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Keiffer Williams

@keifferwilliams.bsky.social
93 followers 105 following 10 posts

Visiting Assistant Professor at Berea College. I'm a vertebrate evolutionary biologist, with a particular interest in fishes and their teeth. keifferwilliams.com

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Reposted by Keiffer Williams
Jack Stack @jackstack.bsky.social · 28/09/2026
Really cool and important paper, as an enormous part of the fossil record of fishes is isolated teeth. @elizabethsibert.bsky.social academic.oup.com/iob/advance-...
academic.oup.com
Typifying tiny teeth: A standardized coding system to quantify morphological variation in fish teeth for comparative ecological, evolutionary, and functional morphological studies
Abstract. Teeth play a crucial role in vertebrate ecology as one of the main interfaces between predators and their prey. As the most diverse vertebrates o
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Jonathan Huie, PhD @jmhuie.bsky.social · 11/09/2026
I heard you like clingfishes! Check out our new preprint on the evolution and ecomorphology of their adhesive discs and skull! doi.org/10.64898/202...
A smattering of clingfish skulls visualized with CT scans
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Monterey Bay Aquarium @montereybayaquarium.org · 01/09/2026
🍣 Choosing sustainable seafood is a positive action nearly all of us can take to protect ocean habitats and wildlife. Our refreshed Sushi Guide will make those choices even easier.
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Andrew D Thaler @drandrewthaler.bsky.social · 31/08/2026
Teaching with Monsters: From Whimsy to Shadow from the Journal of Folklore and Education is out now! Included in this volume is, at long last, our paper: Jabberwocks and Snallygasters: Exploring the Role of Dungeons & Dragons in Environmental Education jfepublications.org/journal/vol-...
jfepublications.org
Teaching with Monsters: From Whimsy to Shadow - Journal of Folklore and Education
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Mark Westneat 🐟 @mwestneat.bsky.social · 16/08/2026
Surgeonfishes are cool! Our Evolution paper now out in final form, the amazing patterns of change in fish shape and covariance (new method!) elegantly revealed by @linnealungstrom.bsky.social 🐟🐠🦑🌿 academic.oup.com/evolut/artic...
academic.oup.com
Phylogenetics, trait covariance analysis, and the evolution of fin and body shape in the surgeonfishes
Abstract. Insights into ecomorphology are enriched when investigating evolutionary correlations between ecologically and functionally important traits. How
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Keiffer Williams @keifferwilliams.bsky.social · 14/08/2026
What an awesome resource! I'll be making good use of this in my comparative anatomy classes 🐟🐠🧪
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Matt Friedman @friedmanlab.bsky.social · 11/08/2026
In 2019, Willy Bemis came to Michigan and gave a lecture on ocean sunfishes at UMMP. One of the most engaging talks I have ever attended. It included work that went into a new monograph published this week and led by Kate Bemis: scholarlypress.si.edu/publications...
Cover of a monograph titled "Comparative anatomy of ocean sunfishes (Tetraodontiformes: Molidae). Authors are KE Bemis, JC Tyler, CD Carson, EJ Hilton, and WE Bemis. The cover is blue with a black horizontal band in the upper third featuring photographs of larvae of the three extant genera of ocean sunfishes.
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Matt Friedman @friedmanlab.bsky.social · 06/05/2026
Ray-finned fishes are famously diverse, but we know little about their brains or cranial endocasts. @rodrigoichthys.bsky.social opens this black box with a dice-CT survey of 86 species across the actinopt tree of life. #OA in @royalsocietypublishing.org 🐟🧠 royalsocietypublishing.org/rspb/article...
Figure of radial phylogeny featuring colored branches and tips representing brain-to-endocranial cavity correlation and endocast complexity. Select endocasts (rendered as semitransparent gray) and brains (rendered in peach) are shown for some terminals. They show substantial variation in shape and the degree of brain:endocast correspondence.

From Figueroa & Pierce (2026) Proc Biol Sci 293 (2070): 20253277 .
https://doi.org/10.1098/rspb.2025.3277

Shared under https://creativecommons.org/licenses/by/4.0/
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Noah Bressman, PhD @noahwithfish.bsky.social · 28/04/2026
With my co-authors, I am excited to share our recent publication! Morphological Relationships of Pectoral and Dorsal Spines of Invasive Blue Catfish, Ictalurus furcatus, Over Ontogeny. Let me know if you me to send you a free pdf! 🐟🧪 academic.oup.com/icb/article-... (1/3)
academic.oup.com
Morphological Relationships of Pectoral and Dorsal Spines of Invasive Blue Catfish, Ictalurus furcatus, Over Ontogeny
Synopsis. Blue catfish, Ictalurus furcatus, are an invasive species in the Chesapeake Bay region, known to be opportunistic predators that overlap in habit
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Nick Peoples @cichlidnick.bsky.social · 28/04/2026
For reef fishes, benthic feeding is where it’s at! Our new paper in PNAS shows that diversification rates for reef fishes increased through time, likely caused by the rise of benthic-feeding groups like surgeonfish, rabbitfish, butterflyfish, and parrotfish! Read here: www.pnas.org/doi/10.1073/...
pnas.org
PNAS
Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans...
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Michalis Mihalitsis @mikemihalitsis.bsky.social · 13/04/2026
New paper out with @cichlidnick.bsky.social and Peter C. Wainwright. We show that different habitats impact fish diversification. Habitats with a complex benthos show increased diversification rates across ray-finned fishes. www.pnas.org/doi/epdf/10....
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Florida Museum of Natural History @floridamuseum.bsky.social · 06/04/2026
A new study on iNaturalist users: Highly and casually active citizen scientists contribute equally valuable data www.floridamuseum.ufl.edu/science/high...
floridamuseum.ufl.edu
Highly and casually active citizen scientists contribute equally valuable data
T he word “nemotia”1 is a neologism, a newly coined term that, in this case, describes the sense of overwhelm and disconnect accompanying the thought that nothing you do will ever make a difference. ...
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Leroy Núñez, Ph.D. @lpnunez.bsky.social · 31/03/2026
Hey y'all. I'm a month late to this, but I wanted to share that one of my PhD chapters was published in Systematic Biology with my advisor, Frank Burbrink. Here, we explore how ecological opportunity influences phenotypic evolution in North American natricid snakes. 🧵/8
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Dr. Ciara Willis @seawillis.bsky.social · 31/03/2026
New barracudina just dropped 🎉 We see a LOT of these long, toothy deep sea fishes in our swordfish stomachs - exciting to be able to ID them more accurately in the future! www.fisheries.noaa.gov/feature-stor...
fisheries.noaa.gov
Ferocious Predator and Important Prey: New Barracudina Species Named for Smithsonian Biologist
Fisheries biologists recently described a new species of barracudina found in U.S. waters in the North Atlantic. Although understudied, these small fish may play a big role in their ecosystems.
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Natalie Cooper @nhcooper123.bsky.social · 25/03/2026
Hi all. I am very excited that after 6 years I finally got my phylogenetic comparative methods book and online exercises online. Feel free to use and share. The book is here: nhcooper123.github.io/pcm-primer/. Note that it is not finished, we had to abandon it before the sunk costs fallacy broke us
nhcooper123.github.io
Phylogenetic Comparative Methods
Phylogenetic Comparative Methods
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Richard McElreath 🐈‍⬛ @rmcelreath.bsky.social · 22/03/2026
Statistical Rethinking 2026 is done: 20 new lectures emphasizing logical and critical statistical workflow, from basics of probability theory to causal inference to reliable computation to sensitivity. It's all free, made just for you. Lecture list and links: github.com/rmcelreath/s...
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SICB journals @sicbjournals.bsky.social · 16/03/2026
ICB Sensory-Skeletal Integration Underlies Diverse Bone Fusion Patterns in a Complex #Demography of #Cavefish Alyssa R Hamm et al doi.org/10.1093/icb/... This study showcases the integrated nature of sensory-skeletal development, a poorly understood phenomenon. #scientists #fish #Biologists
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Prosanta Chakrabarty @prosanta.bsky.social · 23/02/2026
Rapid and repeated evolution of pigmentation patterns in reef fishes #ichthyology link.springer.com/article/10.1...
link.springer.com
Rapid and repeated evolution of pigmentation patterns in reef fishes - BMC Biology
Background Pigmentation patterns are central to animal biology—shaping camouflage, signaling, and mate selection—and uncovering the mechanisms driving their diversification is key to understanding the...
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Mark Westneat 🐟 @mwestneat.bsky.social · 10/02/2026
Piranha bite force and tooth stress are fantastically high for their size! Check out our new paper on computational modeling of the cranial muscles and bite mechanics of the amazing piranhas. #biomechsky 🐟🧪🌿 link.springer.com/epdf/10.1007...
link.springer.com
Biomechanics, muscle modeling, and the elevated bite force and tooth stress of piranhas
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Brie Ilarde @gacatail.bsky.social · 16/01/2026
My first PhD dissertation chapter has been published! Let me know if you need a copy. Complete species-level phylogeny of Madagascar’s tufted-tailed rats, Eliurus (Rodentia: Nesomyidae) reveals hidden diversity doi.org/10.1093/zool... And please enjoy this sonnet I wrote to summarize it:
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Adam Summers @fishguy.bsky.social · 12/01/2026
Every other summer we run a fish biomechanics course at Friday Harbor Labs. It is an awesome opportunity to learn the tools of biovisualization while experiencing the rich fish diversity of the Salish Sea. Come join us! 🧪
A flyer for a fish biomechanics course at the Friday Harbor Labs this summer.
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Timothy Burke @bubbaprog.xyz · 23/12/2025
The full spiked 60 Minutes CECOT package, clean & subtitled. 1/5
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Sam Price @evovert.bsky.social · 15/12/2025
🧪🐠 I am hiring a postdoc! Work will be on patterns of biodiversity across phylogenetic scales using teleost fishes as a model. Apply by end of Jan 2026 for full consideration apply.interfolio.com/179070 I encourage folks to reach out with any questions. Please Share!
apply.interfolio.com
Apply - Interfolio {{$ctrl.$state.data.pageTitle}} - Apply - Interfolio
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Dr. Solomon David @solomonrdavid.bsky.social · 01/05/2025
My pet gar that I donated to Shedd Aquarium would recognize me and swim over to say hi when I visited her exhibit ❤️🐠 A rare hybrid gar, I raised her since she was 2 inches long, and had to re-home her when I moved to Chicago. I was happy I could visit her in her new home! TO BE CONTINUED…
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The Anatomical Record @anatrecord.bsky.social · 21/11/2025
A new analysis of Dunkleosteus terrelli reveals its massive jaws were far more cartilage-rich than once thought, reshaping ideas about muscle layout, bite mechanics & feeding style. Time to rethink this Devonian apex predator. Engelman et al.: anatomypubs.onlinelibrary.wiley.com/doi/10.1002/...
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Yawako @yawaguchi.bsky.social · 18/11/2025
I’ve released a tool to sketch and edit phylogenetic trees! yawak.jp/PhyloWeaver/ Load a Newick file and intuitively add/remove/resize branches. Useful for quick conceptual trees, extracting subtrees, or turning ideas into Newick.
yawak.jp
PhyloWeaver – Interactive phylogenetic tree editor
Edit and visualize phylogenetic trees directly in your browser. PhyloWeaver lets you interactively rearrange tree topologies and export high-quality figures for publications and presentations.
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Jack Stack @jackstack.bsky.social · 17/11/2025
Very excited to share my exploration of the phylogenetics of early ray-finned fishes, out today in the Anatomical Record! Really busy day but I’ll have more info shortly. anatomypubs.onlinelibrary.wiley.com/doi/10.1002/...
anatomypubs.onlinelibrary.wiley.com
An ontological morphological phylogenetic framework for living and extinct ray‐finned fishes (Actinopterygii)
The ray-finned fishes include one out of every two species of living vertebrates on Earth and have an abundant fossil record stretching 380 million years into the past. The division of systematic kno...
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Lisa Whitenack, PhD @whitenacklab.bsky.social · 16/11/2025
Hey, if you’re thinking about comparative anatomy textbooks for the Spring semester, you should check out ours! Free, open access, and peer-reviewed!
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Dr. Elizabeth Santos @lizmillermacroevo.bsky.social · 21/10/2025
New phylogeny and family-level classification of Stomiiformes (viperfishes, hatchetfishes, bristlemouths) bmcecolevol.biomedcentral.com/articles/10....
bmcecolevol.biomedcentral.com
Genome-wide phylogeny reshapes our understanding of the evolution of deep-sea dragonfishes, bristlemouths, viperfishes, and allies (Stomiiformes) - BMC Ecology and Evolution
Background The evolutionary relationships within Stomiiformes, a diverse order of deep-sea fishes dominating the mesopelagic and bathypelagic zones, remain contentious due to conflicting morphological...
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Matt Koski @mattkoski.bsky.social · 01/10/2025
@omgitsmejenny.bsky.social talks about her masters thesis on the effects of flower temperature on pollinator visitation and behavior
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Jack Stack @jackstack.bsky.social · 01/10/2025
Love how fish will just evolve a truly horrifying number of teeth to crush shelled creatures. Absolute nightmare, my students love seeing this stuff. From Cynthia Worcester's master's thesis (2012; linked below). digitalcommons.wku.edu/theses/1215/
Occlusal view of the teeth of a sheepshead fish, which is just a horror show of teeth.
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Peg Yacobucci @pegyaco.bsky.social · 30/09/2025
Our paper on perceptions of punctuated equilibrium - including suggestions for how to teach about this essential evolutionary concept - is now available online! doi.org/10.1017/pab....
doi.org
Taking the temperature of punctuated equilibrium on its semicentennial | Paleobiology | Cambridge Core
Taking the temperature of punctuated equilibrium on its semicentennial
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Dr Briana Pobiner @brianapobiner.bsky.social · 25/08/2025
I'm delighted that the first publication from a National Science Foundation-funded study I led studying the development and implementation of teaching resources on human and non-human evolution in Alabama high school biology classrooms was published a few days ago! (1/2)
evolution-outreach.biomedcentral.com
Teaching human evolution in Alabama high school biology classrooms: the LUDA project - Evolution: Education and Outreach
Background Multiple factors, including the context (human or non-human) in which evolution is learned and whether explicit efforts are made to try to reduce the conflict between evolution and religion...
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Amani Webber-Schultz @curlybiologist.bsky.social · 20/08/2025
I finally did it. My first chapter is FINALLY written and out for all to see. If you’ve attended my talks you 100% know what this is about. If you haven’t attended my talks, shark nostrils are more interesting than we thought. Enjoy! academic.oup.com/icb/advance-...
academic.oup.com
Who Nose What Flows: Shark Narial Denticle Morphology and Hydrodynamic Implications
Synopsis. Dermal denticles (scales) are important in influencing the movement of water around a shark’s body. To date, most of the research on denticle mor
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Denis Wirtz @deniswirtz.bsky.social · 11/08/2025
These are the most challenging times for early-career scientists and engineers. My team is doing its bit to help by maintaining and even expanding our database of funding opportunities for early-career researchers. We found 437 of them. Download it freely here: research.jhu.edu/rdt/funding-...
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Prosanta Chakrabarty @prosanta.bsky.social · 08/08/2025
Fun news: I'm hiring a postdoc in ichthyology! Please spread the word #TeamFish, and message me if you have questions. (Job requisition id is R00107333 if LSU link below takes you elsewhere.) lsu.wd1.myworkdayjobs.com/en-US/LSU/de...
lsu.wd1.myworkdayjobs.com
Postdoctoral Researcher
All Job Postings will close at 12:01a.m. CST (1:01a.m. EST) on the specified Closing Date (if designated). If you close the browser or exit your application prior to submitting, the application progre...
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Jennifer Apland @omgitsmejenny.bsky.social · 01/08/2025
I'm so excited to share my master's research! Do pollinators change their foraging behavior depending on floral and ambient temperatures? Do flowers that thermoregulate experience higher rates of pollinator visitation? Check it out below! 🏵️
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Bill Ryerson @billryerson.bsky.social · 30/07/2025
New Comparative Anatomy Textbook! Completely free to read and open access! doi.org/10.59319/YHF...
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Jonathan Huie, PhD @jmhuie.bsky.social · 30/07/2025
In @fishguy.bsky.social’s lab we have done many studies on the suction cups of dead clingfish. In this new paper, @fishyologist.bsky.social et al and I found that clingfish can control their suction and stick harder than dead ones! @sicbjournals.bsky.social 🐟 🧪 DM for PDF doi.org/10.1093/icb/...
Schematic of how we measured live clingfish suction performance in a water tunnel with pressure transducers
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Jonathan Huie, PhD @jmhuie.bsky.social · 27/06/2025
New fish paper! We found that Clinocottus globicpes eats anemones (weird!) using a novel wrestling behavior + strong jaws that likely started as adaptations for tearing algae. It also has thick skin that protects it from stinging cells. @jzoology.bsky.social 🐟🧪 DM for PDF. doi.org/10.1111/jzo....
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Nick Peoples @cichlidnick.bsky.social · 24/06/2025
Out today in @plosbiology.org! We show that two major advances in fish feeding - highly protrusible jaws and large teeth - are functionally and evolutionarily incompatible with each other. @mikemihalitsis.bsky.social and Peter Wainwright. Free to read: journals.plos.org/plosbiology/...
journals.plos.org
Incompatibility between two major innovations shaped the diversification of fish feeding mechanisms
Large teeth and highly protrusible jaws are two feeding innovations that have evolved in fishes. High-speed videography and comparative phylogenetic analyses indicate that they are incompatible with e...
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Keiffer Williams @keifferwilliams.bsky.social · 24/06/2025
I'm defending my dissertation next week, Monday June 30th at 10 AM ET. DM for a zoom link if interested!
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Keiffer Williams @keifferwilliams.bsky.social · 23/05/2025
First dissertation chapter has been published in Integrative & Comparative Biology, check it out here: academic.oup.com/icb/advance-...
academic.oup.com
Investigating best-practices for applying a quantitative tooth complexity metric to fishes
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Jon Freeman @freemanjb.bsky.social · 21/05/2025
🚨 A new rule would let career scientists like NSF/NIH program officers be replaced by political appointees Already 14,000+ public comments, deadline is Friday 📣 Comments can be short. Courts consider them—and scientists with NSF/NIH experience are especially impactful Speak up! shorturl.at/WKuBj
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