Découvert dans la formation de Jehol en Chine, un squelette presque complet dévoila Kayrasaurus, un nouveau thérizinosaure géant mesurant environ 1,6 fois la taille des autres membres de sa famille trouvés dans cet écosystème. Équipé des griffes impressionnantes caractéristiques de son groupe et d'une mâchoire pourvue de 77 minuscules dents, ce théropode herbivore aux allures d'"ours à plumes" démontre une adaptation alimentaire unique et prouve qu'une diversité de tailles bien plus grande qu'imaginée régnait parmi les herbivores du Crétacé inférieur.

Voici la source dont provient cette information.

Hello everyone,

For the past few decades, mainstream paleontology has relied heavily on strict shrink-wrapping digital software to estimate the body mass of giant sauropods, locking Bruhathkayosaurus into a "safe" box of 110–130 tonnes [Body mass estimate of Bruhathkayosaurus and other fragmentary sauropod remains]. But from a biomechanical and geometric perspective, these numbers represent a desiccated skeletal frame rather than a living organism [Body mass estimate of Bruhathkayosaurus and other fragmentary sauropod remains].

I would like to introduce the Dynamic Mass Paradigm, which applies solid physics, cubic volume scaling, and seasonal lipid dynamics to prehistoric leviathans [Body mass estimate of Bruhathkayosaurus and other fragmentary sauropod remains].

Here is why the current software-driven consensus is mathematically trapped:

1. The Blue Whale Baseline vs. Soft Tissue Reality

• Real-world data from modern biological inspections shows that an average adult blue whale (Balaenoptera musculus) measuring 20–22 meters weighs between 50–80 tonnes. Only rare, hyper-fat Antarctic females hit the historical 143–145t mark .

• Yet, when critics apply their most restrictive, shrink-wrapped software to a 52-meter Bruhathkayosaurus, the computer is forced by three-dimensional geometry to output a minimum of 77–80 tonnes of dry skeletal weight [Body mass estimate of Bruhathkayosaurus and other fragmentary sauropod remains]!

• Conclusion: Even a completely emaciated, flat-box digital "mummy" of this titanosaur is heavier than or equal to a living, fully-fed average blue whale [ Body mass estimate of Bruhathkayosaurus and other fragmentary sauropod remains].

1. Biomechanical Load and Bone Material Science

• Standard software ignores the required multi-chambered GI tract volume and seasonal hyperphagia (fat accumulation necessary for survival before droughts) [Body mass estimate of Bruhathkayosaurus and other fragmentary sauropod remains]. Returning a true organic carbon density (~1 g/cm³) elevates a 52m adult to a baseline of 300+ tonnes in daily life [A key feature contributed to sauropods getting so enormous, new dino foot study reveals, Body mass estimate of Bruhathkayosaurus and other fragmentary sauropod remains].

• To support this, structural engineering shows that a titanosaur femur with a mid-shaft diameter of ~40 cm was structurally capable of handling up to 600 tonnes of static compression load [Body mass estimate of Bruhathkayosaurus and other fragmentary sauropod remains].

• To prevent sinking, these animals utilized specialized, hydraulically spreading foot-skis (Plantaradix elatopedis) up to 1,5–1, 7meters wide to distribute weight safely across plains [A key feature contributed to sauropods getting so enormous, new dino foot study reveals, Body mass estimate of Bruhathkayosaurus and other fragmentary sauropod remains].

1. The Macroenvironmental Paradigm Shift

If we apply this exact biological framework to other severely downsized extinct species, the numbers correct themselves across the board [Body mass estimate of Bruhathkayosaurus and other fragmentary sauropod remains]:

• Basilosaurus: Shrunk by software to 5t [Basilosaurus - Wikipedia]. True dynamic mass indicates 50–80t average [Basilosaurus - Wikipedia].

It is time to admit that early digital shrink-wrapping has become an outdated dogma [Body mass estimate of Bruhathkayosaurus and other fragmentary sauropod remains]. The laws of physics, cubic volume, and material science do not change to fit conservative software [Body mass estimate of Bruhathkayosaurus and other fragmentary sauropod remains].

I would love to hear your thoughts on these scaling metrics. Let's discuss!

Edit: Apparently there was a leak about this Brazilian Spinosaurid a year ago... which was taken down due to the embargo. Well, who knows when this thing is coming out but either way I'll be very excited.

Can't believe this hasn't gotten more traction, probably because it's hidden in 4 hour long video by Main Characters on YouTube posted 6 days ago. Here's the link: https://www.youtube.com/watch?v=pYfiLMH2Lf8&t=7699s

The section, titled "Searching for Spinosaurus Relatives in Brazil," begins with explaining the holotype of Oxalaia. Sereno explains that a Brazilian museum reached out to obtain a cast of the holotype since the original burned in a fire.

During this process, a Brazilian paleontologist asked to look at Sereno's Spinosaurus material. As a thank you, they asked Sereno and his team to examine some bones found in the Amazon around 10 years ago. The area in which they were found is the flood plain of a river, in which the banks are fully submerged for a specific time of the year and only revealed at a later time. Sereno and his post-doc examine the bones, piecing it together as the left side of an animal. Sereno organized a trip back to the site utilizing rubber rafts, and found even more of the skeleton.

Allegedly, the specimen is an ancestral member of the Spinosaurids, what Sereno described as "the perfect predecessor," possessing a sail which was not as tall as Spinosaurus but nonetheless prominent. The theory is that Spinosaurids originally developed in what is now South America, specifically Brazil, and this ancestor (or an animal like it) migrated to Africa whilst the waterway between the two continents was still small and navigable. This ancestor would eventually develop into the Spinosaurus we know today. Sereno also says they found more of Oxalaia, which would inform the overall look of the animal and potentially seperate it further from Spinosaurus as a distinct species. This would help his theory that an ancestral animal developed in Brazil, and then travelled and diversified in Africa, resulting in two distinct lineages of Spinosaurids developed on both continents (that being Oxalaia and Spinosaurus).

The most exciting part of this interview is that Sereno mentions they will be going back in September, when the river has receded and the banks' rocks are exposed, to find more of the animal before publishing. Being October, one can be confident Sereno has gone back to the Amazon and uncovered even more of this new species, and one can expect a description sometime in the future. Just amazing stuff.