyseter, but the larger Deinosuchus species would own this cetacean.
Edited by Ausar, Feb 17 2014, 08:02 PM.
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