There's a new dinosaur (model) at the Museum! Meet Microraptor gui. Since 2005, Museum Preparator Jason Brougham worked with Mark Norell, inaugural Macaulay Curator in the Museum’s Division of Paleontology, on modeling this amazing animal.

2番目以降の漂う妖気よ

ネッシーの方、まだお会いしたことないです。大学OBかつ倶楽部の大先輩

左右の首振り運動 (yaw) 安定については、胴体が曲者で、垂直尾翼のように見える背ビレは重心位置に近すぎて（モーメントアームが短すぎて）安定化には足りないことがひとつの take-home message.

一方、体軸まわりの横転 (roll) については、背ビレと胸ビレが拮抗的に働くという面白いことが起きていて、胸ビレの下半角や畳むかどうかという形態・行動とも絡んでくるところが面白いポイント。

The reproducibility crisis in phylogenetic analyses Published in Journal of Vertebrate Paleontology (Ahead of Print, 2026)

Godoy et al. (2026-04, Journal of Vertebrate Paleontology)（オープンアクセス open access）
「系統解析における再現性の危機」
The reproducibility crisis in phylogenetic analyses
doi.org/10.1080/0272...

準備概ね完了

Dakota’s tail in panoramic

Back of Dakota’s paw

Another shot of the back of the paw

Full paw

Up close and personal w Dakota, enjoy these photo textures for your digital art brushes you nerds <3 #northdakota #ammp #dinosaurs #paleoart

The axial skeleton of the tuatara (Rhynchocephalia: Sphenodon): insights on intraspecific variability, ontogeny, sexual dimorphism, and remarks on fossil taxa Abstract. As the sole living rhynchocephalian, the tuatara (Sphenodon punctatus) provides important comparative information for fossil rhynchocephalians an

As the sole living genera of an ancient order of reptiles, tuataras are key for fossil comparisons of extinct species & modern lepidosaurs (lizards & snakes). Here, their axial skeleton is described in detail, offering new insights to this unique creature...Tuatar-ya interested? 🌍🧪👇

Durophagous Palatobaena, found to both sides of the extinction horizon, sitting on an extinct Basilemys with the mandatory T. rex skull in the background. Art by Joschua Knüppe

New paper: royalsocietypublishing.org/rsbl/article...

Guilherme & I investigate dietary selectivity on turtle K/Pg extinction - durophagous turtles have higher survivorship probability. Beautiful art by @joschuaknuppe.bsky.social

New research reveals first comprehensive hypothesis of soft-tissue anatomy in ceratopsid dinosaurs. Reconstruction of Triceratops’ nasal nerves, glands & respiratory turbinates suggests unique innervation and head-cooling adaptations.
Tada et al.: anatomypubs.onlinelibrary.wiley.com/doi/10.1002/...

Alexey V. Lopatin & Alexander O. Averianov (2026)
Multituberculate mammals from the Upper Cretaceous Nemegt Formation of Mongolia
Cretaceous Research 106407
doi: doi.org/10.1016/j.cr...
www.sciencedirect.com/science/arti...

Holy shit! What a wonderful specimen⁉️

Lystrosaurus embryo!

Benoit J, Fernandez V, Botha J (2026) The first non-mammalian synapsid embryo from the Triassic of South Africa. PLoS One 21(4): e0345016. doi.org/10.1371/jour...

The first non-mammalian synapsid embryo from the Triassic of South Africa Oviparity was likely the plesiomorphic reproductive condition for non-mammalian Synapsida, the stem-mammal group. Yet, despite nearly two centuries of research, no definitive fossil eggs of late Palaeozoic or early Mesozoic synapsids have been discovered. Here, three perinate specimens of the dicynodont genus Lystrosaurus from the Early Triassic of the South African Karoo Basin are examined using high-resolution CT and synchrotron scanning. One specimen, NMQR 3636, displays a tightly curled posture suggestive of an in ovo position and completely lacks tusks. Crucially, the lower jaw symphysis remains unfused—a developmental trait found only in pre-hatching embryos of modern birds and turtles. No calcified eggshell is preserved, so the egg might have been soft and leathery. The large size of the reconstructed egg suggests a precocial, non-milk-feeding developmental strategy. As a non-cynodont synapsid, Lystrosaurus offers a rare and valuable glimpse into reproductive biology far removed from the mammalian crown group. Unlike the more derived, mammal-like cynodont Kayentatherium, whose egg size aligns with lactation, Lystrosaurus anchors the plesiomorphic condition deep within Synapsida. Its reproductive strategy may have played a crucial role in its resilience and ecological dominance following the end-Permian mass extinction.

DICYNODONTS ARE CONFIRMED TO HAVE LAID EGGS HOLY SHIT
journals.plos.org/plosone/arti...

LOOK AT THE BABY LYSTROSAURUS

New paper out by Izidio et al., involving @marihaase:

Crocodylomorph dietary versatility has implications for metabolic capacity ... if we could just extract metabolic signals from teeth 🐊

Link: www.tandfonline.com/doi/full/10....

J. Yoshida, K. Carpenter & Y. Kobayashi (2026)
First record of somphospondylan sauropods from the Cedar Mountain Formation (Lower Cretaceous) of Utah, USA, and spatiotemporal implications for the Cretaceous sauropods in North America
Cretaceous Research 106395

www.sciencedirect.com/science/arti...

First record of somphospondylan sauropods from the Cedar Mountain Formation (Lower Cretaceous) of Utah, USA, and spatiotemporal implications for the Cretaceous sauropods in North America Early Cretaceous dinosaur records from North America have been increased, but the records of sauropod dinosaurs remain discontinuous spatiotemporally.…

First record of somphospondylan sauropods from the Cedar Mountain Formation (Lower Cretaceous) of Utah, USA, and spatiotemporal implications for the Cretaceous sauropods in North America

www.sciencedirect.com/science/arti...

Mummified early Permian reptile reveals ancient amniote breathing apparatus Nature - A mummified fossil of the early Permian reptile Captorhinus reveals the potential ancestral amniote breathing mechanism and its impact on terrestrial vertebrate evolution.

Mummified early Permian reptile reveals ancient amniote breathing apparatus
www.nature.com/articles/s41...

Mummified early Permian reptile reveals ancient amniote breathing apparatus - Nature A mummified&nbsp;fossil of the early Permian reptile Captorhinus reveals the potential ancestral amniote breathing mechanism and its impact on terrestrial vertebrate evolution.

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

This Tiny Fish Was Our Ancestral Powerhouse YouTube video by Canadian Museum of Nature

youtu.be/tF-nOp9zaLE

#fossilfriday
Troodontid embryo’s pelvis

動画あります
“鳥の首の動き 恐竜の段階から柔軟か” 北大の研究グループ news.web.nhk/newsweb/na/n...

PASEDB community 🤩

We are excited to announce our first Research Webinar series called:

⭐️EvoDevo Mondays⭐️

Save the date - April 13

With our amazing speakers @luiza-o-saad.bsky.social and João Francisco Botelho

Session chair Professor Natalia Pabón-Mora

#PASEDB #EvoDevoMondays #EvoDevo

PASEDB EvoDevoMondays Registration Please use this form to register for the PASEDB EvoDevoMondays Early Career Research Webinar. Once you are registered, we will send you the Zoom link a few days ahead of the webinar. The next EvoDevo...

Remember that #EvoDevoMondays webinar will be held online April 13, 2026 (7am HST - 9am AKDT - 10am PDT - 1pm EDT - 2pm BRT)
🐥🐓🐦🦆
Register here: docs.google.com/forms/d/e/1F...

#EvoDevoMondays - ⭐️Meet our speaker⭐️

João Francisco Botelho

Assistant Professor
Pontificia Universidad Católica de Chile

João's talk:
The developmental evolution of avian legs

“if the whole hind quarter… of a half-hatched chicken could be suddenly enlarged, ossified, and fossilized as they are, they would furnish us with the last step of the transition between Birds and Reptiles; for there would be nothing… to prevent us reffering them to the dinosauria.”
Th. Huxley 1869

Top right: Sketch of a salamander illustrating the defined movements of the proximal (hip) and distal (elbow) limb joints measured in this study. Middle left: A muscle map for the giant salamander Dicamptodon, used as model comparator for the stem tetrapods. Lower row: left (blue rectangle) cover image for the journal Palaeontology; middle, musculoskeletal model in a mid-stance pose; right, plot of muscle moment arms.

Musculoskeletal function of stem tetrapod limbs onlinelibrary.wiley.com/doi/10.1111/... @crocodilejulia.bsky.social @johnrhutchinson.bsky.social @royalvetcollege.bsky.social

Dynamic tracking of breastfeeding and weaning in carbon isotopes of tooth enamel Stable carbon isotopes are fundamental for dietary and life-history reconstructions across living and fossil mammals. However, commonly used enamel-di…

Congrats Dr.Kimura

What a beautiful and impressive results!

www.sciencedirect.com/science/arti...

3D models of the inner ear of Eunotosaurus

Eunotosaurus specimen from the BPI collections at Wits in Johannesburg

New paper: we describe the inner ear anatomy of Eunotosaurus africanus, based on a specimen that has not been published previously. Open access @journalsystpal.bsky.social:

www.tandfonline.com/doi/full/10....