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J Pardo

@jdpardo.bsky.social
1.5K followers 362 following 1.5K posts

Research Council of Lithuania Fellow at Vilnius University. Tetrapods in deep time: evolution, development, and paleontology.

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J Pardo @jdpardo.bsky.social · 2h
Worth it though!
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J Pardo @jdpardo.bsky.social · 18h
Nome of this looks like someone with control over messaging either. This is very haphazard. She'll be resigning by the end of the month.
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J Pardo @jdpardo.bsky.social · 21h
this post in a nutshell:
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The Palaeontological Association @thepalass.bsky.social · 09/10/2026
Reconstruction of the canopy of the iconic Lepidodendron aculeatum, based on new articulated fossils from the Bashkirian (Pennsylvanian) of Hagen-Vorhalle, Germany onlinelibrary.wiley.com/doi/10.1002/... #PapersinPalaeontology #FossilFriday
Upper left: Photograph of an articulated branch system of Lepidodentron aculeatum from the Bashkirian (Pennsylvanian, upper Carboniferous) of Hagen-Vorhalle, Germany (WMNM P85752). The specimen is approximately 350 cm long and about 200 cm wide (scale bar on the right is 100 cm).
Lower left: Enlargement of part of the branch system: second ramification of the right main branch. Scale bar in lower right corner of photograph is 1 cm.
On the right: an artist's reconstruction of one interpretation of Lepidodentron aculeatum (illustration copyright Stefan Sølberg; Mørkøv, Denmark, 2026).
Red rectangle at bottom centre is a cover image from the journal Papers in Palaeontology.
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J Pardo @jdpardo.bsky.social · 23h
Putting in my bid for the 2027 Nobel Peace Prize by taking a sledgehammer to every museum drawer labeled "Elonichthys"
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J Pardo @jdpardo.bsky.social · 09/10/2026
Unappreciated human rights issue
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J Pardo @jdpardo.bsky.social · 09/10/2026
I suppose it's #fossilfriday so here's the skull of the Permian coelacanth Spermatodus from Texas, courtesy of the AMNH.
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J Pardo @jdpardo.bsky.social · 09/10/2026
It's not thaaaaaat bad
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Prosanta Chakrabarty @prosanta.bsky.social · 09/10/2026
Natural history museums are at an inflection point that started with the auctioning of dinosaurs. If Fort Hays State (Sternberg) or Drexel (Acad.Nat.Sci.) think they can monetize collections (i.e., sell natural history specimens); museums become safety deposit boxes instead of research institutes.
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Prof. Juan Cisneros ⚒️🐉 @cisneros.bsky.social · 09/10/2026
Esta é Timonya, um anfíbio que viveu antes dos dinossauros em Timon, MA. O crânio mede 4cm, seus braços e pernas eram diminutos (consegue ver os ossinhos dos dedos no lado esquerdo?) e ela deveria passar a maior parte do tempo dentro d'água. #fossilfriday
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J Pardo @jdpardo.bsky.social · 09/10/2026
I'm definitely observing this. A lot of my friendships from university began as study groups. Now students just study with notebookLM or another chatbot. These students will come out of university more socially isolated, less open-minded, and lacking critical communication and collaboration skills.
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J Pardo @jdpardo.bsky.social · 09/10/2026
That's no way to talk about Tegeolepis
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Charles C Roseman @evoroseman.bsky.social · 09/10/2026
Joseph Mengele had a doctoral degree in anthropology. Probably the most famous anthropologist PhD of all time (Jane Goodall had an ethology PhD).
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J Pardo @jdpardo.bsky.social · 09/10/2026
Obvious in retrospect.
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J Pardo @jdpardo.bsky.social · 09/10/2026
Cheirolepis canadensis 🇨🇦, Wendyichthys, and who else?
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Ben Miller @extinctmonsters.bsky.social · 09/10/2026
Hays Daily News is absolutely killing it with their investigation into the Sternberg closing. Great work by a local newspaper.
hdnews.net
BREAKING NEWS - Sternberg Building is ‘Fine’; Deferred Maintenance Common at State-Owned Facilities - Hays Daily News
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Dodo and Dinosaur @dododinosauruk.bsky.social · 08/10/2026
Our latest #ExtraordinaryExtinct illustrations are taking shape in the studio and we’re going back to some of the OGs of prehistoric pop culture- here’s Dimetrodon! Which creature should we bring to life next? 👇 #Dimetrodon #Palaeontology #PrehistoricLife #Fossils #NaturalHistory #DinosaurLovers
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Annie Abrams @annieabrams.bsky.social · 08/10/2026
i think this is right and these people aren‘t hoarding liberal education for their own children they actually just hate it or think it’s useless
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Fabio A. Machado @fmachado.bsky.social · 07/10/2026
Fresh out of the oven: a little provocation about the conclusion that macroevolution rates are slower than we would expect. Feedback and rebuttals are welcome academic.oup.com/evlett/advan... with @damelo.net @apenna.bsky.social @agporto.bsky.social and others
academic.oup.com
Invasion of new adaptive zones retains telltale signs of directional selection at macroevolutionary scales in mammals
Abstract. Directional selection is often viewed as a transient force in macroevolution, with its signal eroded over time by stabilizing and fluctuating sel
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Andrej Spiridonov @andrejpaleo.bsky.social · 08/10/2026
Sediments, geochemistry, taphonomy as well as evolutionary patterns usually point to the same transformative events if you know how to read: "The Choteč Limestone-Kačák Member succession represents ... favorable...preservation of microbial microfabrics." link.springer.com/article/10.1... 🧪⚒️ #Geology
Geological and stratigraphic setting of the studied Hlubočepy railroad cut section
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J Pardo @jdpardo.bsky.social · 08/10/2026
"Is the goal to sell things? No, the goal is to grow the endowment by selling things. Keep up."
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J Pardo @jdpardo.bsky.social · 07/10/2026
No worries. This is a rapidly evolving situation.
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J Pardo @jdpardo.bsky.social · 07/10/2026
Very clear now that FHSU administration was consulting with antiquities dealers to sell the collection. That is not on the state of Kansas. That is entirely on FHSU.
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J Pardo @jdpardo.bsky.social · 07/10/2026
This is not an expert in navigating the complex process of relocating significant research collections to a new institution. This is someone whose job it is to find wealthy private buyers looking for trophies. Mason and others need to resign now.
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J Pardo @jdpardo.bsky.social · 07/10/2026
100%. Providing students with the skills to be a good citizen isn't necessary if you don't care about civic engagement. Which is also why we're seeing such a push to convince people to let AI models do their thinking for them and why tch billionaires keep talking about people being "NPCs"
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Kiersten Formoso, PhD(epressed) @formorphology.bsky.social · 07/10/2026
Got some exciting new mosasaur research out today in Current Biology! How fast could these predators burst? www.cell.com/current-biol...
cell.com
Mosasaur tail morphology reveals burst swimming performance and ecological diversity
Formoso et al. develop a drag-based “slam-start” model to estimate lunge velocity in four mosasaurs from skeletal and muscle reconstructions. Tail curl amplitude mainly drives performance: russellosau...
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J Pardo @jdpardo.bsky.social · 07/10/2026
Post gifs that might help convince Reviewer 2
static.klipy.com
Bugs Bunny and Daffy Duck: Duck Season
ALT: Bugs Bunny and Daffy Duck: Duck Season
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J Pardo @jdpardo.bsky.social · 07/10/2026
Thanks. I've been thinking about this a lot this past week.
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J Pardo @jdpardo.bsky.social · 07/10/2026
Same applies to museums. The people who built these institutions believed these institutions make us better people. That by standing in front of the Blue Whale in the American Museum of Natural History, we might be inspired to be our best selves. Take this away and you are saying that is worthless.
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J Pardo @jdpardo.bsky.social · 07/10/2026
If you shut down a library that might be my only opportunity to read Shakespeare, then this is effectively the same thing as saying that you do not value the person I might become by reading Shakespeare. You are saying that you do not care if I can navigate conversations that reference Shakespeare.
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J Pardo @jdpardo.bsky.social · 07/10/2026
When FHSU talks about closing down the Sternberg, they are saying that the people of western Kansas don't deserve the same opportunities to be citizens of our society as, say, New Yorkers. It is literally the same thing as shutting down a library...you are saying those people do not deserve literacy
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J Pardo @jdpardo.bsky.social · 07/10/2026
So when the ANSP talks about closing down their exhibit space, what they're actually saying is that the people of the city of Philadelphia, which encompasses 1.5m people within city limits and 6.3m people in extended metro area, do not deserve the tools necessary to be good citizens of our society
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J Pardo @jdpardo.bsky.social · 07/10/2026
Supporting scientific research is part of what museums do, but it is not what museums ARE. What museums ARE is part of a wide range of institutions that promote good citizenship by giving people a window into a world outside their personal experiences and day to day grind.
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J Pardo @jdpardo.bsky.social · 07/10/2026
This is the same reason Andrew Carnegie spent his vast personal wealth building libraries and why we have invested so much in maintaining public library systems afterwards. Not because a library is a fun place or makes lots of money, but because literacy is critical for responsible citizenship.
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J Pardo @jdpardo.bsky.social · 07/10/2026
I posted this last week without comment, but I'm going to comment now. The people who established the system of museums in the West had a very specific reason for doing so: they thought that having an appreciation for the wonders of the world was absolutely necessary for being a good citizen.
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J Pardo @jdpardo.bsky.social · 07/10/2026
Increasingly clear that the thought process here is not that the museum is expensive to maintain, but that value can be gained by selling it off piecemeal. This alone should be reason for Mason to resign immediately.
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Thomas R. Holtz, Jr. @arctomet.bsky.social · 07/10/2026
Embryos resolve the enigmatic origin of the theropod wishbone | Science Advances www.science.org/doi/10.1126/...
science.org
Embryos resolve the enigmatic origin of the theropod wishbone
The origin of the avian wishbone (furcula)—present since theropod dinosaurs—remains unsolved. Its homology is still debated, with competing hypotheses proposing derivation from the clavicles, the inte...
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J Pardo @jdpardo.bsky.social · 06/10/2026
You don't need to get curatorial permission if you run this experiment in the field before it's accessioned
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Michael Hendricks 🇨🇦 @michaelhendricks.bsky.social · 06/10/2026
Watson's dishonesty and nastiness is multifaceted here...“Without further hesitation I implied that she was incompetent in interpreting X-ray pictures” was about A-DNA, but he conflates this with B-DNA (photo 51) to claim the helical insight was his. Wilkins comes off much worse in this light too.
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Jack Stack @jackstack.bsky.social · 06/10/2026
Hot off the presses! I reviewed the history of early ray-finned fishes, with a focus on their morphology, fossil record, and taxonomy. My principal goal is a guide for other workers to make the rich record of early actinopterygian evolution more broadly available. dx.doi.org/10.1002/jmor...
dx.doi.org
The Evolutionary History of Early Ray‐Finned Fishes (Pan‐Actinopterygii)
Ray-finned fishes, the most diverse living vertebrate clade, include over 600 extinct early actinopterygian species whose evolution is an enigma.
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J Pardo @jdpardo.bsky.social · 06/10/2026
Wow back to back today!
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Jack Stack @jackstack.bsky.social · 06/10/2026
New paper on some very large ray-finned fish fossils! Thank you to Elizabeth Furman this awesome illustration. TLDR: Large early ray-finned fishes are rare, but show very different morphologies to the point that big body size is associated with distinct ecomorphologies. mapress.com/zt/article/v...
mapress.com
Fossils of an over 1-meter-long Permian ray-finned fish (Actinopterygii) from the western USA highlight multiple origins of large body size in stem-group actinopterygians | Zootaxa
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Science Magazine @science.org · 05/10/2026
Exclusive: A new analysis refutes James Watson’s claim that he was the first to recognize the significance of the famed photograph 51. scim.ag/4rTKck8
scim.ag
How did Rosalind Franklin miss the helix in her iconic DNA image? She didn’t
New analysis refutes James Watson’s claim he was first to recognize significance of famed photograph 51
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J Pardo @jdpardo.bsky.social · 05/10/2026
Probably. Seems like a lot of work after you've notched your fillet knife on scales while trying to skin enough Progyrolepis to make a meal.
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J Pardo @jdpardo.bsky.social · 05/10/2026
I assume they were ureosmotic, so probably like hot piss
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J Pardo @jdpardo.bsky.social · 03/10/2026
Hey hey! So Seymouria is generally considered a stem amniote; it is conceivable that this is incorrect but nobody has made such a claim. We do not have larvae of Seymouria, but there are larvae known of other seymouriamorphs, notably Discosauriscus but also things like Kotlassia and Utegenia.
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Dynamognathus @dynamoterror.bsky.social · 02/10/2026
Quick sketch of Westlothiana lizziae, grabbing some lunch in early #Carboniferous Scotland. Formerly known as an early reptile-like amniote or maybe an amphibian, “Lizzie” was just reinterpreted as more early-diverging tetrapodomorph, possessing fishy gills and spiracles. #sciart #paleoart #fishart
Colored-pencil drawing of the superficially lizard-like animal Westlothiana, curling its body in a sinuous motion as it crushes a small aquatic insect nymph in its jaws. Its body is elongated, rusty brown, and covered in relatively large fish-like scales. The front legs are tiny and swept back as it lunged forwards, the hind legs are only a bit larger and spread out as if holding on to an underwater log. The head is low and oval shaped, and near the base of the front leg is a slit-like gill opening. Its eye is fairly large and looking down towards its prey.
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J Pardo @jdpardo.bsky.social · 02/10/2026
This one at AMNH was also originally a Patten specimen.
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J Pardo @jdpardo.bsky.social · 01/10/2026
I see your Bothriolepis canadensis and I raise you this beauty (unnumbered) from AMNH
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J Pardo @jdpardo.bsky.social · 30/09/2026
We thought this animal was an amniote. It has gills more fishlike than modern salamanders.
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