Just a half-flock today, with duonychus and brachycrus :)
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Just a half-flock today, with duonychus and brachycrus :)

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Duonychus✌️
I've always had the idea that the concept of very densely-feathered therizinosaurids would look interesting combined with the intricate patterns that many heavy ground birds exhibit.
The great bustard was a suggestion from a friend :) I have many more personal ideas on which therizinosaurids to "mix" with other ground birds (especially phasianids) though, so i'll definitely be playing around more with this concept in the future!
duonychus tsogtbaatari sketch
Duonychus tsogtbaatari was a therizinosaurid dinosaur living in what is now the Gobi Desert in southern Mongolia during the Late Cretaceous, around 96-90 million years ago.
Like other therizinosaurids it would have been a chunky-bodied herbivore with a small beaked head atop a long neck, long rake-like claws on its hands, stout legs, and a rather short tail. But it was rather small compared to most of its close relatives, estimated at about 3m long (~9'10"), with its known fossil remains including several vertebrae, partial ribs and pelvis, and a set of nearly-complete arms and hands.
Its hands had only two well-developed fingers, with a small splint-like vestigial third finger, an anatomical condition convergently seen in some other theropod groups but previously unknown in therizinosaurids. One of its long curved claws also preserved a rare example of a thick keratinous sheath, showing that in life the claw was over 40% longer than its bony core.
Duonychus' elbow and finger joints had a fairly limited range of motion – more similar to the forearms of Tyrannosaurus than other therizinosaurids – but its claws were able to flex almost 90° at the tips of its fingers, which may have given it the ability to reach out and grab onto foliage with a very strong and precise grip.
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Illustration of Duonychus tsogtbaatari, the strange, newly-described, two-clawed therizinosaur that lived about 96-90 million years ago during the early late Cretaceous (Cenomanian-Coniacian) of what is now Mongolia’s Bayanshiree Formation and coexisted with the basal tyrannosaur Khankhuuluu mongoliensis
#Paleostream 29/03/2025
here's today's #Paleostream sketches!!! we had a shorter flocking today to save energy for #PaleostreamCon2025 (which is in ~2 hours at the time of posting 😉)
today we sketched just Duonychus, and Brachycrus
Duonychus tsogtbaatari