Griffin Lab
@griffinlabpaleo.bsky.social
Origin of major clades, ontogeny & evolution of form, evo+devo+paleo — Dept of Geosciences at Princeton University
Pinned
www.science.org
Very excited to share that our latest paper is out in Science! We show that the type specimen of Nanotyrannus—an isolated skull—is fully grown, showing that it is not a juvenile Tyrannosaurus rex but a distinct species (1/12)
www.science.org/doi/10.1126/...
www.science.org/doi/10.1126/...
Reposted by Griffin Lab
Congratulations to UMMP Associate Research Scientist Miriam Zelditch on the release of the third edition of the indispensable "Geometric Morphometrics for Biologists" (a.k.a. the green book)! #FossilFriday
December 6, 2025 at 1:12 AM
Congratulations to UMMP Associate Research Scientist Miriam Zelditch on the release of the third edition of the indispensable "Geometric Morphometrics for Biologists" (a.k.a. the green book)! #FossilFriday
Reposted by Griffin Lab
#FossilFriday The awesome new article in Science by
@griffinlabpaleo.bsky.social et al. adds more evidence for the validity of Nanotyrannus by showing that the hyoid bone in the holotype has adult bone histology. Here are some more images showing the ceratobranchial bone in place in the skull. 🦖
@griffinlabpaleo.bsky.social et al. adds more evidence for the validity of Nanotyrannus by showing that the hyoid bone in the holotype has adult bone histology. Here are some more images showing the ceratobranchial bone in place in the skull. 🦖
December 5, 2025 at 10:28 PM
#FossilFriday The awesome new article in Science by
@griffinlabpaleo.bsky.social et al. adds more evidence for the validity of Nanotyrannus by showing that the hyoid bone in the holotype has adult bone histology. Here are some more images showing the ceratobranchial bone in place in the skull. 🦖
@griffinlabpaleo.bsky.social et al. adds more evidence for the validity of Nanotyrannus by showing that the hyoid bone in the holotype has adult bone histology. Here are some more images showing the ceratobranchial bone in place in the skull. 🦖
Reposted by Griffin Lab
Development of the zebrafish retina captured on a light sheet microscope. Credit to @ichajaroslav.bsky.social. #ZebrafishZunday 🧪
November 23, 2025 at 8:37 AM
Development of the zebrafish retina captured on a light sheet microscope. Credit to @ichajaroslav.bsky.social. #ZebrafishZunday 🧪
Very excited to share that our latest paper is out in Science! We show that the type specimen of Nanotyrannus—an isolated skull—is fully grown, showing that it is not a juvenile Tyrannosaurus rex but a distinct species (1/12)
www.science.org/doi/10.1126/...
www.science.org/doi/10.1126/...
www.science.org
December 4, 2025 at 7:02 PM
Very excited to share that our latest paper is out in Science! We show that the type specimen of Nanotyrannus—an isolated skull—is fully grown, showing that it is not a juvenile Tyrannosaurus rex but a distinct species (1/12)
www.science.org/doi/10.1126/...
www.science.org/doi/10.1126/...
Reposted by Griffin Lab
'Tis the season for graduate school applications, so here's a reminder that I'm recruiting! My lab uses a combination of fossils, statistical phylogenetics, fieldwork, & computational methods to study macroevolutionary dynamics in the marine biosphere. Check the link below & feel free to reach out
Link to website for info regarding the opportunity, requirements, and how to apply
News
PhD and MSc positions in Phylogenetic, Computational, and/or Evolutionary Paleobiology [Posted September 2025. Deadline is January 15, 2026. See below for information about the lab, student opportu…
daveyfwright.wordpress.com
December 2, 2025 at 8:11 PM
'Tis the season for graduate school applications, so here's a reminder that I'm recruiting! My lab uses a combination of fossils, statistical phylogenetics, fieldwork, & computational methods to study macroevolutionary dynamics in the marine biosphere. Check the link below & feel free to reach out
Reposted by Griffin Lab
Happy to be a part of this big project led by Mario Bronzati & Matteo Fabbri—out today #OA in @currentbiology.bsky.social
bit.ly/3M5weun —on the brain endocast of a close pterosaur cousin & what it means for pterosaur brain evolution...maybe different from bird brain evolution. 1/2
bit.ly/3M5weun —on the brain endocast of a close pterosaur cousin & what it means for pterosaur brain evolution...maybe different from bird brain evolution. 1/2
November 26, 2025 at 5:15 PM
Happy to be a part of this big project led by Mario Bronzati & Matteo Fabbri—out today #OA in @currentbiology.bsky.social
bit.ly/3M5weun —on the brain endocast of a close pterosaur cousin & what it means for pterosaur brain evolution...maybe different from bird brain evolution. 1/2
bit.ly/3M5weun —on the brain endocast of a close pterosaur cousin & what it means for pterosaur brain evolution...maybe different from bird brain evolution. 1/2
Reposted by Griffin Lab
The Nishikawa lab at Northern Arizona University and the NSF-funded Integrative Movement Sciences Institute are hiring a postdoc to help develop multiscale muscle models - please apply and share widely! careers.nau.edu/cw/en-us/job...
Postdoctoral Scholar - Flagstaff, Arizona, United States
Special Information
This position is an on-site position which requires the incumbent to complete their work primarily at an NAU site, campus, or facility with or without accommodation. Opportunities...
careers.nau.edu
November 20, 2025 at 11:11 PM
The Nishikawa lab at Northern Arizona University and the NSF-funded Integrative Movement Sciences Institute are hiring a postdoc to help develop multiscale muscle models - please apply and share widely! careers.nau.edu/cw/en-us/job...
Innovative and interesting work here by @caleb-m-gordon.bsky.social, so happy to be part of it!
Hey everyone! I’m excited to share that one of my thesis projects was just published in @currentbiology.bsky.social and featured on phys.org! In this paper, we use an old statistical approach developed by the US Navy in WW2 to predict the aquatic habits of various dinosaurs and marine reptiles 🦖🐊
November 20, 2025 at 9:28 PM
Innovative and interesting work here by @caleb-m-gordon.bsky.social, so happy to be part of it!
Reposted by Griffin Lab
New IJDB issue! Our cover image features an immunostaining of neural crest cells and their derivatives in an Mllt1 E10.5 murine embryo from the paper by Zinck et al doi.org/10.1387/ijdb... Congratulations to the team of @aineurolab.bsky.social for their outstanding contribution!
November 19, 2025 at 4:45 PM
New IJDB issue! Our cover image features an immunostaining of neural crest cells and their derivatives in an Mllt1 E10.5 murine embryo from the paper by Zinck et al doi.org/10.1387/ijdb... Congratulations to the team of @aineurolab.bsky.social for their outstanding contribution!
Reposted by Griffin Lab
Join us in Sheffield! We are keen to support early career researchers in applying for independent research fellowships (IRFs) to join our friendly and collaborative environment, in areas related to developmental biology, stem cells and regenerative biology, and neuroscience.
November 12, 2025 at 10:16 AM
Join us in Sheffield! We are keen to support early career researchers in applying for independent research fellowships (IRFs) to join our friendly and collaborative environment, in areas related to developmental biology, stem cells and regenerative biology, and neuroscience.
Reposted by Griffin Lab
Our big squamate origins and early evolution review is now fully published as open access! with @marcanthonytollis.bsky.social and F. Burbrink
www.annualreviews.org/content/jour...
www.annualreviews.org/content/jour...
Origin and Early Evolution of Squamates and Their Kin: From Fossils to Genomes
Squamates (lizards, including snakes) are the most diverse group of terrestrial vertebrates on Earth today and have an evolutionary history dating back to at least the Middle Triassic (ca. 242 Mya). D...
www.annualreviews.org
November 7, 2025 at 1:48 PM
Our big squamate origins and early evolution review is now fully published as open access! with @marcanthonytollis.bsky.social and F. Burbrink
www.annualreviews.org/content/jour...
www.annualreviews.org/content/jour...
Reposted by Griffin Lab
Flashback #FluorescenceFriday to some of the first light-sheet imaging we were doing. Video shows the collecting duct system of the developing kidney labeled with a pan-cytokeratin antibody. Courtesy of former talented technician Deanna Hardesty.
November 7, 2025 at 4:43 PM
Flashback #FluorescenceFriday to some of the first light-sheet imaging we were doing. Video shows the collecting duct system of the developing kidney labeled with a pan-cytokeratin antibody. Courtesy of former talented technician Deanna Hardesty.
Had a wonderful visit from collaborator Tatsuya Hirasawa from the U of Tokyo! We’ve been awarded a joint Princeton-Tokyo grant to exchange exciting new techniques in vertebrate evo-devo. Our visit to Japan will happen in March!
October 28, 2025 at 11:16 PM
Had a wonderful visit from collaborator Tatsuya Hirasawa from the U of Tokyo! We’ve been awarded a joint Princeton-Tokyo grant to exchange exciting new techniques in vertebrate evo-devo. Our visit to Japan will happen in March!
Opening a field jacket in the new prep lab! Preparator Jack Wilson will work his way through the matrix to the croc skull hiding inside
October 20, 2025 at 9:54 PM
Opening a field jacket in the new prep lab! Preparator Jack Wilson will work his way through the matrix to the croc skull hiding inside
Reposted by Griffin Lab
‼️‼️Triassic Life just opened @smnstuttgart.bsky.social‼️‼️
For all #Triassic fans, lovers of strange reptiles and the Dawn of the Modern World, this is an absolute MUST!
It also couldn't be more timely with our recent publication @nature.com of the wonder reptile #Mirasaura, which is now on display!
For all #Triassic fans, lovers of strange reptiles and the Dawn of the Modern World, this is an absolute MUST!
It also couldn't be more timely with our recent publication @nature.com of the wonder reptile #Mirasaura, which is now on display!
October 18, 2025 at 9:13 AM
‼️‼️Triassic Life just opened @smnstuttgart.bsky.social‼️‼️
For all #Triassic fans, lovers of strange reptiles and the Dawn of the Modern World, this is an absolute MUST!
It also couldn't be more timely with our recent publication @nature.com of the wonder reptile #Mirasaura, which is now on display!
For all #Triassic fans, lovers of strange reptiles and the Dawn of the Modern World, this is an absolute MUST!
It also couldn't be more timely with our recent publication @nature.com of the wonder reptile #Mirasaura, which is now on display!
Reposted by Griffin Lab
Issue 19 is complete!
On the cover: Mouse E10.5 embryo stained for Sox9 (cyan), alpha-tubulin (yellow), and endomucin (magenta). Acquired by Nicole Roos & Anthony Wokasch and chosen by popular vote from the Node’s 2025 MBL Embryology course image competition.
thenode.biologists.com/results-from...
On the cover: Mouse E10.5 embryo stained for Sox9 (cyan), alpha-tubulin (yellow), and endomucin (magenta). Acquired by Nicole Roos & Anthony Wokasch and chosen by popular vote from the Node’s 2025 MBL Embryology course image competition.
thenode.biologists.com/results-from...
October 16, 2025 at 2:41 PM
Issue 19 is complete!
On the cover: Mouse E10.5 embryo stained for Sox9 (cyan), alpha-tubulin (yellow), and endomucin (magenta). Acquired by Nicole Roos & Anthony Wokasch and chosen by popular vote from the Node’s 2025 MBL Embryology course image competition.
thenode.biologists.com/results-from...
On the cover: Mouse E10.5 embryo stained for Sox9 (cyan), alpha-tubulin (yellow), and endomucin (magenta). Acquired by Nicole Roos & Anthony Wokasch and chosen by popular vote from the Node’s 2025 MBL Embryology course image competition.
thenode.biologists.com/results-from...
Reposted by Griffin Lab
Interested in fossils? Brains? Reptiles?
Want to study how reptile (particularly squamate) brains and senses changed over time?
Want to be part of an international team studying the evolution of cognition?
Then apply for our Univ of Edinburgh PhD project!
e5-dtp.ed.ac.uk/project?item...
Want to study how reptile (particularly squamate) brains and senses changed over time?
Want to be part of an international team studying the evolution of cognition?
Then apply for our Univ of Edinburgh PhD project!
e5-dtp.ed.ac.uk/project?item...
Project | E5 Doctoral Training Partnership | E5 Doctoral Training Partnership
The project advertisement
e5-dtp.ed.ac.uk
October 16, 2025 at 11:11 AM
Interested in fossils? Brains? Reptiles?
Want to study how reptile (particularly squamate) brains and senses changed over time?
Want to be part of an international team studying the evolution of cognition?
Then apply for our Univ of Edinburgh PhD project!
e5-dtp.ed.ac.uk/project?item...
Want to study how reptile (particularly squamate) brains and senses changed over time?
Want to be part of an international team studying the evolution of cognition?
Then apply for our Univ of Edinburgh PhD project!
e5-dtp.ed.ac.uk/project?item...
Reposted by Griffin Lab
Hechenleitner, E.M., Martinelli, A.G., Rocher, S. et al. A long-necked early dinosaur from a newly discovered Upper Triassic basin in the Andes. Nature (2025). doi.org/10.1038/s415...
A long-necked early dinosaur from a newly discovered Upper Triassic basin in the Andes - Nature
Discovery of a nearly complete skeleton of Huayracursor jaguensis, a Carnian dinosaur from the Northern Precordillera Basin in northwestern Argentina provides evidence of increased body size and early...
doi.org
October 15, 2025 at 4:39 PM
Hechenleitner, E.M., Martinelli, A.G., Rocher, S. et al. A long-necked early dinosaur from a newly discovered Upper Triassic basin in the Andes. Nature (2025). doi.org/10.1038/s415...
Reposted by Griffin Lab
"...regional extinction rate of between 75 and 84% for squamates in the Western Interior of North America and suggests this group was more severely impacted across the K/Pg boundary than other small-bodied vertebrates."
royalsocietypublishing.org/doi/10.1098/...
🧪 ⚒️ #Paleobio #EvoBio #Geology
royalsocietypublishing.org/doi/10.1098/...
🧪 ⚒️ #Paleobio #EvoBio #Geology
October 10, 2025 at 11:30 PM
"...regional extinction rate of between 75 and 84% for squamates in the Western Interior of North America and suggests this group was more severely impacted across the K/Pg boundary than other small-bodied vertebrates."
royalsocietypublishing.org/doi/10.1098/...
🧪 ⚒️ #Paleobio #EvoBio #Geology
royalsocietypublishing.org/doi/10.1098/...
🧪 ⚒️ #Paleobio #EvoBio #Geology
Reposted by Griffin Lab
Proud to share a new piece in Scientific American co-authored with the brilliant @lnwilson.bsky.social , edited by @katewong.bsky.social, and featuring this spectacular depiction of the endless daylight of the Cretaceous summer in Alaska by Chase Stone!
www.scientificamerican.com/article/how-...
www.scientificamerican.com/article/how-...
Bird Migration Is One of Nature’s Greatest Spectacles. Paleontologists Just Found Clues to Its Origin
Tiny fossils hint at when birds began making their mind-blowing journey to the Arctic to breed
www.scientificamerican.com
October 8, 2025 at 4:04 PM
Proud to share a new piece in Scientific American co-authored with the brilliant @lnwilson.bsky.social , edited by @katewong.bsky.social, and featuring this spectacular depiction of the endless daylight of the Cretaceous summer in Alaska by Chase Stone!
www.scientificamerican.com/article/how-...
www.scientificamerican.com/article/how-...
Reposted by Griffin Lab
🚨 ‘Earth system engineers’ and the cumulative impact of organisms in deep time
sciencedirect.com/science/arti...
Honored to be among the long author list of this new paper out now in @cp-trendsecolevo.bsky.social that looks to bridge the ecosystem engineering and paleontological literature.
sciencedirect.com/science/arti...
Honored to be among the long author list of this new paper out now in @cp-trendsecolevo.bsky.social that looks to bridge the ecosystem engineering and paleontological literature.
September 23, 2025 at 7:57 PM
🚨 ‘Earth system engineers’ and the cumulative impact of organisms in deep time
sciencedirect.com/science/arti...
Honored to be among the long author list of this new paper out now in @cp-trendsecolevo.bsky.social that looks to bridge the ecosystem engineering and paleontological literature.
sciencedirect.com/science/arti...
Honored to be among the long author list of this new paper out now in @cp-trendsecolevo.bsky.social that looks to bridge the ecosystem engineering and paleontological literature.
Had a great visit at Oklahoma State, thanks @fmachado.bsky.social for the invite and for all your hospitality!
September 13, 2025 at 6:31 PM
Had a great visit at Oklahoma State, thanks @fmachado.bsky.social for the invite and for all your hospitality!
Reposted by Griffin Lab
Happy to share the advance version of our big AREES review on squamate origin and early evolution: From Fossils to Genomes with my two amazing colleagues, Frank Burbrink and @marcanthonytollis.bsky.social
www.annualreviews.org/content/jour...
www.annualreviews.org/content/jour...
Origin and Early Evolution of Squamates and Their Kin: From Fossils to Genomes | Annual Reviews
Squamates (lizards, including snakes) are the most diverse group of terrestrial vertebrates on Earth today and have an evolutionary history dating back to at least the Middle Triassic (ca. 242 Mya). D...
www.annualreviews.org
September 7, 2025 at 12:48 AM
Happy to share the advance version of our big AREES review on squamate origin and early evolution: From Fossils to Genomes with my two amazing colleagues, Frank Burbrink and @marcanthonytollis.bsky.social
www.annualreviews.org/content/jour...
www.annualreviews.org/content/jour...
If you’re interested in exploring function in vertebrates, there will be no better place than Armita’s group!
I'm recruiting a PhD student to join the lab at @gtsciences.bsky.social in Fall 2026! Broad taxonomic and topical freedom under the umbrella of vertebrate joint form and function. Information here: www.manafzadeh.com – please share 🦴🩻
✨Some news✨: after finishing my postdoc, I’ll be starting my lab as an Assistant Professor at Georgia Tech. Join us in Atlanta to study how joints work and where they come from!
September 2, 2025 at 4:15 PM
If you’re interested in exploring function in vertebrates, there will be no better place than Armita’s group!