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Shawn Zack

@galecyon

Paleontologist and anatomist in Phoenix, Arizona

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26.01.2025
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Latest posts by Shawn Zack @galecyon

There was a scrum in front of the Slovak net a few minutes ago and I thought the Slovaks were fighting each other for a good 15 seconds

20.02.2026 20:25 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Anyone: Its cold
Me: Yes. Cold and hard.

04.02.2026 02:20 πŸ‘ 1 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

I live right down the street from Schreiner's and I constantly make the "its a real sausage factory joke" to my wife. She rolls her eyes.

31.12.2025 03:59 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Another Night by the Real McCoy.  Another popular Eurodance album from the 90s.

Another Night by the Real McCoy. Another popular Eurodance album from the 90s.

28.12.2025 04:18 πŸ‘ 6 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

The random weapons firing orange flames in random directions is giving big GI Joe box art vibes (probably just about as practical too)

23.12.2025 01:03 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Also, the suture labels don't point to sutures

19.12.2025 16:53 πŸ‘ 4 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

The "inferior" view is a weird mixture of things that would actually be seen in an inferior view (e.g., occipital condyles) and things that would be seen in a superior view of the base of the skull (e.g., sigmoid sinus, internal acoustic meatus)

19.12.2025 16:53 πŸ‘ 4 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Came here to say this. I think this article may have an AI hallucination reporting what should happen as having already happened.

11.12.2025 13:41 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Video thumbnail
07.12.2025 23:57 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

I use "like an orange on a toothpick" waaay too often

17.11.2025 03:04 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

A Passage to Indiana

08.09.2025 05:38 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Electrolite

02.09.2025 00:05 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

And if they lasted long enough, stalagmites "might" reach the ceiling

22.08.2025 22:44 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

(13/13) I think that does it. This has been a long term labor of love, but I'm happy to see it finally published. On behalf of my collaborators, thanks for listening and thanks to everyone who helped along the way.

25.06.2025 22:05 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

(12/x) and hyaenodonts (carnivorous mammals distantly related to living dogs and cats). The new material strongly supports the third option. Wyolestes is a hyaenodont. It expands the diversity of hyaenodonts and it seems to be one of the few not adapted to eating vertebrates.

25.06.2025 22:04 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

(11/x) As for what Wyolestes is related to, previous studies had suggested a variety of different relationships. Possible relatives included mesonychians (generally large-bodied predators and scavengers related to living hoofed mammals), didymoconids (weird burrowing mammals from Asia),...

25.06.2025 22:01 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

(10/x) That fits the skeleton which overall indicates generalized habits, but does show some evidence of digging adaptations in the forelimbs. Wyolestes probably used it forelimbs, including long fissured claws, to dig for worms or tear open insect nests.

25.06.2025 21:58 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

(9/x) The most similar living mammals include several species that specialize in eating invertebrates like earthworms, including the falanouc and Owston's palm civet. We suspect that Wyolestes was specialized for eating some combination of large invertebrates and social insects like ants.

25.06.2025 21:56 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

(8/x) There's no evidence for a proboscis. In fact, the foramen that transmits nerves and vessels to the snout is very small, more like a dog than anything with a mobile snout.

25.06.2025 21:53 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

(7/x) Done with a summer outreach session, so let me pick this up. Wyolestes has teeth that look like a lot of carnivorous mammals, but without the big shearing blades that most carnivores have. It also has a very narrow, elongate skull, exaggerated a little bit by crushing, but not too much.

25.06.2025 21:51 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

(6/x) The new monograph describes and illustrates all of that new material to answer basic questions of what was Wyolestes related to and how did it live. Unfortunately, I timed this badly, so the answers to those questions will have to wait an hour or two...

25.06.2025 19:51 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

(5/x) As the study progressed, we ended up identifying additional specimens. Pat Holroyd from the UCMP pointed us to a different Smithsonian specimen including a nearly complete ankle. We stumbled across a specimen at Yale including more postcrania and well-preserved ears.

25.06.2025 19:49 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

(4/x) Many years of preparation, description, and illustration followed. Along the way, we began a collaboration with Maureen O'Leary at StonyBrook to include unpublished postcranial material of Wyolestes from Baja California.

25.06.2025 19:47 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

(3/x) Ken Rose, my advisor and now coauthor, convinced Red to donate the skull to the Smithsonian and take us to the spot he had found it. We ended up collecting a partial skeleton, greatly improving what was known of Wyolestes.

25.06.2025 19:46 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
Post image

This project started way back in 2002 when I was a second year graduate student. A local collector, Vincent "Red" McHoes, brought a spectacular specimen to the annual 4th of July party in Powell, Wyoming

25.06.2025 19:43 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Happy to announce publication of a very long term project, a revision of the weird early Eocene mammal 𝘞𝘺𝘰𝘭𝘦𝘴𝘡𝘦𝘴 with Maureen O'Leary and Ken Rose (1/x)

bioone.org/journals/bul...

25.06.2025 19:36 πŸ‘ 3 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0