K.Kubo

Cropping teeth of Utah's new Kayenta ornithischian, so for #FossilFriday Scutellosaurus lawleri. My pics of the original exhibit & gastondesign.com mount. Not the transition at base of tail from 2 rows of osteoderms across midline to 1 medial row running down the tail. @utahpaleo-ufop.bsky.social

Photo of Dr. Hans-Dieter Sues and Tim Fedak, photograph of Teraterpeton skull, skull of Hypsognathus, and Clevosaurus, all from Nova Scotia.

I was deeply saddened to hear of the recent passing of Dr. Hans-Dieter Sues. He has generously supported my work over the past thirty years and he made huge contributions to paleontology here in #NovaScotia. From 2021, a @novascotiamuseum.bsky.social showcase video youtu.be/AjzIuaQ-Qn0 - RIP Hans.

Skeleton in right lateral view of the early Late Jurassic metriacanthosaurid dinosaur Sinraptor dongi

#FossilFriday The metriacanthosaurid Sinraptor dongi

The tale of Alnashetri cerropoliciensis and body size evolution in alvarezsaurids Alvarezsauridae represents a distinctive lineage of small-bodied theropod dinosaurs, mainly known from the Jurassic to Cretaceous period of Asia and South America. Initially interpreted as flightle…

The tale of Alnashetri cerropoliciensis and body size evolution in alvarezsaurids paleonerdish.wordpress.com/2026/02/26/t...

#FossilFriday
Mongolian alvarezsaurid, Jaculinykus showing a resting posture, which is probably similar to that of an novel specimen of Alnasherti, published in this week!

"Histological analyses indicate that the specimen was at least 4 yrs old when it died, with a slowed growth rate suggesting that it was nearly adult. Additionally, the presence of medullary bone around the medullary cavity...suggests that the new Alnashetri specimen was female." @ferwen.bsky.social

Skeletal morphology of an early ichthyopterygian, cf. Utatsusaurus hataii, from Japan with an emphasis on CT scan data of the skull The Early Triassic Utatsusaurus hataii is one of the earliest ichthyopterygians and shows numerous plesiomorphic features. An ichthyopterygian specimen, NSM-PV-20028, from the Osawa Formation in Mi...

Skeletal morphology of an early ichthyopterygian, cf. Utatsusaurus hataii, from Japan with an emphasis on CT scan data of the skull: Journal of Vertebrate Paleontology: Vol 0, No 0 - Get Access www.tandfonline.com/doi/full/10....

Argentine fossil rewrites evolutionary history of a baffling dinosaur clade - Nature A skeleton of the alvarezsauroid Alnashetri cerropoliciensis—representing a highly complete alvarezsauroid skeleton from South America—provides evidence on the evolution of the peculiar anatomy and mi...

Makovicky, P.J., Mitchell, J.S., Meso, J.G. et al. Argentine fossil rewrites evolutionary history of a baffling dinosaur clade. Nature (2026). doi.org/10.1038/s415...

Argentine fossil rewrites evolutionary history of a baffling dinosaur clade - Nature A skeleton of the alvarezsauroid Alnashetri cerropoliciensis—representing a highly complete alvarezsauroid skeleton from South America—provides evidence on the evolution of the peculiar anatomy and mi...

New specimen of Alnatshetri is out!
What a beautiful specimen and surprising results!!

www.nature.com/articles/s41...

Electric drawing pen。補助的に使うぶんにはいいかも。（麒麟魚で練習。）

New #DAWNDINOS paper!
We do predictive simulations of vertical height jumping in the Triassic theropod Coelophysis & extant (tinamou) bird Eudromia. Mainly as sensitivity analysis of what parameters are most important. We show how crucial tail mobility is.
royalsocietypublishing.org/rsif/article...

Blue NoteTOKYO
また行きたい。音がいい

Thrilled to share that our new #OA paper is out in @anatrecord.bsky.social! You like horned dinosaurs including famous Triceratops? we provide the the first comprehensive hypothesis on their soft‐tissue anatomy, based on detailed comparisons with living reptiles! doi.org/10.1002/ar.7...

New #GRAVIBONE paper by @jordangonet.bsky.social on ornithopod posture and locomotion. Congrats Jordan :)

From https://doi.org/10.1002/ar.70150. FIGURE 10 Life reconstruction of the head of Triceratops prorsus with nasal soft tissues inferred in the present study shown. Soft tissues include the main narial nerves and blood vessels, nasal gland, nasolacrimal duct, and respiratory turbinate. Note that the nasolacrimal duct and respiratory turbinate were inferred mainly in centrosaurines. Artwork by K. Sakane. n & bv, nerves and blood vessels; ng, nasal gland; nld, nasolacrimal duct; rt, respiratory turbinate.

Excited to see this article led by @seishirotada.bsky.social out in @anatrecord.bsky.social. Triceratops and their ceratopsian kin are more than horns and frills! Check out their narial regions! doi.org/10.1002/ar.7...

Nothing in Biology Makes Sense Except in the Light of Ontogeny—Organism as Ontogeny, a New Paradigm for Science - Paleontological Journal Abstract Despite accumulated ontogenetic data, ontogeny is not considered as a basis for evolutionary process in the current paradigm. Biogenetic law undeservedly lost its significance in biology beca...

Martynov & Korshunova (2026-02, Paleontological Journal)
「生物学は，個体発生に照らして考えなければ何も意味をなさない——個体発生としての生物：科学のための新たなパラダイム」
Nothing in Biology Makes Sense Except in the Light of Ontogeny—Organism as Ontogeny, a New Paradigm for Science
doi.org/10.1134/S003...

Diagram showing the evolution of jaw joint structure across archosaurian reptiles, especially coelurosaurian theropods (including birds).

Evolution of the avian jaw joint and middle ear: bioone.org/journals/zoo... 🪶🧪 (📷Watanabe et al.)

Functional Morphology of the Archosaur Neck Provides Evolutionary Insights Into the Avian Neck Flexibility Dorsoventral neck movements are produced primarily by some selected cervical joints, while others maintain their intrinsic angles. Using a new functional proxy, we show that two joints near the skull...

Congrats, Utsuki!
Utsuki, Yohei, and Yoshitsugu Kobayashi. 2026. “Functional Morphology of the Archosaur Neck Provides Evolutionary Insights Into the Avian Neck Flexibility.” Journal of Morphology 287 (2): e70114.
onlinelibrary.wiley.com/doi/10.1002/...

Simulated airflow around a 3D model of the bird-like dinosaur Microraptor.

Gliding aerodynamics of Microraptor: www.pnas.org/doi/10.1073/... 🪶🧪 (📷Hefler et al.)

🦖 Big news about a ‘little’ tyrant: new research finds that Nanotyrannus wasn’t a baby T. rex after all!

Through examining the throat bone of the Nanotyrannus, researchers found that while smaller, the species was a fully grown and distinct predator during its time.

Skull of Scyllacerta, reconstructed based on scans of four nearly complete skulls.

Introducing a new Permian reptile: Scyllacerta creanae

With a tympanic fossa on the quadrate and no lower temporal bar, Scyllacerta challenges long-standing ideas about when-and-how hearing evolved in reptiles 🦎👂

🔗 doi.org/10.1111/pala...

Levine (2026-01, Nature)
「目を見張る発見：初期の脊椎動物は2つではなく4つの眼をもっていた」
An eye-popping discovery: early vertebrates had four eyes rather than two
doi.org/10.1038/d415...

引用元の論文に対するNews & Viewsです！

www.hokudai.ac.jp/news/2026/01...

🧬Euro Evo Devo 2026🦖
University of Glasgow, 9–12 June 2026.

Registration is now open!
Deadline: Thursday, 5 March 2026
registrations.hg3conferences.co.uk/hg3/frontend...

We are organising Symposium S08: “Integrative Perspectives on Craniofacial Evo-Devo”.
We welcome contributed talk submissions!

後輩たちの論文がでました！　おめでとうございます、すごい時代がきている！

An exciting paper out! A team of paleontologists and AI discovered hidden fossils 🦑 in carbonate rocks!! Congratulations 🎉

www.nature.com/articles/s42...

暗黒面が見える

結果的にはそうみえますね　そういうつもりではなくても

流石に蒙古まで侵攻するとは、思ってませんでした笑

洪水が化石の形成に与える影響
これまでの研究は定常流の条件で化石の流され方、埋もれ方を研究していたが、現実世界の洪水や、波紋、砂丘、砂州といった河川の特徴を模擬した高波を再現した実験でわかったことが
論文OA www.cambridge.org/core/journal...
ニュース twin-cities.umn.edu/news-events/...

A hidden diversity of ceratopsian dinosaurs in Late Cretaceous Europe - Nature New results indicate that rhabdodontids and the previously described Ajkaceratops are actually distinctive European ceratopsians, a group better known from Asia and North America.

Out in @nature.com today, we shake up the ornithischian family tree. Remember those weird Late Cretaceous iguanodontians, the rhabdodontids? Well they're weird because they aren't iguanodontians. They're ceratopsians. Well, at least some of them are... www.nature.com/articles/s41...