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RC Hoover

@rchoover.bsky.social
666 followers 568 following 84 posts

He/him. Fishes! Morphology! Micro-CT! PhD Candidate in The Convergence Lab @ UMN/ Bell Museum.

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Reposted by RC Hoover
Professor John R. Hutchinson @johnrhutchinson.bsky.social · 29/09/2026
New paper! Brandon Kilbourne conducted a huge data collection effort for the limb muscle architecture (masses, fascicle lengths, pennation angles; thereby PCSAs) of mustelid mammals. We found conspicuous relationships with morphology and locomotor mode. link.springer.com/article/10.1...
link.springer.com
Muscle architecture in mustelid mammals: anatomical proxies for muscle function and their relation to locomotor habit - BMC Ecology and Evolution
Background Though skeletal adaptations for locomotion in mammals are well documented, possible limb adaptations in terms of muscle architecture have received far less study. Examining mustelid mammals...
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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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Zebrafish Rock! @zebrafishrock.bsky.social · 27/09/2026
Very cool #cichlid paper (and Bluetorial) from @scottjuntti.bsky.social et al 🔗 : www.cell.com/iscience/ful...
cell.com
Complex pectoral-fin-driven locomotion underlies refined visuomotor behavior in the cichlid Astatotilapia burtoni
Zoology; Neuroscience; Evolutionary biology
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Jack Stack @jackstack.bsky.social · 20/09/2026
New lecture on natural selection! Please take a listen. youtu.be/h-Czz8WBIm0?...
youtu.be
Why do animals match nature, almost?
YouTube video by Paleobiology with Doctor Stack
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Dr Mark D. Scherz @markscherz.bsky.social · 21/09/2026
🚨We're hiring a new Curator of Mammals!!🚨 🦍🐕🦝🐅🦓🦌🐃🐖🐏🐫🐘🦏🦛🐿️🦔🦇🦥🦦🦨🦘🦡🐋🦭🦒🧸 Come join the Vertebrate Unit at @nhmdk.bsky.social—a fantastic team in the heart of Denmark's beautiful capital! Amazing collections, incredible history. Please share widely! 🧪🏛️ candidate.hr-manager.net/ApplicationI...
candidate.hr-manager.net
Tenure Track Assistant Professor or Associate Professor and Curator of Mammals
Tenure Track Assistant Professor / Associate Professor, and Curator of Mammals at Natural History Museum Denmark The Natural History Museum Denmark wishes to ap
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Sarah McAnulty, Ph.D. @sarahmackattack.bsky.social · 22/09/2026
We have *six days* left until the Academy of Natural Sciences, North America's oldest Natural History museum, is scheduled to close it's doors. Here are *six reasons* why we cannot - and will not- let that happen.
a slide that says 6 days until the doors close -- 6 reasons we can keep them open, save-the-academy.org @savetheacademy
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Jack Stack @jackstack.bsky.social · 18/09/2026
Advanced imaging and statistics are great tools but create the same problem. We gravitate towards complicated solutions to simple problems, to the point that some reviewers now seem to think that basic morphological work is 'eye-balling' a specimen. Like yes I did use my eyes, as opposed to what?
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Professor John R. Hutchinson @johnrhutchinson.bsky.social · 31/08/2026
This excellent website allows you to scroll down into the deep sea and get a better feeling for how profoundly deep it is. And what lives where. neal.fun/deep-sea/
neal.fun
The Deep Sea
Scroll down the deep sea in this interactive page.
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Dr. Elizabeth Santos @lizmillermacroevo.bsky.social · 04/09/2026
Do you like snailfishes? lumpsuckers? clingfishes? New phylogeny dropped, and to toot our own horn it's really good! www.science.org/doi/10.1126/...
new phylogeny including snailfishes, lumpsuckers, rock-climbing gobies, and clingfishes showing forms of pelvic suction disc evolution
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Kory Evans Ph.D @sternarchella.bsky.social · 11/09/2026
Really excited to share our latest paper with you! We examine patterns of skull shape evolution in an awesome group of fishes and show that they rapidly innovated following the mass extinction event that wiped out the dinosaurs. urldefense.com/v3/__https:/...
urldefense.com
Selection, constraints, and contingency drive mosaic patterns of evolution during the carangarian adaptive radiation
Adaptive radiations generate remarkable morphological diversity, yet traits often diversify at different rates and modes, producing mosaic patterns of evolution. Modularity, the semiautonomous organization of traits, can shape how selection and ...
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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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Emily Troyer @fishfetisher.bsky.social · 20/08/2026
For those that use 3D Slicer, what desktop system setup and specs do you like best for segmentation/landmarking?
digital model of a cichlid fish based on ct scan data
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John P. Friel, Ph.D. @friel.bsky.social · 20/08/2026
Banse, M., M. Van Steenberge, G. Sonet, et al. 2026. Echoes of Evolution in Holocentridae: Harmony Between Phylogeny, Morphology and Acoustics. Ecology and Evolution 16, no. 8: e74152. 🐟🧪 doi.org/10.1002/ece3....
onlinelibrary.wiley.com
Echoes of Evolution in Holocentridae: Harmony Between Phylogeny, Morphology and Acoustics
Using phylogenetic, morphological, and acoustic data from 53 species, we reconstructed the evolution of acoustic communication in nocturnal reef fishes of the family Holocentridae. Our results reveal...
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Emily Troyer @fishfetisher.bsky.social · 17/08/2026
Camera recommendations for fish specimen photography? Ideally these would be able to be used for 2d morphometrics.
A red squirrelfish pinned to a mat for specimen photography.
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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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John P. Friel, Ph.D. @friel.bsky.social · 14/08/2026
Wake up babe! A new online resource for fish nerds just dropped. 🐟🧪 www.floridamuseum.ufl.edu/discover-fis...
floridamuseum.ufl.edu
Fish Families of the World Gallery
This searchable gallery includes entries for fish families of the world, which may include photographs of preserved specimens, reconstructed CT and photogrammetry 3D models, xrays, characteristics for...
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Naomi Kritzer @naomikritzer.bsky.social · 11/08/2026
Don't forget to vote! If you live in Minneapolis or St. Paul and hit a down-ballot race you've done no research on, my blog has a roundup (with my recommendations but also links to info) and you can find links to all my primary season posts here: naomikritzer.com/2026/08/06/p...
naomikritzer.com
Primary Election 2026 Sample Ballot / Index of Posts
Minnesota’s primary election is TUESDAY, AUGUST 11TH, which is this coming Tuesday as I post this. For the convenience of everyone looking up races from the voting booth (or the people who ar…
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Anya Auerbach @aauerbach.bsky.social · 06/08/2026
This semester I'm designing a freshman seminar I've titled "Evolution and Society". Post-defense I'm now working on course planning details, & have both too many ideas & worry what I'm neglecting.. What would you consider an essential topic(s) or reading(s) for a class like this? Please do share!
Image of the course description, which reads: Our society has been shaped by evolutionary ideas. Learning about evolution has led people to question human nature, our place in the natural world, and what that means for us as individuals and a society. Through reading, discussion, and museum visits, this class will explore how evolutionary study has filled us with wonder and a sense of kindship with all living things, been used to justify some of humanity’s greatest atrocities, and continues to be misused and misunderstood today. With grounding in the logic of evolutionary theory, we will ask how understanding evolution does – or doesn’t – help us understand ourselves. Field trip(s) required.
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John P. Friel, Ph.D. @friel.bsky.social · 05/08/2026
Meet the Sea Muppets! Don't let the common name fool you. These are, in fact, a new genus of syngnathid fish that have independently evolved morphology strikingly similar to that of their famous Seahorse cousins.🐟🧪 journaloflostspecies.org/index.php/jl...
journaloflostspecies.org
Australyichthys gen. nov. (Teleostei, Syngnathidae), a lost mesophotic lineage from southern Australia, with description of A. aegis sp. nov. and reclassification of Hippocampus minotaur and H. parado...
Australyichthys gen. nov. is described as a new genus of Syngnathidae (seahorses, pipefishes, seadragons, pipehorses and pygmy pipehorses) endemic to temperate mesophotic habitats of southern Australi...
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The Anatomical Record @anatrecord.bsky.social · 05/08/2026
Pleased to share our latest special issue: Feeding biomechanics in vertebrates & beyond! The issue brings together studies spanning insects, fishes & mammals to explore feeding biomechanics anatomypubs.onlinelibrary.wiley.com/toc/19328494... Guest Editors: Böhmer & Winkler
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Anya Auerbach @aauerbach.bsky.social · 27/07/2026
I’d really love to connect with any Cleveland-region folks! I confess that I’ve only driven through Ohio before 😅 Finally, I’ll still be looking for postdoc positions for the ‘27-‘28 academic year. Job application cycles in our field are brutal.
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Anya Auerbach @aauerbach.bsky.social · 27/07/2026
Since I never got around to writing a thread when my first paper came out (I was in the field in Madagascar at the time…) I’ll take this opportunity to share it. Vangas are exceptionally weird and wonderful birds and I think we did some pretty cool work here. doi.org/10.1093/evol...
doi.org
Tempo and mode of evolution across multiple traits in an adaptive radiation of birds (Vangidae)
Abstract. An ongoing challenge in macroevolutionary research is identifying common drivers of diversification amid the complex interplay of many potentiall
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Jack Stack @jackstack.bsky.social · 26/07/2026
Any invertebrate zoologists: looking for resources to store and properly curate extant specimens. Anything from boxes to advice. Have a teaching collection that needs love, because this type of thing makes me sad. I want to teach this part of the animal kingdom as best I can!
Starfish with a broken leg
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The Anatomical Record @anatrecord.bsky.social · 20/07/2026
New study reveals 2D morphometrics captures major patterns of fish body shape variation but can underestimate subtle 3D features. For broad comparative studies, 2D is often sufficient; for fine-scale morphology, 3D remains essential Torgersen et al anatomypubs.onlinelibrary.wiley.com/doi/10.1002/...
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Woods Hole Oceanographic Institution @whoi.edu · 15/07/2026
🦈 Basking sharks are known for grazing on small fish & zooplankton at the surface, but a recent WHOI study shows that they may be 1,000+ meters to find prey in the mid-ocean twilight zone! 📲Dive deeper with @wcai-npr.bsky.social: go.whoi.edu/cai-sharks
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Matt Friedman @friedmanlab.bsky.social · 12/07/2026
Huge congrats to Lindsey DeHaan on receiving the Stoye Award for best student presentation in ichthyology at #JMIH26 in New Orleans! Lindsey presented work on macroevolutionary shifts in spiny eels, representing one of her dissertation chapters. 📸: @leicurtis.bsky.social
Photo of a presenter at a lectern with a screen of talk acknowledgements behind them.Picture of a screen with slide announcing Lindsey DeHaan as winner of the Stoye Award.Lindsey standing with two ASIH representatives on a stage holding a giant prop check.
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the beggars out of here getter @milesklee.bsky.social · 13/07/2026
My privilege to share some lovely stories from the science community about what Sam Neill's timeless performance as Dr. Alan Grant in Jurassic Park meant to them—and why it will continue to inspire kids to chase their own discoveries for years to come.
wired.com
Sam Neill Inspired a Generation of Scientists
The actor, who died at age 78 on Monday, embodied a passionate approach to research and positive masculinity in his role as paleontologist Alan Grant in the 1993 blockbuster Jurassic Park.
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Jeffrey Ross-Ibarra @jrossibarra.bsky.social · 12/07/2026
Just added a couple more job apps (thanks Rachel and Arun!) but if you've gotten a job in industry, academia (R1, PUI, whatever!) in the last 5 years or so, please consider submitting your job app materials to help other folks! github.com/RILAB/statem...
github.com
GitHub - RILAB/statements: Successful Job Applications and Grants
Successful Job Applications and Grants. Contribute to RILAB/statements development by creating an account on GitHub.
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Emily Troyer @fishfetisher.bsky.social · 10/07/2026
The Sam Noble Museum is hiring a Collection Manager for the Fish Collection! Come work with me in Oklahoma! Please share widely! #TeamFish #MuseumJobs jobs.ou.edu/jobs/curator...
jobs.ou.edu
Curator Archivist - Norman, Oklahoma, United States
Pay Range: Targeted salary $18.99 per hour, based on experience Benefits Eligible: Yes Work Schedule: Monday – Friday, 8:00 a.m. to 5:00 p.m. (may include some weekends) Travel: May be required For Be...
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Matt Friedman @friedmanlab.bsky.social · 09/07/2026
Impressive new systematic treatment of fossil and living clupeomoeph fishes by Marramà and Carnevale: sciencepress.mnhn.fr/en/periodiqu...
sciencepress.mnhn.fr
A phylogeny and revised classification of clupeomorph fishes (Teleostei, Otomorpha)
The study of the Clupeomorpha Greenwood, Rosen, Weitzman & Myers, 1966 (herrings and allies) has made remarkable progress in recent years. Since the publication of the monographic work by Lance Gr...
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Atal Pande @atal-pande.bsky.social · 03/07/2026
Really excited to share that my first PhD chapter is now out in @currentbiology.bsky.social! 🕷️👀 We show that visually hunting spiders have repeatedly evolved forward-facing eyes, highlighting the remarkable evolutionary flexibility of their modular visual system. doi.org/10.1016/j.cu...
cell.com
Hunting ecology predicts eye arrangements in the modular visual system of spiders
Pande et al. show that visually hunting spiders have convergently evolved forward-facing eyes. The positions and orientations of the eyes show the greatest morphological disparity and fastest evolutio...
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Princess Vimentin PhD | Cancer Biologist @princess-vimentin.bsky.social · 03/07/2026
GLP-1, the reason why Ozempic & Wegovy work, was discovered in fish (1987) & lizards (1990). Now, under this new rule, decades of basic FOUNDATIONAL research that led to these blockbuster drugs, that we have access to, would be considered as waste. Get my drift? 🧪 www.science.org/content/arti...
science.org
Provision buried in controversial U.S. rule change would help people legally challenge ‘woke’ federal research
White House asserts expanded authority to prosecute any wasteful spending “in the national interest”
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Natural History Museum of Los Angeles County @nhm.org · 28/06/2026
👀 Our collections keep growing day by day! Dr. Bill Ludt, Assistant Curator of Ichthyology, shares some of the latest additions to the Museum's fish collection.
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Dr. Elizabeth Santos @lizmillermacroevo.bsky.social · 26/06/2026
Two new 🐟 preprints! First with @cmartinez.bsky.social on diversification in a wonderfully wacky group of deep-sea fishes www.biorxiv.org/content/10.6...
A CT scan of Malacosteus (the loosejaw dragonfish) with arrow showing gap between vertebral column and skull
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Dr. Elizabeth Santos @lizmillermacroevo.bsky.social · 26/06/2026
Second, our big effort to (1) make a new fish tree (2) date it (3) define taxon names (4) build the largest fish CT scan dataset to-date (5) answer ecomorphological questions- whew! @sternarchella.bsky.social @arciladk.bsky.social www.biorxiv.org/content/10.6...
Phylogeny of Eupercaria (within spiny-rayed fishes) with CT scan icons showing different clades
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John P. Friel, Ph.D. @friel.bsky.social · 26/06/2026
You've got mail! Katherine Maslenikov, Ichthyology Collections Manager at the Burke Museum shares how she sends fish specimens on loan to researchers around the world. 🐟
youtube.com
How to Send Fish in The Mail
YouTube video by Burke Museum
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Katherine Corn 🌽 @kacorn.bsky.social · 26/06/2026
Really excited to share that Chris Martinez & my paper on ecological, functional, & evolutionary diversity produced by novel jaw joints in fishes is out at@evojlinnsoc.bsky.social! We show how modulation of these new joints can produce a wide range of functional opportunities doi.org/10.1093/evol...
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Prosanta Chakrabarty @prosanta.bsky.social · 26/06/2026
Y'all - the Smithsonian is hiring three new curators - herpetology, ichthyology, and ornithology! Notably, this is a 2nd fish curator position - i.e., not the same as the one advertised last month. So if you applied for that one apply again. www.usajobs.gov/job/873849000
Curator of Vertebrates

Smithsonian’s National Museum of Natural History currently has openings for three early-career Research Curators in Vertebrate Zoology, one each from the disciplines of ornithology, herpetology and ichthyology. The Department of Vertebrate Zoology seeks candidates with demonstrated expertise in, and a commitment to, collections-based research centered on systematics and evolution of birds, reptiles, amphibians, and fishes. This includes the ability to pursue an original approach to systematics and comparative analyses using, for example, morphology, development, and/or molecular data, and showing evidence of broader impacts or applications in evolutionary biology and/or collections-based ecology, as demonstrated by a record of peer-reviewed publications.

Candidates must have demonstrated the ability to establish an externally funded research program and to contribute to the growth and curation of the collections. Research in the Department is supported by the Museum’s shared laboratories, including the Laboratory of Analytic Biology and the Scientific Imaging facility, among others. The Department’s scientific collections are the largest in the world for fishes, amphibians, and reptiles, and the third largest for birds.

These federal positions will be filled at the GS-12 level, with a starting salary of $102,415, and excellent benefits. The positions are permanent and require a one-year probationary period. 

The official announcement is posted on USAJOBS, where applications must be submitted.
https://www.usajobs.gov/job/873849000

Please be sure to read the announcement and instructions carefully, as the process of applying via USAJOBS is stringent and differs from applying for an academic position. This website offers helpful advice: https://serc.si.edu/careers/tips-applying-federal-jobs

Please contact the Search Committee Chair, Michael McGowen (mcgowenm@si.edu) or the Department Chair, Helen James (jamesh@si.edu) with any questions.
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bioRxiv Evolutionary Biology @biorxiv-evobio.bsky.social · 25/06/2026
Macroevolutionary consequences of twin neck innovations in deep-sea dragonfishes www.biorxiv.org/content/10.64898/20…
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Aintzane Santaquiteria @asantaquiteria.bsky.social · 25/06/2026
Happy to share our new paper in Nat. Comm. on the evolution of planktivory in surgeonfishes and relatives 🐠🧬 Combining fossils and genomics, we find multiple independent origins of planktivory, plus convergent positive selection in key genes linked to planktivory. 👉 www.nature.com/articles/s41...
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Emily Troyer @fishfetisher.bsky.social · 23/06/2026
New preprint on Eupercarian fishes is here! We present a new phylogeny and skull shape analysis of this massive clade! www.biorxiv.org/content/10.6...
biorxiv.org
Ecological axes of skull diversification in a massive vertebrate radiation
Eupercarian spiny-rayed fishes are one of the largest vertebrate radiations, rivaling mammals and occupying nearly every aquatic habitat. We present a densely sampled, time-calibrated phylogenomic fra...
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William B. Ludt, PhD @planet-of-fishes.bsky.social · 23/06/2026
Even giants start out small: new paper hot off the press documenting the early development of Giant Sea Bass led by Emily Ladin and Larry Allen. Link should provide free access: www.ichthyologyandherpetology.org/ihbjbf/awi20...
ichthyologyandherpetology.org
Developmental Osteology of Young-of-the-Year Giant Sea Bass, Stereolepis gigas — Ichthyology & Herpetology
Developmental Osteology of Young-of-the-Year Giant Sea Bass, Stereolepis gigas Emily S. Ladin, Michael P. Franklin, William B. Ludt, and Larry G. Allen
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Jess McLaughlin, PhD (they/them) @jfmclaughlin92.bsky.social · 22/06/2026
well this is neat! just signed up to donate a consult for all bird-related inquiries
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Ryan N. Felice @rnf.bsky.social · 19/06/2026
New paper out today! @sternarchella.bsky.social and I review how modularity and integration influence adaptive radiations and diversification. Read it here: rdcu.be/fpcSX
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Florida Museum of Natural History @floridamuseum.bsky.social · 17/06/2026
Inner Beauty 🌈🐠 Ichthyologists us a process called clearing and staining (also known as diaphonization) to expose the cartilage and skeleton of fishes. Explore our online exhibit: Inner Beauty 🩻 Skeletons Revealed from the Museum’s Fish Collection www.floridamuseum.ufl.edu/exhibits/onl...
light passes through a processed fish showing its skeletal structure and internal organs in vibrant blues and reds against a white background.Glass jar containing a preserved fish specimen in a clear liquid.Glass jar containing a preserved fish specimen that has been processed to show its skeleton in bright blue in a clear liquid.
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Prosanta Chakrabarty @prosanta.bsky.social · 16/06/2026
Huge Fish Curator gig is advertised! Assistant Curator of Fishes at the Florida Museum of Natural History (part of Uni of. Florida) explore.jobs.ufl.edu/en-us/job/54...
explore.jobs.ufl.edu
University of Florida - Details - Assistant Curator of Ichthyology
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Matt Bracken @brackenlab.bsky.social · 15/06/2026
One of the many great things about marine labs is that they often have aquaria featuring cool, local critters. #MarineLife 🌊🦑
The anterior end of a decorated prickleback (*Chirolophus decoratus*), highlighting its branched cirri: the “decorations” referred to in both common and scientific names that could help camouflage it.
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Plant Science Spotlight @plant-sci.bsky.social · 13/06/2026
Don’t reach for ChatGPT Images or Nano Banana as your first option when creating scientific images There are multiple free and open-source images, icons, and tools for creating scientific illustrations. #plantscience @stephenturner.us blog.stephenturner.us/p/free-open-...
blog.stephenturner.us
Free and open-source images, icons, and tools for creating scientific illustrations
Phylopic, NIH Bioart, Bioicons, Scidraw, Open Science Art, Health Icons, Servier Medical Art, Biodiversity Heritage Library, the Noun Project, Segment Anything, Excalidraw, draw.io, Biographics
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Florida Museum of Natural History @floridamuseum.bsky.social · 10/06/2026
Museum Resources 🩻 Digital Imaging Our Digital Imaging Division facilitates the production, processing and analysis of two- and three-dimensional digital image data. 🌈 Browse some of the many museum specimens they have worked on: www.floridamuseum.ufl.edu/digital-lab/...
a turtle has been scanned and its shell is in cross section while the rest of its skeleton is colored with primary colors and numbered as if to match a corresponding anatomy charttwo lizard specimens are carefully curled into tight circles and scanned with their claws and snouts in yellow while their scaly skin is shades of green and purplesome kind of fish skeleton has been scanned to show its bones and hard tissue in vibrant colors against a black background with a full length skeleton view above and a close up of the complicated skull belowa sea creature that is an elongated oval like some kind of ray or skate with a stubby tail and dark patterns on its brown body like irregular rings
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