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Jack Stack

@jackstack

Trophy husband, PhD vertebrate paleontologist. Lecturer of Zoology at Bowie State University. I also write about the history of fishes: https://fishhistory.substack.com/. He/him

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24.07.2023
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Latest posts by Jack Stack @jackstack

Not in academia but Cam James on YouTube does extremely thorough and well-researched videos on scams and grifting at all levels in the US.

06.03.2026 20:51 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Tiny branching fossil on a brachiopod

Tiny branching fossil on a brachiopod

This kind of thing

06.03.2026 20:50 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Encrusting animals from a bunch of Devonian brachiopods from Michigan, have a student working on them now.

06.03.2026 18:32 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

My brachiopod project is now largely a bryozoan and coral project. Exciting times!

06.03.2026 18:00 πŸ‘ 11 πŸ” 0 πŸ’¬ 2 πŸ“Œ 0

@reallyoldfish.bsky.social

06.03.2026 17:45 πŸ‘ 2 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

Excellent can’t wait to read!

06.03.2026 01:03 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Looking at articles on Zookeys and Zootaxa is far too much fun. I can’t get enough of all the awesome taxonomy that’s being done around the world. So much amazing work!

05.03.2026 03:49 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Cover of the journal Nature, featuring the head of a large fish with its mouth open.  A smaller fish is swimming into its mouth. The cover reads "Caught in Time: Early fossils shed light on the origins of bony fish."

Cover of the journal Nature, featuring the head of a large fish with its mouth open. A smaller fish is swimming into its mouth. The cover reads "Caught in Time: Early fossils shed light on the origins of bony fish."

Osteichthyans--the bony fishes--are by far the most diverse group of living jawed vertebrates. Two papers out today in @nature.com feature remarkable new Chinese fossils that paint a picture of substantial morphological diversity among stem osteichthyans.

04.03.2026 22:17 πŸ‘ 91 πŸ” 32 πŸ’¬ 1 πŸ“Œ 1
My notebook

My notebook

This is my artificial intelligence writing assistant, it provides work-flow enhancement and doubles as a fly swatter. I write much more efficiently with it! I’d like a 50 billion dollar evaluation please.

04.03.2026 18:59 πŸ‘ 4 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

This is correct

04.03.2026 16:55 πŸ‘ 4 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

He's perfect to me (from Moy-Thomas and Bradley Dyne (1938).

04.03.2026 16:55 πŸ‘ 6 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Most normal Permian animal

04.03.2026 15:54 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Paper looks very interesting but this is the most terrifying figure I have ever seen.

04.03.2026 15:53 πŸ‘ 5 πŸ” 0 πŸ’¬ 2 πŸ“Œ 1

🐊 Fish (Lent)

04.03.2026 14:48 πŸ‘ 4 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
Blank white wall

Blank white wall

Wilson Fisk looking at a wall

Wilson Fisk looking at a wall

Enjoying the decor in my office

04.03.2026 00:58 πŸ‘ 2 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Going to print this out and put it above my desk

03.03.2026 17:08 πŸ‘ 14 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

This is what the geneticists in my department see when they read my papers.

03.03.2026 04:29 πŸ‘ 7 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Now the aim is to get grants to fund the basic equipment needed to catalog specimens. Hopefully I can get that done, otherwise I’ll be funding it out of pocket.

03.03.2026 04:21 πŸ‘ 3 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

The road is tough. Doing fossil taxonomy has required a lot of luck and frankly having my parent’s support when grants didn’t come through. If we want more taxonomy and taxonomists, we need to fund it. It’s an absolutely essential 21st century science, but it’s not funded like it.

03.03.2026 04:21 πŸ‘ 6 πŸ” 1 πŸ’¬ 1 πŸ“Œ 0

Couldn’t agree more. Just today had a student start learning about Devonian brachiopods and the tiny animals that grew on them (corals, bryozoans, and worm-like things that haven’t been identified at the phylum level). They are excited to learn!

03.03.2026 04:21 πŸ‘ 12 πŸ” 2 πŸ’¬ 1 πŸ“Œ 0
Post image

Don’t forget him

03.03.2026 00:47 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Bead boxes and pusheen stickers

Bead boxes and pusheen stickers

I’m ready to store some fossils! Brachiopods for now, hoping to get in the field soon and collect more fishes (and brachiopods too of course). And some office decorations @pusheen.bsky.social

01.03.2026 23:55 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Tire rim that’s destroyed

Tire rim that’s destroyed

Thank you to the city of Laurel for having a giant pothole in the middle of the road!

01.03.2026 20:35 πŸ‘ 5 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Love figtree excited to try this new tool

01.03.2026 17:29 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

This site also has a palaeoniscoid somehow. They really did live forever

28.02.2026 23:48 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Fossil coral have always been a favorite of mine. The Devonian was a time of strange and wonderful corals of all shapes and sizes. In Michigan, I’ve found horn corals and colonies as big as basketballs. There are also tiny encrusting corals the size of a grain of rice. Awesome fossil!

28.02.2026 00:24 πŸ‘ 4 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

What kind of lemon is this?

27.02.2026 03:39 πŸ‘ 2 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Looks perfect to me

26.02.2026 19:19 πŸ‘ 3 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Government enforcement of an individual's gene-to-phenotype mapping on the basis of normative and essentialist arguments is eugenics. If you don't see how dangerous that is you know nothing about biology.

26.02.2026 16:28 πŸ‘ 27 πŸ” 8 πŸ’¬ 1 πŸ“Œ 1

Ill have to take some photos and get your opinion, I have a bunch of brachiopods from the same site in Michigan (Devonian) that have a variety of encrusters and even some bore holes.

26.02.2026 15:32 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0