#carnosauria

[ildarotyrannus]

Recently I finally finished this painting of Allosaurus jimmadseni. A lot had to be changed along the way. Even the coloring didn't turn out exactly as it does now; the color of the crests had to be changed. Overall, the result is pretty good, but if I could go back to the beginning, I would do a lot differently. And yes, I initially wanted to make the drawing more stylized than detailed, but I couldn't resist and had to rework it many times.

Allosaurus jimmadseni is one of several species in this genus. It was originally described in a dissertation back in 2000 based on a fairly complete skeleton, but remained invalid until 2020, when a new paper was published. Specimens with pathologies, such as Big Al, were classified as this species. The specimen I drew is largely based on this specimen, but I drew a different set of scars. Allosaurus jimmadseni lived contemporaneously with A. fragilis but occupied a different habitat. It differs, among other things, in the presence of ridges along the nose and the shape of the cheekbone.

Adobe Photoshop, 2026.

[hasellia]

Some very quick Spinosaurus mirabilis sketches & notes

DISCLAIMER:

I'm no palaeontologists, I haven't even read the paper yet! The suggestions of biomechanics are just based on my quick, unprofessional observations. To me, S.Mirabilis seems to rely more on the jaw muscles while S.aegypticus relies more on its neck muscles & sheer weight. That is because, based on the comparison diagrams. the jugals (? If that's the right name?) of S.mirabilis seems proportionally more robust than S.aegypticus, who in return has teeth more foreward facing for ensnarement. Again, not a scientist! This is just armchair guessing.

[paleonativeart]

Tameryraptor markgrafi

A new carcharodontosaurid with a weird-speculated horn-like keratin sheath. The latter of which is originally attended as Stormer’s Carcharodontosaurus saharicus from Bahariya Formation that unfortunately lost due to bombing during WW2, but ultimately now revived by describing the new distant species thanks to both lost drawings and a photo taken from 1920’s to all the way to present day.

[makairodonx]

Three Amigos: Allosaurus Edition

Impressions of the three different species of the Late Jurassic carnosaurian theropod dinosaur genus Allosaurus, which lived in Laurasia 155-145 million years ago, from top to bottom: A.fragilis and A.jimmadseni, which both hail from the Morrison Formation of western North America, and A.europaeus, which hails exclusively from the Lourinhã Formation of Portugal.

As an 8.5 to 9.7 meter (28-32 foot) long fleet-footed predator that was capable of making rapid vertical movements with its neck and had a very wide gape which enabled it to bite repeatedly into the flesh of its quarry, strong jaw muscles in spite of its weak bite force, and grasping hands that were armed with large talons, Allosaurus was superbly adapted to prey upon the ornithopods, sauropods, and thyreophorans that were abundant in a semiarid environment that had distinct wet and dry seasons and flat floodplains that were home to river-lining forests of conifers, ginkgoes, horsetails and tree-ferns as well as sprawling fern prairies, and it also shared its habitat with other large, powerful theropod predators such as Ceratosaurus, Marshosaurus and Torvosaurus.

[obscurefossils]

Siamraptor

Siamraptor was a genus of carcharodontosaurian dinosaur from the Early Cretaceous period. Its type species is S. suwati. The holotype was found in the Khok Kruat Formation in northeastern Thailand. Siamraptor is the first and currently only definite carcharodontosaurian known from Southeast Asia.

"Siam" is derived from the original name of Thailand, "raptor" is Latin for robber, and the specific name suwati refers to Suwat Liptapanlop, a supporter of the Northeastern Research Institute of Petrified Wood and Mineral Resources.

Its autapomorphies include a jugal with a straight ventral margin and a deep anterior process below the orbit, a surangular with a concavity and four posterior foramina, a groove along the suture between the surangular and prearticular, an articular with a formen at the suture with the prearticular, a cervical vertebra with an additional foramen that is excavating the parapophysis, and the presence of a pair of foramina at the base of the neural spine on the cervical and posterior dorsal vertebrae. Another possible autapomorphy specific to the genus may be a deep concavity excavating the posterior end of the lateral shelf.

Siamraptor is known from its holotype, consisting of a posterior right mandible including the surangular, prearticular, and articular; as well as referred material from three other individuals including three right premaxillae, a right and left maxillae, a left jugal, two posterior parts of the left mandible, three cervical vertebrae, a caudal vertebra, a manual ungual, a right ischium, a section of the left tibia, and a left pedal phalanx. Siamraptor was recovered as a definite carcharodontosaurian, though its relationships within the clade are uncertain. It may have been a derived member of Allosauria outside of Allosauridae or a basal member of Carcharosauria in a polytomy with Eocarcharia, Concavenator, and Neovenator.

Original paper: Original description paper

Wikipedia article: here

[taphonomenon]

Happy 200th birthday to the OG dinosaur Megalosaurus bucklandii. Made a little sketch in my D&D sketchbook. Also turns out I haven't drawn this thing since nine years ago.

[kararadaygum]

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[greenwingspino]

So Spinosaurus got a new makeover?

Art (c) GreenWingSpino32