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K

@captain-colosteid

Paleo Mutt ⚫️⚪️🟤🤟🏿🕉 📿 💜 Master’s student at Carleton University 🇨🇦 studying 🧐 colosteids and other early tetrapods🦎 🦴 🐟 ⛏ 🪨He/They

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21.11.2024
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Latest posts by K @captain-colosteid

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New species of “living fossil” had jaws unlike anything seen before | Natural History Museum Tanyka amnicola was a relic of an earlier and more experimental time in the evolution of life on Earth.

🚨New species alert! 🚨

Meet Tanyka amnicola – a 275-million-year-old animal from Brazil with twisted jaws and sideways-facing teeth!

Find out more about this strange species 👇
www.nhm.ac.uk/discover/new...

04.03.2026 16:01 👍 52 🔁 22 💬 1 📌 0

This paper carries a special satisfaction for me. Years ago, Donglei Chen and I discovered small tooth-bearing elements in Silurian vertebrate micro-residues (obtained by dissolving rock in acid) of the stem osteichthyans Andreolepis and Lophosteus. We worked out that they must be the inner dental

04.03.2026 18:29 👍 32 🔁 10 💬 1 📌 0
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New paper! How weird could Permian animals get? Turns out, pretty weird. Meet the stem tetrapod Tanyka amnicola from the Pedra de Fogo Formation of northeast Brazil

royalsocietypublishing.org/rspb/article...

04.03.2026 15:47 👍 873 🔁 152 💬 41 📌 16
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The Voyageurs Wolf Project of Northern Minnesota tags & documents grey wolf ecology & behavior: www.voyageurswolfproject.org

The video you see here is confirmatory proof:
Wolves. Love. Blueberries.

As much as 83% of a wolf's calories in summer months comes from eating berries.

02.03.2026 13:58 👍 1642 🔁 604 💬 19 📌 79
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Early synapsids from the Cisuralian (lower Permian) Pedra de Fogo Formation, Parnaíba Basin, Brazil: the first definitive South American “pelycosaurs” The paleotropics of Euramerica provide nearly our entire picture of Permo–Carboniferous terrestrial tetrapod evolution. The geographic sampling bias inherent in this record obscures important event...

New paper with @cisneros.bsky.social and others. We report the first pelycosaur-grade synapsid fossils from South America, which happen to also be the oldest synapsids from Gondwana.

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

26.02.2026 16:32 👍 24 🔁 13 💬 2 📌 1
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Lots of bittersweet feelings tonight… tomorrow I will be in Uppsala… and the day after that I start my PhD.

22.02.2026 23:17 👍 1 🔁 0 💬 0 📌 0

Exactly

19.02.2026 22:31 👍 0 🔁 0 💬 0 📌 0
Redescription of the cockroachoid Archimylacris acadica Scudder 1868, key species of the family Archimylacridae, with description of a new specimen from the early Moscovian (Pennsylvanian) of Canad...

New paper published this past week!

14.02.2026 21:17 👍 0 🔁 0 💬 0 📌 0
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Johansson scores women's hockey Olympic tournament-leading 4th goal in Sweden's 4-0 win over France Thea Johansson scored her Olympic women’s hockey tournament-leading fourth goal and Sweden inched closer to clinching the Group B title with a 4-0 win over France at the Milan Cortina Games. Sara...

Ja!!! Skål på Sverige!!!

09.02.2026 02:41 👍 0 🔁 0 💬 0 📌 0
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Heja, Sverige!!! 🏒🇸🇪

09.02.2026 01:53 👍 0 🔁 0 💬 0 📌 0

Melanie and her freshwater mosasaur on the Dutch evening news! 🧪

15.12.2025 20:54 👍 31 🔁 4 💬 1 📌 0
A cooling rack full of golden, S-shaped buns.

A cooling rack full of golden, S-shaped buns.

Saint Lucy’s Day, 13 December, means baking ‘lussekatter’ - ‘Lucy’s Cats’ - which are soft, sweet saffron buns made into shapes the significance of which is lost in antiquity. Just out of the oven! I wish 🦋 had smell-o-vision.

13.12.2025 11:25 👍 42 🔁 5 💬 3 📌 0

Andersonville in Chicago is having a bit of a Saint Lucy’s Day celebration as well! Most likely because it’s a neighborhood with strong Swedish roots.

How common is it to make them with raisins? I have seen some before with and without raisins. personal preference?

13.12.2025 20:54 👍 1 🔁 0 💬 1 📌 0
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The olfactory bulb endocast as a proxy for mammalian olfaction | PNAS Olfaction is a critical sense for tetrapods, playing a key role in survival and reproduction by aiding in food detection, predator avoidance, and s...

www.pnas.org/doi/full/10....

12.12.2025 14:17 👍 19 🔁 7 💬 0 📌 0
Large metoposaur skull on a 3D printer stage. The skull pointing upwards at a steep angle as if taking to the skies . . .

Large metoposaur skull on a 3D printer stage. The skull pointing upwards at a steep angle as if taking to the skies . . .

Blast off!

12.12.2025 14:16 👍 20 🔁 3 💬 0 📌 0
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A new fossil fish sheds light on the rapid evolution of early lungfishes Qiao et al. report a new Early Devonian lungfish from China, Paleolophus, which bridges the morphological gap between Diabolepis and eudipnoans. Its three-dimensional preservation reveals cranial anat...

In the early Devonian #lungfishes — now considered "living fossils" — were all the rage!

A new #fish from China attests to this early diversification.
www.cell.com/current-biol...

11.12.2025 00:17 👍 29 🔁 7 💬 1 📌 1
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Yesterday I picked up a fun Swedish language (Svenska) book that has been surprisingly useful and enjoyable to read. This evening my new phone case came in the mail. The rest of this evening will involve writing, segmenting, drawing and an old fashioned.

11.12.2025 01:43 👍 0 🔁 0 💬 0 📌 0

Congratulations! WOW!

07.12.2025 22:16 👍 1 🔁 0 💬 0 📌 0
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Dynamic omnivory shapes the functional role of large carnivores under global change - Nature Communications Omnivores like bears can switch between plant and animal diets, potentially helping them respond to changing conditions. By combining modern and fossil data, this study shows that bears shift toward c...

Albrecht, J., Bocherens, H., Hobson, K.A. et al. Dynamic omnivory shapes the functional role of large carnivores under global change. Nat Commun 16, 10896 (2025). doi.org/10.1038/s414...

07.12.2025 14:13 👍 12 🔁 4 💬 0 📌 0

Love this!

06.12.2025 02:22 👍 0 🔁 0 💬 0 📌 0
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Vague update via images, but a new chapter begins next year under Prof. Per Ahlberg.

Jag är inte rädd... Jag föddes för att göra det här

05.12.2025 06:47 👍 2 🔁 0 💬 1 📌 0
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Tropical cyclothems suggest obliquity control on early glaciation of the late Paleozoic Ice Age (late Mississippian, Upper Silesia) The Late Paleozoic Ice Age (LPIA; ~355–255 Ma) represents an internally complex interval of icehouse conditions, comprising a series of discrete, Myr-…
04.12.2025 20:19 👍 0 🔁 0 💬 0 📌 0
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Re‐evaluation of a soft crested Edmontosaurin, with implications for hadrosaurid life appearance and diversity Hadrosaurid dinosaurs are generally regarded as “crested” or “non-crested” depending on the presence or absence of a bony cranial crest. At least one supposedly “non-crested” hadrosaur is known to ha...

Re‐evaluation of a soft crested Edmontosaurin, with implications for hadrosaurid life appearance and diversity - Sharpe - The Anatomical Record - Wiley Online Library anatomypubs.onlinelibrary.wiley.com/doi/10.1002/...

29.11.2025 14:19 👍 47 🔁 15 💬 1 📌 0
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Happy Thanksgiving! I'm thankful for Centuriavis lioae, a 10 million year old fossil relative of turkeys. It was a lot of fun describing this stunning specimen with Catherine Early, Kate Dzikiewicz, and Amy Balanoff. The fossil is named after our amazing museum colleague Suzanne Lio.

27.11.2025 18:21 👍 122 🔁 21 💬 1 📌 0

THE MAN BEHIND THE SCIENCE: ERIK STENSIÖ, SWEDEN’S 20th CENTURY DOYEN OF THE STOCKHOLM SCHOOL

27.11.2025 14:35 👍 0 🔁 0 💬 0 📌 0
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Appendicular morphology of Mesenosaurus efremovi and the earliest occurrence of a calcaneal tuberosity The Richards Spur locality in Oklahoma, U.S.A. is renowned for its diverse assemblage of early Permian terrestrial tetrapods, including the varanopid Mesenosaurus efremovi. Recent quarrying operati...

Appendicular morphology of Mesenosaurus efremovi and the earliest occurrence of a calcaneal tuberosity

21.11.2025 12:50 👍 0 🔁 0 💬 0 📌 0

Functional anatomy, jaw mechanisms, and feeding behavior of Dunkleosteus terrelli (Placodermi, Arthrodira) - Engelman - The Anatomical Record - Wiley Online Library anatomypubs.onlinelibrary.wiley.com/doi/10.1002/...

20.11.2025 13:49 👍 0 🔁 0 💬 0 📌 0
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ppgm: an R package for integrating neontological, palaeontological, and climate data in a phylogenetic comparative framework Understanding how changes in climate affect habitat availability for species through time is critical for macroevolutionary, ecological, and conservation research. When combined with palaeoclimate re...

onlinelibrary.wiley.com/doi/10.1111/...

15.11.2025 20:30 👍 0 🔁 0 💬 0 📌 0
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Incorporating continuous characters in joint estimation of dicynodont phylogeny Abstract. Continuous characters have received comparatively little attention in Bayesian phylogenetic estimation. This is predominantly because they cannot

Check out this new paper in Systematic Biology! Aside from the author list including leaders in the field who happen to be some of my favorite scientists, this paper discusses * both * phylogeny inference incorporating continuous characters AND dicynodont evolution. How cool is that? 🧪

14.11.2025 17:29 👍 15 🔁 7 💬 1 📌 1
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NEW pub in @science.org 🥳

Is it sponges (panels A & B) or comb jellies (C & D) that root the animal tree of life?

For over 15 years, #phylogenomic studies have been divided.

We provide new evidence suggesting that...

🔗: www.science.org/doi/10.1126/...

13.11.2025 20:33 👍 284 🔁 130 💬 14 📌 30