some dinosaur king style chibi dinosaurs, apparently this is all the way back from 2020, might remake it ar some point, but to be honest machairo is the only one im not happy with because of the color scheme
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nothronychus mckinleyi - therizinosaurid - late cretaceous
a Very tall lady with some Quite impressive talons- i dont doubt the upkeep is a hassle! a study in this specific species of nothronychus (one of two, the other being n. graffami) and other therizinosaurs showed the family had very well developed senses useful for foraging! another future re-examination of n. mckinleyi's braincase in particular suggested an inclination to hearing low frequency sounds, meaning nothronychus likely had complex social behaviors- possibly even comparable to today's elephants!
higher resolution version under the cut!
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Nothronychus mckinleyi, discovered in a part of the U.S. that was once thought to be part of the Western Interior Seaway. However, Nothronychus is obviously a terrestrial animal, and its bones were probably around 100 kilometers from what would’ve been the shoreline back then.
With Hatsune Miku for scale:
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Nothronychus graffami was a medium-sized therizinosaur from the late Cretaceous of Utah. Though significantly smaller and older than its more famous and larger relative, Therizinosaurus, it still shows the hallmarks of this strange group of theropods. Scythe-like claws, a large gut, a long neck ending in a beak, and wide feet with four toes contacting the ground mark Nothronychus as a heavy set and stable herbivore.
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I love paleoart. I don’t love that it’s mostly animals doing some variation on the theme of RAWR. That’s boring. So here’s a therizinosaur (Nothronychus) waving hi and being a big floofy goof, because no one can prove they weren’t.
Color scheme based on our modern day floofy goofy dinosaur with thoracic limb claws, the hoatzin.
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Suskityrannus vs Maip
Factfiles:
Suskityrannus hazelae
Artwork by Andrey Atuchin, written by @zygodactylus
Name Meaning: Hazel Wolfe’s Coyote Tyrant
Time: 92 million years ago (Turonian stage of the Late Cretaceous)
Location: Moreno Hill Formation, Zuni Basin, New Mexico
When you follow the progress of paleontology long enough, you start to see things that were previously left undescribed actually get names and the respect they deserve - whether its the “putative screamer” Anachronornis or the “Zuni Coelurosaur” Suskityrannus, you’re sure to get a nice moment and a sense of satisfaction from it. Suskityrannus has been well known for a while due to it being featured in both When Dinosaurs Roamed America as well as Planet Dinosaur. Thought at various times to be a basal Coelurosaur or Tyrannosauroid, its official description placed it somewhat derived within Tyrannosaurs, showcasing the evolution of the Tyrannosaur group as it transitioned from the smaller more speedy forms (like Suskityrannus) to the giant murder birds we know and love later in the Cretaceous. In fact, Suskityrannus lived in an ecosystem that highlighted its changing world, with many early representatives of the later iconic North American Cretaceous ecosystems showing up in early forms in Moreno Hill. Suskityrannus was about one meter tall and three meters long, and already had many adaptations known from later tyrannosaurs. In the forested coastal ecosystem at Moreno Hill, Suskityrannus would have been neighbors with Zuniceratops, Nothronychus, Jeyawati, ankylosaurs, fish, and turtles.
Maip macrothorax
Artwork by @i-draws-dinosaurs, written by @zygodactylus
Name Meaning: Long-chested Shadow of Death
Time: 72 to 66 million years ago (Maastrichtian stage of the Late Cretaceous)
Location: Chorrillo Formation, Patagonia, Argentina
Megaraptors, a group not even really understood a few decades ago, just keep having more and more interesting members added to this group - Maip, a recent addition known from many bones of the trunk and tail, help fill out more of this picture with remains not known from other Megaraptors, and als having the most complete Megaraptor skeleton known. Maip was also interesting in having a very long, thick torso, leading to its specific name. It probably reached 9 to 10 meters in length in life, making it the largest Megaraptor known (literally reaching carcharodontosaurid size), and it may indicate that megaraptors rose to high-level predator status as other top predators went extinct in the region. It had a respiratory system similar to modern birds, with unidirectional air flow, much like other Saurischian dinosaurs. Living in southernmost South America, Maip would have had to deal with a variety of harsh climates, and may have been covered in feathers in order to keep warm. In addition to mosasaurs, snakes, turtles, mammals, fish, and frogs, Maip lived with other dinosaurs such as Nullotitan, Kookne, Yatenavis, and Isasicursor.
DMM Round One Masterpost
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Happy Fossil Friday!
Who: Therizinosaurus cheloniformis
name meaning: "Scythe Lizard" "Turtle Formed"
pronunciation: Ther-i-zine-oh-sore-us kell-on-i-form-iss
What: A large, probably herbivorous theropod
When: Late Cretaceous
Where: Nemegt Formation in the Gobi Desert in Mongolia
Fun fact!: An original description of Therizinosaurus the material was thought to have belonged to a gigantic turtle with huge three foot long claws. This original material was found among much Mongolian turtle material, however reexamination of the specimen showed that it was actually a part of a very interesting dinosaur instead.
Why are they cool?: As one of the few theropods with proposed herbivorous habits, it is an excellent example of convergent evolution (def: the independent evolution of features that appear reminiscent of features that appear in multiple organisms that have no common ancestry, e.g. wings in bats and birds).
The arms of Therizinosaurus have been notably compared to herbivorous mammals such as the Giant Ground Sloth and proposed to employ similar feeding styles of retrieving vegetation for consumption as well as digging for roots in the earth.
Image Credits: (Left: A representative of the Therizinosaurid group not of Therizinosaurus proper - Nothronychus from the Natural History Museum in Utah. Photo taken by M. Rhodes (2019) Right: TheStompingLand.com)
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Fossil Friday!
This is Falcarius.
He is an early therizinosaur from the Cedar Mountain Formation in the Yellow Cat Member. He is about 13ft long and is the basal most therizinosaur showing a transition from traditional theropod body plan to the therizinosaur one.
Look how tiny he ia beside cousin Nothronychus!
Many different ontogenetic stages have been found (growth stages) with the smallest being just over 3ft.
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