r/Naturewasmetal

From my own overall consilution outcomes via based on the overall studies of the Livyatan Melvillei in paleontology;

A hypothetical 20-meter (65-foot) long bull male Livyatan melvillei would be one of the heaviest, most destructive mammalian predators to ever exist.

While the only discovered fossil specimen (the holotype) is estimated to have been between 13.5 and 17.5 meters long,a bull male individual up to 20 meters,a size reached by some modern bull sperm whales,results in terrifying dimensions.

Estimated Weight: 85 to 120 Metric Tonnes

Because whales are highly robust and volumetrically massive, scaling a Livyatan up to 20 meters causes its weight to explode exponentially due to the cube law.Based on the holotype’s conservative estimate of 57 tonnes at 17.5 meters,a 20-meter bull male individual would weigh roughly 85 tonnes.Recent 3D reconstructions suggest the holotype was much bulkier,tracking at nearly 80 tonnes for a 17.5-meter specimen.Under this model,a 20-meter monster would weigh a staggering 115 to 120 tonnes.This makes it heavier than a modern fin whale and nearly on par with a blue whale,but built entirely for raptorial,bone-crushing predation.

A 20-meter Livyatan would carry a colossal, robust skull measuring between 3.5 and 4 meters long.Its teeth would scale up from the holotype’s 36 cm (14 inches) to a terrifying 42+ cm (16.5 inches) long and over 15 cm in diameter.They remain the largest biting teeth in animal history.Unlike modern sperm whales (which only have functional teeth on the bottom jaw for suction feeding),Livyatan had massive interlocking teeth on both the top and bottom jaws.Livyatan by average already possessed an enormous temporal fossa,leaving room for massive jaw muscles.A 20-meter bull would exert a bite force estimated to exceed possibily 100,000+ Newtons (approx. 22,000+ lbs of force), easily snapping the ribs and spines of large marine mammals.It housed a giant spermaceti organ in its forehead.Propelled by its massive fluke,a 100-ton Livyatan swimming at top speeds could use its head as a battering ram.This would deliver millions of joules of kinetic energy,enough to instantly fracture the internal anatomy of a rival or even potentioaly a maximum-sized Megalodon.At this size,it would occupy a macro-predatory niche similar to a killer whale but scaled up over ten times.It could comfortably hunt 10-to-15-meter baleen whales as routine prey.

So what you guys honest consulitions of results and verdic reacher of this idea of an Bull Male Livyatan?

"Lifted"

A drastic change in the weather of the cold and temperate climate of the Qiketai Formation of the middle Jurassic. A small herd of Xinjiangtitan are alerted by this sudden change with their instincts telling them to move away from the area.

Unfortunately recent however, an old member of the group had fallen dreadfully ill causing them to get left behind, as the approaching winds had settled and formed a huge raging tornado. The ill fated member can only watch as it is lifted off the ground.

killer whale 9.5m 15t

Mosasaurus 13m 11t

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The ground sloth diving is Megalonyx

1. many museums prop open the entire jawbone for easier display, the exhibited specimens are generally much wider than they would be in their normal state.

2.All the muscles responsible for biting in sharks are located in front of the jawbones.The QMD (temporarily translated as quadrato-mandibularis dorsalis) attached to the posterior side of the quadrate cartilage, and the QMV attached to the posterior side of Meckel’s cartilage, have no clear boundary in living specimens and converge at the corner of the mouth.However, anatomically, the QMD slightly wraps downward around the top of the QMV. These two muscles can generate the powerful bite of the megalodon. Based on a 240 kg great white shark’s bite force of 3,200 N, and calculating with a pennation doubling effect to 6,400 N, we can proportionally scale up to a 100-ton megalodon. Its extreme bilateral bite force could reach 350,000 N, and at the 75% position toward the jaw tip, the bite force converts to roughly 35 tons.

3.The only specimen currently with reconstruction value is the holotype of Livyatan MUSM 1676. Its skull is nearly 3 meters long and nearly 2 meters wide. Both Melville’s whale and the megalodon essentially rely on cranial material to estimate their head-to-body ratio, and then use living close relatives as references to infer total body length. At present, we can only determine that the head of Livyatan may have exceeded that of any megalodon. 

Basilosaurus is rarely mentioned as one of the deadliest predators in history, when for 7 million years it terrorized the oceans in the Eocene, he had a terrorific power in his bite and was the biggest marine creature in the Eocene. He deserves being in the spotlight as one of the deadliest predators ever just like Mosasaurus and Megalodon, rather than just being a prehistoric and primitive whale, and the fact of only seeing him from his evolutionary aspect as a whale, instead of what he was as a predator.

Jaw of the megalodon 311000 and the holotype of Livyatan melvillei.

（The tooth rows used for the megalodon is Perez’s tooth row. ）

The largest land animals in Earth's history didn't start out as giants. Early sauropods were relatively small, but over millions of years, different groups independently evolved into colossal dinosaurs, proving that gigantism was one of nature's most successful strategies.

A clip from the video

Is it a coincidence that Megalodon appeared around this time period ?

13.5m～17.5m 40t～70t+（Maximum estimate: 80 tons）

Here’s my second of 4 illustrations of Microraptor by me. In this drawing, Microraptor is seen about to snatch a fish out the water like how a Bald Eagle snatches fish out the water today but unlike a Bald Eagle, Microraptor is a nocturnal animal like an owl but if that owl had sex with a peregrine with someone lizard thrown in.

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So, mystery Pleistocene big cat Feliopsis has been suggested as part of a lost lineage of crocodile-hunting pantherines that also includes the older Pachypanthera.

With 5 million years between them, I can totally see the Pleistocene form as a derived water tiger of sorts! :B

Here, in the temperate forests of what will one day become eastern Asia, we have travelled back 128 million years.
Suddenly... a sudden rush of movement. A Psittacosaurus lujiatunensis is running... running for its very life. Desperate to shake its pursuer, it makes a tactical retreat... slipping into the safety of the deeper water.
The hunter emerges. It is a Dilong paradoxus. But this is no seasoned killer. It is a mere juvenile... a youngster, simply practicing the vital skills it will need to survive in adulthood. It pauses at the water's edge, calculating... evaluating... testing the depth of this aquatic barrier.

In this lush, prehistoric world, an abundance of resources fuels a remarkably diverse host of unique fauna... and flora. And here, just beneath the surface, lies perhaps one of the most significant organisms of all.
At first glance, it appears rather unassuming. This... is Archaefructus. It is an aquatic plant, but it carries a profound secret. This fragile green stem is one of the earliest known angiosperms... the very first flowering plants.
Right now, it is a rare curiosity. But in just forty million years' time, this revolutionary group of plants will diversify at an astonishing rate... ultimately spreading across the globe, and changing the face of our planet forever.

I do hope I nailed the Sir David Attenborough accent.😆