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danpaluh.bsky.social
Dan Paluh
@danpaluh.bsky.social
270 followers 280 following 19 posts
Assistant professor at University of Dayton. Evolution, Anatomy, Development, Natural History, Amphibians & Reptiles | https://www.paluhlab.com/
www.paluhlab.com
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danpaluh.bsky.social
Dan Paluh @danpaluh.bsky.social · Sep 2
Our new paper is out in Royal Society Open Science! The metamorphic transition of the frog mouth: from tadpole keratinized mouthparts to adult teeth doi.org/10.1098/rsos...
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Reposted by Dan Paluh
sandragoutte.bsky.social
Sandra Goutte @sandragoutte.bsky.social · 21d
Happy to share that our paper on the #evolution and #genomics of the most common #color polymorphism in #frogs is now out in @pnas.org! My favorite frogs even made the cover of this week’s issue! 🎉🐸🎉

Read the paper here: www.pnas.org/doi/10.1073/...
A pair of Ehiopian grass frogs (Ptychadena nana) on the cover of PNAS this week!
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Reposted by Dan Paluh
endofthepier.bsky.social
Henry Gee @endofthepier.bsky.social · Aug 6
A specimen of the fossil fish Norselaspis yields a wealth of information on the evolution of the head-trunk interface in vertebrates www.nature.com/articles/s41...
Novel assembly of a head–trunk interface in the sister group of jawed vertebrates - Nature
Imaging of a Devonian jawless fish reveals advanced features previously thought to be exclusive to jawed vertebrates, challenging the idea that jaws were the primary driver for the evolution of d...
www.nature.com
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Reposted by Dan Paluh
danpaluh.bsky.social
Dan Paluh @danpaluh.bsky.social · Sep 2
Our new paper is out in Royal Society Open Science! The metamorphic transition of the frog mouth: from tadpole keratinized mouthparts to adult teeth doi.org/10.1098/rsos...
2 7 19
Reposted by Dan Paluh
karlycohen.bsky.social
Dr. Karly E. Cohen @karlycohen.bsky.social · Sep 4
New paper is officially out!
Ratfish have a second jaw on their foreheads - CT + histology show they’re real teeth, built from the same tissues and signals as oral teeth.

www.washington.edu/news/2025/09...
This common fish has an uncommon feature: forehead teeth, used for mating
New findings call into question one of the core assumptions about teeth. Adult male spotted ratfish, a shark-like species native to the eastern Pacific Ocean, have rows of teeth on top of their heads,...
www.washington.edu
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Reposted by Dan Paluh
garethjfraser.bsky.social
Gareth Fraser @garethjfraser.bsky.social · Sep 3
Ever wondered how #sharks produce an unlimited supply of teeth? Our new preprint uncovers the genes within the dental stem cell niche driving lifelong tooth development. "Shark tooth regeneration: RNAseq reveals genes for unlimited dental renewal" 🦈🦷
bit.ly/47kkRHL
Shark tooth regeneration: RNAseq reveals genes for unlimited dental renewal
Sharks are masters of tooth regeneration with a rapid and unlimited tooth supply. We present a comprehensive transcriptomic analysis across five distinct compartments from the embryonic shark mouth, c...
bit.ly
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Reposted by Dan Paluh
garethjfraser.bsky.social
Gareth Fraser @garethjfraser.bsky.social · Sep 3
Excited to share our new paper by @danpaluh.bsky.social out today in @royalsociety.org Open Science; with a great team, including undergraduate researchers! "The metamorphic transition of the frog mouth: from tadpole kertanized mouthparts to adult teeth" 🦷🐸
royalsocietypublishing.org/doi/10.1098/...
The metamorphic transition of the frog mouth: from tadpole keratinized mouthparts to adult teeth | Royal Society Open Science
Teeth have been a prominent feature of most vertebrates for 400 million years, and the core regulatory network underlying embryonic tooth formation is deeply conserved. In frogs, however, odontogenesi...
royalsocietypublishing.org
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danpaluh.bsky.social
Dan Paluh @danpaluh.bsky.social · Sep 3
We also characterize the keratinized mouthparts of tadpoles as ectodermal appendages and propose that these novel vertebrate structures may have originated by partially co-opting the program that typically mediates development of mineralized teeth. More work is underway to explore this hypothesis!
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danpaluh.bsky.social
Dan Paluh @danpaluh.bsky.social · Sep 3
4) We searched for vestigial dental development on the toothless frog mandible. We found no definitive evidence of tooth rudiments initiating in the lower jaw when teeth are forming on the upper jaw. Unexpected, because evolutionarily lost traits typically form at least partly during development.
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danpaluh.bsky.social
Dan Paluh @danpaluh.bsky.social · Sep 3
3) We evaluated whether the tadpole jaw impacts developing teeth. Keratin may dictate the location of the earliest dental placodes, which are positioned far behind the tadpole "beak". Did keratin similarly displace teeth during the evolution of turtles, birds, & non-avian theropod dinosaurs?
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danpaluh.bsky.social
Dan Paluh @danpaluh.bsky.social · Sep 3
2) We assessed if the genes underlying dental competence are conserved in the late-forming teeth of frogs. We found dental precursor expression patterns consistent with an odontogenic band, comparable to patterns observed in other vertebrates.
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danpaluh.bsky.social
Dan Paluh @danpaluh.bsky.social · Sep 3
In this paper, we 1) describe the precise timing of tooth development in a typical anuran, the Cuban tree frog (Osteopilus septentrionalis). The earliest indication of tooth development is at the final stage of tadpole development (Gosner 40), coinciding with the larval keratinized mouthparts.
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danpaluh.bsky.social
Dan Paluh @danpaluh.bsky.social · Sep 2
Our new paper is out in Royal Society Open Science! The metamorphic transition of the frog mouth: from tadpole keratinized mouthparts to adult teeth doi.org/10.1098/rsos...
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Reposted by Dan Paluh
fishfetisher.bsky.social
Emily Troyer @fishfetisher.bsky.social · Sep 1
Excited to announce that the 1st paper from my postdoc is now out in @currentbiology.bsky.social ! Using a large dataset of 3D preserved fossils, we explore the diversification of jaws in early bony fishes. 1/15
www.cell.com/current-biol...
Macroevolutionary role reversals in the earliest radiation of bony fishes
Troyer et al. examine lower jaw evolution in Silurian-Devonian bony fishes and find substantial differences in patterns of morphological disparity, rates of shape evolution, and functional diversity b...
www.cell.com
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Reposted by Dan Paluh
jmhuie.bsky.social
Jonathan Huie, PhD @jmhuie.bsky.social · Aug 28
Excited to share the first paper from my PhD!

We looked at what traits help Aneides salamanders excel at climbing using museum specimens, CT scans, SEM, and more! No claws or toe pads, so how do they do it? In short, with long limbs, big feet and grippy toes! 🦎🧪

DM for PDF

doi.org/10.1098/rspb...
Phylogeny of Aneides and Plethodon with animal photos Phylomorphospace showing body shape variation Morphospace of toe bones and box lots showing estimated gripping force Representative SEM images of salamander feet
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Reposted by Dan Paluh
tdcapellini.bsky.social
tdcapellini.bsky.social @tdcapellini.bsky.social · Aug 27
1) I am delighted to present this terrific tour de force research conducted by my post-doc Dr. Gayani Senevirathne @gayani.bsky.social and published today in Nature -
www.nature.com/articles/s41...
The evolution of hominin bipedalism in two steps - Nature
The human pelvis exhibits distinct spatiotemporal ossification patterns and an ilium cartilage growth plate that is shifted perpendicularly compared with those of other mammals and non-human primates—...
www.nature.com
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Reposted by Dan Paluh
ericsurette.bsky.social
Eric Surette @ericsurette.bsky.social · Aug 26
Hello Bluesky: Long time listener, first time poster! Excited to share the first publication of my Ph.D. work studying the development of appendage shapes in @plosbiology.org! The zebrafish caudal fin is quite distinctive, and we examine the timing and mechanisms of how its shape might come to be!
plosbiology.org
PLOS Biology @plosbiology.org · Aug 26
Caudal fins show great variation in shape between diverse fish species. New research reveals that #developmental cues in embryonic tissues involving the Sonic hedgehog pathway imprint fin #morphology, highlighting a critical window for modulating appendage morphology. 🧪
plos.io/4mydLnA
Brightfield image of an adult zebrafish caudal fin displaying a “truncate” shape and aberrant pigment pattern. This individual was exposed to transient overexpression of transgenic sonic hedgehog a at 2 days post fertilization, resulting in increased growth of rays at the center of the fin and disruption of the normally horizontal pigment stripes. Credit: Eric Surette and Stephanie Robinson.
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Reposted by Dan Paluh
codylimber.bsky.social
Cody Limber @codylimber.bsky.social · Aug 26
My feather cell type paper is finally out! doi.org/10.1111/ede.... We’ve packed a ton of stuff into this paper but I’ll go through some highlights in this thread!
Genetic Characterization of the Cell Types in Developing Feathers, and the Evolution of Feather Complexity
We used single cell sequencing to investigate the cell types of developing chicken feathers. From these data, we are able to describe the transcriptional profile of feather cell types, look at their ....
doi.org
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Reposted by Dan Paluh
emilytaylorscience.com
Emily Taylor @emilytaylorscience.com · Aug 25
It's a great week to have Project RattleCam on your second monitor or TV! There is a good chance of rain in Colorado every day, and a chance to see the baby rattlesnakes engaging in "pupcake" behavior (pup pancakes!).

Watch live at RattleCam.org

www.nationalgeographic.com/animals/arti...
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Reposted by Dan Paluh
lizmillermacroevo.bsky.social
Dr. Elizabeth Santos @lizmillermacroevo.bsky.social · Aug 21
I am recruiting graduate students to begin August 2026. Apply by Nov 15th!
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Reposted by Dan Paluh
zoojlinnsoc.bsky.social
Zoological Journal of the Linnean Society @zoojlinnsoc.bsky.social · Aug 18
Tadpoles have...TEETH?! An evolutionary novelty of anuran tadpoles, the taxonomic distribution of keratinized labial teeth remains a mystery. Yet here, variation in row number was studied in a phylogenetic context!
If you're bitten by a tadpole do you turn into a frog..? 🌍🧪👇
Diversity and development of labial tooth row formulae in tadpoles
Abstract. Keratinized labial teeth of the oral apparatus are a conspicuous evolutionary novelty of anuran tadpoles. Although several comparative studies ha
doi.org
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Reposted by Dan Paluh
drscanley.bsky.social
Ed Stanley @drscanley.bsky.social · Aug 14
Keeping it local for world lizard day- Rhineura floridana, also known as the Florida worm lizard or, brilliantly, the thunderworm, is a truly bizarre and wonderful creature. Eyeless, burrowing and restricted to the sandy soils of the sunshine state. What a fabulous weirdo!
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Reposted by Dan Paluh
xenbase.bsky.social
Xenbase @xenbase.bsky.social · Jul 2
2025 Midwest Regional Meeting of the Society for Developmental Biology, Sept. 19-21: Registration and Abstract Submission now open! midwestsdbincincy.org #science #devbio #xenopus #frogs
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danpaluh.bsky.social
Dan Paluh @danpaluh.bsky.social · Jun 19
Check out our new paper on the hemibacula of Aristelliger geckos!
aaronhgriffing.bsky.social
Aaron Griffing @aaronhgriffing.bsky.social · Jun 19
Excited to share a new #OA paper in @journalofanatomy.bsky.social detailing evolution and development of hemibacula: bizarre mineralized elements in hemipenes of croaking geckos.

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

#GeckoEvoDevo #Aristelliger
graphical abstract for our paper showing µCT images, histology, and illustrations of croaking gecko hemipenes hemibaculahttps://onlinelibrary.wiley.com/doi/10.1111/joa.70009
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danpaluh.bsky.social
Dan Paluh @danpaluh.bsky.social · Jun 6
"Carrot-tailed" chuckwalla (Sauromalus ater) basking in South Mountain Park, Phoenix
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Reposted by Dan Paluh
neilshubin.bsky.social
Neil Shubin @neilshubin.bsky.social · May 21
New paper from the lab: Our teeth arose as sensory organs on the outside of the body of ancient jawless fish.!! Congrats to Yara Haridy and the team!
Background and video: phys.org/news/2025-05...
Open Access Paper: www.nature.com/articles/s41...
News and Views: www.nature.com/articles/d41...
Teeth first evolved as sensory tissue in the armored exoskeletons of ancient fish, fossil scans find
Anyone who has ever squirmed through a dental cleaning can tell you how sensitive teeth can be. This sensitivity gives important feedback about temperature, pressure—and yes, pain—as we bite and chew ...
phys.org
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