#Daspletosaurus wilsoni

[fossilprep]

Sisyphus, holotype of Daspletosaurus wilsoni is now on display at Badlands Dinosaur Museum! The cranial elements will be added after they undergo CT scanning.

[new-dinosaurs]

Daspletosaurus wilsoni Warshaw & Fowler, 2022 (new species)

(Maxilla [bone in the upper jaw, top] and reconstructed skull [bottom] of Daspletosaurus wilsoni, with preserved bones in white, from Warshaw and Fowler, 2022)

Meaning of name: wilsoni = for John Wilson [discoverer of the original fossil]

Age: Late Cretaceous (Campanian), probably around 76.5 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, some vertebrae, and a foot bone.

Notes: D. wilsoni was a tyrannosaurid theropod, making it a fairly close relative to Tyrannosaurus. Two other species of Daspletosaurus have previously been named, the slightly older D. torosus and the slightly younger D. horneri. D. wilsoni exhibits a mixture of traits seen in the other two species. Combined with its intermediate geologic age, the describers of D. wilsoni suggest that the three named species of Daspletosaurus formed a direct line of descent, with D. wilsoni having descended from D. torosus and given rise to D. horneri.

Reference: Warshaw​, E.A. and D.W. Fowler. 2022. A transitional species of Daspletosaurus Russell, 1970 from the Judith River Formation of eastern Montana. PeerJ 10: e14461. doi: 10.7717/peerj.14461

[actual-haise]

Daspletosaurus wilsoni is a tyrannosaurid described in 2022 from the Judith River Formation in Montana (USA).

[manusuchus]

"Eyelids of Morning"

Two young Daspletosaurus wilsoni patrol their newly acquired territory.

[inhuman-species]

[3D reconstruction] [Daspletosaurus wilsoni]

On arrive bientôt au bout du travail. Impression 3d à l'échelle 1:4 pour vérifier l'articulation de la mâchoire inférieure et l'inclinaison des dents du prémaxillaire.

Soon my work will be finished. 3D printing at 1:4 scale to check the articulation of the lower jaw and the inclination of the premaxillary teeth. Facebook page

[mesozoicmarket]

A dinosaur tooth of an indeterminate tyrannosaurid, either Daspletosaurus sp. or Gorgosaurus libratus from the Judith River Formation in Hill County, Montana, United States. Unfortunately, the vast majority of teeth of Gorgosaurus and Daspletosaurus are indistinguishable from one another. There are currently two species of Daspletosaurus described from this deposit, Daspletosaurus torosus and Daspletosaurus wilsoni. The tooth has an interesting red coloration and pronounced enamel texture. The midline distal serration density is 13/5mm, while the midline mesial serration density appears to be the same, though very worn down, and around 15/5mm towards the base.

[justgoji]

Daspletosaurus wilsoni. I think I made the head too small unfortunately :(

With Hatsune Miku for scale:

[paleonativeart]

Last day of the Judith River July challenge month is officially Day 11 (or even 31): Daspletosaurus wilsoni.

[greenfrog04]

Re-analysis of a dataset refutes claims of anagenesis within Tyrannosaurus-line tyrannosaurines (Theropoda, Tyrannosauridae)

Published 28th November 2023

Phylogenetic reanalysis of Daspletosaurus wilsoni reveals a cladogenetic Tyrannosaurinae composed of four morphologically and biogeographically distinct clades that are formally defined and diagnosed (Teratophoneini clade and Tyrannosaurini).

Cladistic analyses strict consensus phylogeny of Tyrannosaurinae

Stratigraphic distribution of the species of Daspletosaurus

Source:

[karayoluhaber]

T-Rex'in Korkutucu Akrabası Keşfedildi

T-Rex’in Korkutucu Akrabası Keşfedildi

Yakın zamanda keşfedilen evrimsel bir “kayıp halka” türü, çok büyük ve iyi bilinen bir zincirin çok büyük ve korkutucu bir halkasıydı. Keşfin Daspletosaurus wilsoni türünün Tyrannosaurus Rex’in doğrudan atası olduğuna inanılıyor. Göz çukurunun üzerinde “boynuzcuklar” olarak bilinen bir dizi çıkıntı gibi ayırt edici bir yüz özellikleri koleksiyonuna sahipti. Herkes Kretase Dönemi besin zincirine…

[thitranthanh]

Hóa thạch 76,5 triệu năm tiết lộ tổ tiên của T-rex

Hóa thạch 76,5 triệu năm tiết lộ tổ tiên của T-rex

Các nhà khoa học đã phát hiện ra một loài khủng long ăn thịt chưa từng được biết tới, có thể là tổ tiên của khủng long bạo chúa. Mô phỏng loài khủng long ăn thịt mới có thể là tổ tiên của T-rex. Ảnh: BDM Theo nghiên cứu xuất bản trên tạp chí Paleontology and Evolutionary Science vào cuối tháng 11, loài khủng long mới được đặt tên là Daspletosaurus wilsoni có thể dài từ 8 đến 10 m. Hóa thạch 76,5…

[fossilprep]

With the completion of the cervical block, the holotype of Daspletosaurus wilsoni has been fully prepared. Approximately 350 hours shared between both Annamarie Fadorsen and I.

[iknowdino]

Episode 418: A brand new tyrannosaur with Elias and Denver

I Know Dino Podcast Episode 418: An interview with @eliaswarshaw & @df9465 from @D_MuseumCenter about the new tyrannosaur, #Daspletosaurus wilsoni, that they just named. Plus new details on the megapredator Meraxes, T. rex maximum size, and more.

Episode 418: A brand new tyrannosaur with Elias and Denver. The new tyrannosaur named Daspletosaurus wilsoni. Plus new details on the megapredator Meraxes, estimates for the largest T. rex that ever lived, and more. News: Presentations from the Theropods session of SVP 2022 source A new Daspletosaurus species, wilsoni, was named which appears to be an evolutionary link between two previously…

[petnews2day]

New tyrannosaur fossil discovered may be a “missing link”

New Post has been published on https://petn.ws/iYJD

New tyrannosaur fossil discovered may be a “missing link”

Though Tyrannosaurus rex is considered the “king” of the dinosaurs, the “tyrant lizard” only roamed Earth for about the last two million years of the 150-million-year “Age of Dinosaurs”. Now, researchers believe they have found a missing piece of the tyrannosaur lineage. Daspletosaurus wilsoni roamed approximately 76.5 million years ago – 10 million years before […]

See full article at https://petn.ws/iYJD #ReptileNews

[gaetaniu]

Una specie di tirannosauro appena scoperta colma una lacuna nel lignaggio che porta al Tyrannosaurus rex

Una specie di tirannosauro appena scoperta colma una lacuna nel lignaggio che porta al Tyrannosaurus rex

Quattro tirannosauri si contendono la proprietà della carcassa fresca di un Centrosaurus. Il Daspletosaurus wilsoni, un dinosauro tirannosauride vissuto 76,5 milioni di anni fa nell’attuale Montana, negli Stati Uniti, presenta una combinazione unica di caratteristiche ancestrali e derivate e rappresenta uno stadio di transizione che collega il Daspletosaurus torosus ancestrale con il…

[fossilprep]

Sacrum of the Daspletosaurus wilsoni holotype (Sisyphus)

Sacrum of the holotype of Daspletosaurus wilsoni with a significant portion still covered by concreted sandstone.

Steve Clawson and I started out sharing the duty of bulk matrix removal with heavy duty air scribes such as the ZOIC Bronto (ZPT-BR). I took over and got the matrix down close to the bone and then switched to the ZOIC T-rex (ZPT-TR) with a chisel tip for somewhat more precise prep around the centra. For even finer detail I used the ZOIC Velociraptor (ZPT-VR).

In addition to mechanical preparation, acid prep was also conducted using vinegar to scrub and dissolve matrix in hard to reach places.

Once the centra were cleaned, I rotated the sacrum and worked on the processes. The matrix was mostly sand with far less concreted material.

Sacrum with the processes and zygapophyses facing forward

I constructed a transfer prep cradle using a thin layer of ethafoam, a layer of tyvek cloth as a water barrier, and two layers of fiberglass and hydrocal dipped in plaster of Paris.

Transfer cradle (underside) with the field jacket on top

The side of the specimen that was exposed in the field was in slightly worse condition than the underside that was in the matrix. A majority of the bone on the anterior end was weathered and abraded, giving it a cracked texture and making it susceptible to destabilize when exposed to acetone. It took less time to clean than the first side because there was no concretion, only sand.

side of the specimen that was facing up in the field

It was then flipped again for the display cradle to be made. Some consolidant leaked through to the underside while it was being cleaned, so one final bit of acetone scrubbing was done to make it presentable.

The display cradle was made and the sacrum was flipped onto it. The unweathered side is facing up.

To prepare it for display, the sacrum was treated with a coat of thin paraloid and cracks and crevices were filled with grey Apoxie putty (not to be confused with epoxie) as to not blend in with the bone.

the sacrum resting in its display cradle

This was my (literal) biggest solo project to date and the largest element in Sisyphus' skeleton. It took about 300 hours from start to finish.