#late cretaceous

[makairodonx]

Prince Creek under the Long Night

[doomyte]

Critters from tonight’s Paleostream Flocking!

[cenospire]

A very curious Pyroraptor spots something interesting (a cycad seed) on the forest floor, and is just...tickled pink by it for some reason.

[amnhnyc]

It’s Fossil Friday! If you’ve been inside the Museum’s Hall of Vertebrate Origins, you may have noticed this marine reptile hanging overhead. Meet Thalassomedon haringtoni, a long-necked plesiosaur that lived during the Late Cretaceous some 85 million years ago. This behemoth had a relatively small head and many sharp teeth. Its long, flexible neck probably helped in grasping rapidly moving prey. Plesiosaurs, a group related to lizards, lived in the sea. Although they weren’t dinosaurs, they became extinct at the end of the Cretaceous around 65 million years ago, at the same time as the non-avian dinosaurs.

The Museum is open daily from 10 am–5:30 pm! Plan your visit.

Photo: © AMNH

[theultimatenaturelover]

Aerotitan sudamericanus, an Azhdarchid from the Late Cretaceous with a wingspan of around 5 metres. It was maneuverable both in air and on land, stalking and snapping fish, frogs, lizards, birds and small mammals with it's beak. They are the only known Azhdarchid from South America so far.

Someone had a nice snack! First time trying to draw realistic blood in digital..Not very happy with it but I hope I get better. Currently I'm experimenting with art styles and trying to find what fits me more. I'll be glad to recieve any critique or advices! The colours were based on Swan geese.

[new-dinosaurs]

Lokiceratops rangiformis Loewen et al., 2024 (new genus and species)

(Reconstructed skull of Lokiceratops rangiformis [scale bar = 1 m], with unpreserved portions in gray, from Loewen et al., 2024)

Meaning of name: Lokiceratops = [Norse deity] Loki's horned face [in Greek]; rangiformis = Rangifer [genus of the extant reindeer]-shaped [in Latin]

Age: Late Cretaceous (Campanian), roughly 78.1 million years ago

Where found: Judith River Formation, Montana, U.S.A.

How much is known: Partial skeleton of one individual, including a partial skull, several vertebrae, and some limb bones.

Notes: Lokiceratops was a centrosaurine cereratopsian, making it a horned dinosaur more closely related to Styracosaurus and Pachyrhinosaurus than to Triceratops. It is one of the largest known centrosaurines, with its skull alone being nearly 2 m long.

The skull of Lokiceratops was highly distinctive. A pair of very large, curved horns at the back of its frill pointed out to the sides. Furthermore, a pair of smaller horns closer to the center of the frill was asymmetrical, with one horn being larger than the other. Asymmetrical head ornamentation is also seen in the antlers of reindeer, hence the species name "rangiformis".

Lokiceratops is known from approximately the same time and location as three other centrosaurines, Albertaceratops, Medusaceratops, and Wendiceratops. Despite their diversity, all centrosaurines discovered so far are only known from very narrow ranges in both time and space. This may suggest that these horned dinosaurs diversified rapidly into numerous forms differentiated primarily by display features such as the shape of their horns and frills, with each species lasting only a short time in a small geographic region before evolving into new species or going extinct.

Reference: Loewen​​, M.A., J.J.W. Sertich​, S. Sampson, J.K. O’Connor, S. Carpenter, B. Sisson, A. Øhlenschlæger, A.A. Farke, P.J. Makovicky, N. Longrich, and D.C. Evans. 2024. Lokiceratops rangiformis gen. et sp. nov. (Ceratopsidae: Centrosaurinae) from the Campanian Judith River Formation of Montana reveals rapid regional radiations and extreme endemism within centrosaurine dinosaurs. PeerJ 12: e17224. doi: 10.7717/peerj.17224

[kadalsaurus]

pair of baryonyx nuzzling

sketch

[shattersaurus]

Mosasaurus the sea emperor of the cretaceous

[saritapaleo]

Archovember 2024 Day 21 - Jakapil kaniukura

Jakapil kaniukura was a basal thyreophoran, the group that led to stegosaurs in the Late Jurassic and ankylosaurs in the Cretaceous. In the Early Jurassic, thyreophorans like Scutellosaurus were small and bipedal, eventually becoming the armoured tanks of later eras.

However, Jakapil lived in the Late Cretaceous of Argentina, at the same time as ankylosaurs on other continents, and its discovery represents a previously unknown lineage of thyreophoran in South America. Though fragmentary, its proportions seem to suggest it was bipedal like the early thyreophorans, and it also had distinct teeth that allowed it to chew, rather than shear leaves. Hopefully we can uncover more information about this strange little armored dinosaur in the future.

Jakapil lived in the Candeleros Formation which, in the Late Cretaceous, was an ancient desert called the Kokorkom Desert. This environment was covered in windblown sand, broken up by oases. Here, the tiny Jakapil would have lived in the shadow of sauropods like Limaysaurus and Rayososaurus, and the giant theropod Giganotosaurus. It would have also lived alongside small theropods like Bicentenaria, Buitreraptor, and the alvarezsaurid Alnashetri, as well as pseudosuchians like Araripesuchus, rhynchocephalians like Priosphenodon and Tika, mammals like Cronopio, turtles like Prochelidella, and frogs like Avitabatrachus.

This art may be used for educational purposes, with credit, but please contact me first for permission before using my art. I would like to know where and how it is being used. If you don’t have something to add that was not already addressed in this caption, please do not repost this art. Thank you!

[stavrosskundromichalis]

The iconic Tyrannosaurus rex on a Saturday morning 🦖 Realized that I haven’t made a serious attempt to draw t-rex since the nineties! 😳

[joitiks]

rip king 😔

[makairodonx]

Pencil impression of Sauronitholestes langstoni, a 2-meter-long Late Campanian-Early Maastichtian dromaeosaur from the Dinosaur Park Formation of Alberta that is also essentially Canada’s answer to Velociraptor

[ppaleoartistgallery]

Coahuilaceratops

for those who dont know, i was commissioned to make a press release piece for the recent Coahuilaceratops paper by Barrera-Guevara et al., (2024) and im still quite happy with this piece

[imtrippingdude]

✦The dino stickers are finally complete!!✦

I'd love to know some of your favourites, send me an ✦ask, or reply to this post with prehistoric animals you'd like to see drawn!

✦These are not ready for purchase, but will be once I finish more dino stickers, and finish the rest of the stuff i need to do to set up my shop!

✦HEY, like my art?! If you're interested in my commissions, click here!

[mouserrouser]

"And I have come for you, Gorgosaurus."

Based off the Pachyrhinosaurus who apparently survived having half its face torn off, avoided kicking the bucket for a significant amount of time after that, and was still among the strongest of its herd.

That's a prehistoric Chad. I'm not kidding.

I don't know about dinosaur bone structure that much, but I'm pretty sure bro's brain had regular meetings with the sun.

Built differently.

[theultimatenaturelover]

Acheroraptor temeryorum, a dromaeosaurid known from the latest Maastrichtian Hell Creek Formation of Montana, USA. They are one of the two geologically youngest known dromaeosaurids, the other being Dakotaraptor steini.

I'm back from my artblock! I won't be posting as often as before because of school, but I'll try my best to keep a schedule. For some reason this one looks like a juvenile to me and I didn't know how to fix that. I had a lot of fun drawing this though. The colours were based on Australian hobbies.

Thanks to @thegoofiestcryptid for the suggestion!