@Randomdinos01

M. Sc. in Zoology and paleontology enthusiast. Loves saurischian dinosaurs and random other megafauna. Scientific advisor for @JFD_001.

Joined October 2019
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Both in the modern day and in the past, the lives of predators are often violent and short. The holotype of Meraxes, believed to have been between 39 and 53 years old when it died, is one of the oldest dinosaurs ever discovered.
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I can't believe it's been almost three years since I posted Spinosaurus! There haven't been any big news in terms of its appearance, but I changed some of my opinions on the cross-scaling between specimens, which ended up giving the animal *slightly* larger hindquarters.
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Recent studies show that the iconic whip-like tail of sauropods like Diplodocus could swing at speeds of over 110 km/h (73 mph). While it may not be as fast as an actual bullwhip, it's more than enough to make a potential predator reconsider.
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Deinosuchus reference, the second largest, and one of the most popular crocs in the world, with a proportonally inmensely head Very fond of water, not so much at land. Giant turtle crusher and the bane of any dinosaur taking a swim on the western interior seaway, HD link below
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Pycnonemosaurus was first described as a medium-sized abelisaurid, about 6.5 meters long. Most fragmentary fossil taxa tend to get lower size estimates as we learn more about them, but later studies actually revealed Pycnonemosaurus to be much larger than previously thought!
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Aucasaurus garridoi is a moderately sized, long snouted Abelisaur from the Anacleto formation of Argentina. It鈥檚 known from one articulated specimen, that is heavily weathered. Aucasaurus was contemporary with animals as Abelisaurus, Aerosteon, and Antarctosaurus.
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It may be fragmentary, but some of the indeterminate loricatan material here (estimates based on @LiterallyMiguel's skeletal reconstructions!) is actually terrifying.
Literally Miguel 馃嚮馃嚜馃挜馃敨@LiterallyMiguelJun 18
馃獎PRESTO!馃獎 Skeletals of several Prestosuchus specimens or well... "Prestosuchus", as there are definitely multiple taxa in here distinct from the holotype, its a bit of a brazilian loricatan waste-basket... (some really large!) one-by-one down on replies!
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馃獎PRESTO!馃獎 Skeletals of several Prestosuchus specimens or well... "Prestosuchus", as there are definitely multiple taxa in here distinct from the holotype, its a bit of a brazilian loricatan waste-basket... (some really large!) one-by-one down on replies!
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Many people asked me if I know for sure that Tyrannotitan had a hump on its tail. We know that it had a very tall anterior caudal (Tyrannotitan material in white), but the rest of the tail has to be inferred from close relatives, with Meraxes having the best-preserved one.
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Don't worry guys @mj_man1 figured it out
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Tyrannotitan is not nearly as famous as its larger relatives Giganotosaurus or Carcharodontosaurus, despite its flashy name. Unlike those two, however, Tyrannotitan has a detailed osteology, so it's winning in my book.
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Tylosaurus specimens have been found with stomach contents including the remains of turtles, sharks, sea birds, plesiosaurs, and even other mosasaurs. For the Lizard King, everything in the Cretaceous seas was a potential meal.
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Alternate version with a bit more soft tissue on the neck. It's not clear if they had a seamless transition from head to body, like ichthyosaurs and cetaceans, or necks more like regular lizards.
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Over 60% of the length of the plesiosaur Albertonectes is made up of its neck, which is the longest relative to body size of any animal ever discovered. At 76, it has more vertebrae in the neck alone than most species have in their entire bodies.
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The traditional concept of "Alamosaurus" is now believed to represent multiple different species of large North American titanosaur. Some of these have been suggested to be relatives of South American lognkosaurs like Patagotitan and Puertasaurus, though this is far from certain.
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While its anatomy is not as thoroughly studied as that of T.rex, well-preserved skeletons in multiple stages of growth allow us to reconstruct the life history of Tarbosaurus much more clearly than its North American cousin's... especially after Zanno & Napoli (2025).
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Starting off 2026 with a remake of one of my oldest works, Patagotitan! Even though it's not the largest, the completeness of its remains makes it one of the most impressive dinosaur discoveries. Seeing a cast of the skeleton in person was absolutely breathtaking.
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Merry Christmas! While the genus Acrocanthosaurus is currently only known from a single species, differences in the skull of the largest known specimen suggest that the giant sail-backed carcharodontosaurs may have been more diverse in North America than we thought.
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Update: I forgot to fill part of the lacrimal with white, it's not so freakishly thin at the bottom.
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Shuvosaurus is one of the most incredible cases of convergent evolution in fossil reptiles - it was mistaken for an ornithomimid dinosaur for more than a decade, but as a pseudosuchian, it's more closely related to crocodylians than to any dinosaur.
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