Dr. Jaimi Gray
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jaimiagray.bsky.social
Dr. Jaimi Gray
@jaimiagray.bsky.social
1.8K followers 1.8K following 190 posts
Aussie Research Scientist at UTCT (UT Austin) | CT scanning | diceCT | morphology | evolution | she/her

graysvertebrateanatomy.com
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jaimiagray.bsky.social
When you visit Friday Harbor Labs, @fishguy.bsky.social always has cool fish to discuss 🐟 Last week we pondered the horned searobin (Bellator militaris), & what its spines could be for. CT scan available on MorphoSource for you to explore
www.morphosource.org/media/000027546
Images made in 3D Slicer
Colored rendering of a CT scan of Bellator militaris, in anterior and anterolateral view Colored rendering of a CT scan of Bellator militaris, in dorsal, left lateral, and ventral views
October 13, 2025 at 5:41 PM
jaimiagray.bsky.social
"What makes us human, I think, is an ability to ask questions, a consequence of our sophisticated spoken language" - J. Goodall.

This #oVertTCN chimpanzee CT scan is available for exploration on MorphoSource: www.morphosource.org/concern/medi...
3D rendering of a whole body CT scan of a chimpanzee, showing the skeleton with a density map where yellow = most dense material, blue = medium density material, purple = low density material. Top shows 3 images of the whole body rendered in a series rotating from front to back. Bottom shows a close up of the head and shoulders. The "oVert" symbol is in the top right corner. In the bottom left corner it reads "Pan troglodytes; YPM:VZ:015959; MorphoSource ID: 0000058004"
October 3, 2025 at 3:14 PM
jaimiagray.bsky.social
Meet the newest species of Brazilian flea-toad 🐸 Brachycephalus nanicus! 🐸

B. nanicus is <1cm long & dwells under the leaf litter in the cloud forests of Serro do Mar, southeastern Brazil

I CT scanned this specimen for the osteological description

Out today in Zootaxa: mapress.com/zt/article/v...
3D rendering of a CT scan of Brachycephalus nanicus, with the skeleton rendered in light brown and skin rendered in transparent purple. Top = dorsal view, bottom = ventral view. In the bottom right corner there is an image of the frog (a small brown frog) sitting on a coin. 3D renderings of the skeleton of Brachycephalus nanicus, rendered in light brown. Top left = whole skeleton in dorsal (left) and ventral (right) views. Top right = skull in dorsal (left), ventral (middle), and right lateral (right) views. Bottom from left to right, 3D renderings of the hand, foot, spinal column, and should girdle (top) / pelvic girdle (right lateral).
September 9, 2025 at 5:28 PM
jaimiagray.bsky.social
They are also called shingleback/bobtail/two-headed skink/pinecone lizard/stumpy lizard, and more. They're heavily armoured, with a peaceful demeanor (but can be a sassy when bothered). They tend to pair up & stay with the same mate year after year, & you can often find pairs hanging out together ❤️
Two sleepy lizards side by side, photographed on the side of a rural road in South Australia. A sleepy lizard standing peacefully in the sun, facing the camera A sleepy lizard facing the camera with it's mouth open and tongue out.
August 14, 2025 at 5:08 PM
jaimiagray.bsky.social
Hey it's #WorldLizardDay 🦎
Here's one of my faves & one I saw *a lot* of growing up in rural Australia. Tiliqua rugosa has many common names, but where I'm from we call them "sleepy lizard" or "stumpy tail".

Download the #oVertTCN CT scan from MorphoSource here: www.morphosource.org/concern/medi...
A 3D rendering of a CT scan of Tiliqua rugosa, facing the front (top) and facing the back (bottom), rendered in yellow (most dense parts), pink (medium density parts), and blue (least dense parts). A 3D rendering of a CT scan of the head Tiliqua rugosa, in dorsal view (top) and ventral view (bottom), rendered in yellow (most dense parts), pink (medium density parts), and blue (least dense parts).
August 14, 2025 at 5:08 PM
jaimiagray.bsky.social
I got my hands on this @floridamuseum.bsky.social specimen freshly fixed in 2021, & created skeletal & soft tissue CT scans. You can download them here (including colored skull model): www.morphosource.org/concern/biological_specimens/000408235

View the exploding skull model here: skfb.ly/pzUFC
August 11, 2025 at 7:13 PM
jaimiagray.bsky.social
Climbing into my #ColorsOfSkullAnatomy collection: a veiled chameleon (Chamaeleo calyptratus) 🦎 this large male was getting up there in age when he was collected, as shown by his worn down teeth and bone pathologies.

Find the model here:
www.graysvertebrateanatomy.com/veiled-chame...
Image of a 3D model of a veiled chameleon skull, with bones colored to demonstrate skull anatomy, on a black background. Model is shown in lateral (top), antero-lateral (middle), and anterior (bottom) views. A small image of the whole museum specimen is shown with a scale bar in the bottom right corner.
August 11, 2025 at 7:13 PM
jaimiagray.bsky.social
It appears that these aquatic caecilians are doing pretty well down there and definitely reproducing in Miami, with a whopping 115 individuals collected using cans of chicken vienna sausages 🌭
top left - front page of the PDF of the paper entitled " Establishment of Aquatic Rio Cauca Caecilians, Typhlonectes natans (Fischer 1880) (Gymnophiona: Typhlonectidae), in Florida, with Notes of their Relative Abundance, Distribution, and Natural History. Top right - a 3D rendering of a CT scan of a caecilian, with bone colored skeleton and transparent body, with fish bones inside (rendered in blue) and radiodense digested food (rendered in yellow). Bottom - photograph of a live Rio Cauca Caecilian.
July 26, 2025 at 11:12 PM
jaimiagray.bsky.social
I had so much fun being part of this project! On my scheduled scanning days @ UF Coleman would hand me a bucket of caecilians collected from the Tamiami canal. I put each under the X ray beam to look for babies or interesting food items. If I saw anything of interest, I CT scanned them.
A 3d rendering of a CT scan of two Rio Cauca caecilian with transparent body and bone colored skeleton, showing baby caecilians inside, each rendered in a different color. There are three baby caecilians in the top individual, rendered in green, pink, and purple, and one baby caecilian (rendered in blue) plus one unidentified object (rendered in yellow) in the second individual.
July 26, 2025 at 11:12 PM
jaimiagray.bsky.social
Say hello to Florida's newest established species, Typhlonectes natans - the Rio Cauca Caecilian! You can read about their relative abundance, distribution, & natural history, in our brand new paper:

journals.ku.edu/reptilesanda...

Here is one individual I CT scanned that had 7 babies inside!
A 3d rendering of a CT scan of a Rio Cauca caecilian with transparent body and bone colored skeleton, showing 7 baby caecilians inside, each rendered in a different color - counter-clockwise from tail to head - red, orange, yellow, green, light blue, dark blue, purple.
July 26, 2025 at 11:12 PM
jaimiagray.bsky.social
It's #WorldSnakeDay so here is a green tree python I CT scanned for #oVertTCN 🐍

Get the datasets (both #diceCT and regular CT) on MorphoSource: www.morphosource.org/concern/biol...

💚💚💚
3D rendering of a diceCT scan of a coiled green tree python, rendered in bright green. Slightly overlapping is a 3D rendering of the python's skeleton, rendered in a light brown color.
July 16, 2025 at 9:04 PM
jaimiagray.bsky.social
Catch me at 10.30am in the Science in 3D #ASIHin3D symposium at #JMIH25 today! Amphibians 🐸 Reptiles 🦎 CT scanning ☢️ Iodine 🧪 Anatomy 🧠
Display slide that reads "Joint meeting of Ichthyologists and Herpetologists Saturday July 12, 2025 / 10.30am - 10.45 Session with big attendance '28.1 | the Diffusion Diaries: using Diffusible Iodine-Based Contrast-Enhanced...' Jaimi Gray"
July 12, 2025 at 1:42 PM
jaimiagray.bsky.social
#ASIHin3D begins! An absolute banger line up of speakers today (including me @ 10.30). LET'S GO 🥳 #JMIH25
Picture of a powerpoint slide that reads "Science in 3D"
July 12, 2025 at 1:32 PM
jaimiagray.bsky.social
En route to the Twin Cities MN for #JMIH2025 ✈️ I'm bringing plenty of stickers for y'all so you have an excuse to hit me up and talk fish and herps 🐟🐢🐠🐡🐸🦎🐍🐊

Catch my talk in the #ASIHin3D symposium on Saturday...
A coffee cup sitting on a table at an airport. Next to the coffee cup lies a pile of colorful stickers showcasing 3D renderings of CT scans
July 9, 2025 at 10:16 AM
jaimiagray.bsky.social
You can buy models like this online, but they are pricey (100s of $ each or >$1000 a set). I made these using NSF funded *free* data (from the oVert project), a few bucks worth of PLA filament, and sandpaper & paint (a combo of automotive and acrylics).
June 26, 2025 at 3:56 PM
jaimiagray.bsky.social
I used my 3D printer to create educational anatomical models of the brains of fish, frog, & lizard 🐟🐸🦎 The (color-blind friendly) colors demonstrate anatomical regions, and the 🧠 are many times larger than their real size. They can be removed from their stands for closer examination/comparison 🧪
Top: black and white 3D rendering of a dusky basslet fish Bottom left: purple/pink 3D rendering of the brain of the fish, with a scale bar representing 0.5 mm Bottom right: A photograph of a 3D printed and painted anatomical model of the fish brain on a white stand, with colors demonstrating anatomical regions. Top: black and white 3D rendering of a midwife toad Bottom left: purple/pink 3D rendering of the brain of the frog, with a scale bar representing 1 mm Bottom right: A photograph of a 3D printed and painted anatomical model of the frog brain on a white stand, with colors demonstrating anatomical regions. Top: black and white 3D rendering of a plated lizard Bottom left: purple/pink 3D rendering of the brain of the lizard, with a scale bar representing 3 mm Bottom right: A photograph of a 3D printed and painted anatomical model of the lizard brain on a white stand, with colors demonstrating anatomical regions.
June 26, 2025 at 3:56 PM
jaimiagray.bsky.social
Who are those sweet slippery noodles with tiny eyes? Caecilians of course! 🥰 I imaged these limbless amphibs for #oVertTCN using #diceCT to enhance the contrast of the soft tissues. You can find the datasets on MorphoSource with the other diceCT amphibians: www.morphosource.org/projects/000... 🧪
Seven 3D renderings of caecilians (limbless amphibians) arranged on a balck background. Each is rendered in a different color, from left to right and top to bottom: red, teal, electric blue, purple, green, orange, yellow.
June 20, 2025 at 2:26 PM
jaimiagray.bsky.social
I also urge you to check out the re-vamped MorphoSource online 3D viewer! The team has been working on new features for it, including the ability to save annotations, take measurements, new navigation controls, & camera settings. You may not even need to download models to collect data you need!
Screenshot of the media page on MorphSource, showing specimen/media details on the left, and 3D viewer with controls on the right. A colored 3D model of a gopher tortoise skeleton is shown in the 3D viewer.
June 13, 2025 at 3:51 PM
jaimiagray.bsky.social
Can we just take a moment to appreciate turtle skeletons? 🐢🦴🤯 The original model of this gopher tortoise skeleton on Sketchfab (skfb.ly/ooVZS) is a crowd favorite & I've received requests for a downloadable version lately, so I uploaded a new one to MorphoSource: www.morphosource.org/concern/medi...
image with black background, showing a colored 3D model of a gopher tortoise with bisected shell and transparent right side, revealing the skeleton inside. Shown in anterior (top), anterolateral (middle), and right lateral (bottom) views. An image of the museum specimen on a white background, with scale bar, is shown in the top left corner.
June 13, 2025 at 3:51 PM
jaimiagray.bsky.social
Decided there's not enough lizards in the #ColorsOfSkullAnatomy collection 🦎 So, new to the gang: Phyllurus platurus (southern leaf tail gecko). An Aussie lizard of course, and one of the 1st specimens I scanned at Florida Museum in 2021
www.graysvertebrateanatomy.com/leaftail-gecko-skull-anatomy/
On the left of the image are three different views of a 3D model of the skull of a leaf tail gecko (Phyllurus platurus), with all bones isolated and colored to demonstrate skull anatomy, from top to bottom, anterolateral view, dorsal view, and anterior view. On the right side of the image is a 3D rendering of a contrast enhanced CT scan of the whole body of the specimen, rendered in purple.
June 10, 2025 at 6:16 PM
jaimiagray.bsky.social
Had a marvelous time teaching our UTCT bio/paleo short course this week! 3D Slicer and dragonfly, with a hint of Blender and diceCT... Participants are now equipped to go forth and render/segment/measure/analyze their CT data 🤓
The computer lab at UTCT, with large monitors showing CT data being processed by students. Dave Edey sits at a PC at the front of the room, demonstrating how to use the Dragonfly CT processing software.
June 6, 2025 at 9:55 PM
jaimiagray.bsky.social
Today we welcome our bio/paleo short course participants to UTCT! Three days of CT and data processing, coming right up 💁
Sign that reads "welcome to UTCT bio/paleo short course, Jessie, Dave Romy, Jaimi"
June 2, 2025 at 4:03 PM
jaimiagray.bsky.social
And that's a wrap on our NoCTURN 2025 meeting at the @amnh.org 🎉🎉 I'm brimming with pride at all the things we've been able to achieve! Just the most marvelous community (who knows how to have a good time). Look at all the things we did (much more still to come 😉): nocturnetwork.org
The Non-Clinical Tomography Users Research Network standing all together in the dinosaur hall at the American Museum of Natural History
May 17, 2025 at 2:38 PM
jaimiagray.bsky.social
ToScA attendees were living it UP on our dinner cruise in New York city 🗽🛥️
May 14, 2025 at 9:02 PM
jaimiagray.bsky.social
Got to stand up at the @amnh.org & tell everyone at ToScA about the #oVertTCN project and some of the fun things it led to...
🐒🦌🐀🦜🐸🦎🐊🐢🐦‍⬛🐟🐍🦔
Jaimi Gray presenting on stage behind a podium at the American Museum of Natural History. The slide behind her details the number of genera the oVert project scanned.
May 14, 2025 at 2:31 PM