Justin (정환)
@justinan74.bsky.social
geology undergraduate paleo maniac from British Columbia
currently working on a Northumberland Formation project @ my blog https://notesofbonestodustoff.wordpress.com/
Twitter: @justin_an74
currently working on a Northumberland Formation project @ my blog https://notesofbonestodustoff.wordpress.com/
Twitter: @justin_an74
A few years ago, I started my personal project on the Upper Cretaceous Northumberland Formation of British Columbia, and I know proper background has been a long time coming. So here's a blogpost explaining what it's about, how and why I started it, and my future plans
Link in reply ⬇️
Link in reply ⬇️
October 23, 2025 at 7:05 PM
A few years ago, I started my personal project on the Upper Cretaceous Northumberland Formation of British Columbia, and I know proper background has been a long time coming. So here's a blogpost explaining what it's about, how and why I started it, and my future plans
Link in reply ⬇️
Link in reply ⬇️
Some other animals in the vicinity; the crows are so big, practically like ravens! There were also a lot of large hawk-like birds soaring around (apparently black-eared kites, according to a blogger who visited the place before)
June 1, 2025 at 10:46 PM
Some other animals in the vicinity; the crows are so big, practically like ravens! There were also a lot of large hawk-like birds soaring around (apparently black-eared kites, according to a blogger who visited the place before)
I’m not exactly a spider buff, so I only learnt of this species after I looked it up
Still, very glad I got to make this cool observation
Still, very glad I got to make this cool observation
June 1, 2025 at 10:46 PM
I’m not exactly a spider buff, so I only learnt of this species after I looked it up
Still, very glad I got to make this cool observation
Still, very glad I got to make this cool observation
I took a longer video beforehand where it actively tried to intercept the ants, and even lunged at one point, but it kinda chickened out for 15 minutes after that, as in the video above
It eventually disappeared though, so I do think it may have caught one
It eventually disappeared though, so I do think it may have caught one
June 1, 2025 at 10:46 PM
I took a longer video beforehand where it actively tried to intercept the ants, and even lunged at one point, but it kinda chickened out for 15 minutes after that, as in the video above
It eventually disappeared though, so I do think it may have caught one
It eventually disappeared though, so I do think it may have caught one
Saw a Siler cupreus male(?) in Japan yesterday! It was raising its front legs and shaking its abdomen, so I assumed it was doing a display at the ants at first, but this myrmectophagous species may have been trying to hunt them instead
June 1, 2025 at 10:46 PM
Saw a Siler cupreus male(?) in Japan yesterday! It was raising its front legs and shaking its abdomen, so I assumed it was doing a display at the ants at first, but this myrmectophagous species may have been trying to hunt them instead
@echinoblog.bsky.social very intriguing Late Cretaceous echinoderm fossil from Vancouver Island (not mine) posted in a local paleontology Facebook group (www.facebook.com/groups/nanai...)
Any thoughts?
Any thoughts?
April 13, 2025 at 6:06 AM
@echinoblog.bsky.social very intriguing Late Cretaceous echinoderm fossil from Vancouver Island (not mine) posted in a local paleontology Facebook group (www.facebook.com/groups/nanai...)
Any thoughts?
Any thoughts?
My first blogpost in over a year is now out! The famous Greenland shark has its own little counterparts in the genus Rhinoscymnus, and among their first records is R. clarki from the Late Cretaceous Northumberland Fm.
How much do we know about them? Check the link in replies ⬇️
#paleoart #sciart
How much do we know about them? Check the link in replies ⬇️
#paleoart #sciart
March 17, 2025 at 5:30 PM
While it may look like a squid, Enchoteuthis is more at home in #OCTOtober, as its closest living relatives are octopuses
While most common in the Late Cretaceous Western Interior Seaway, this specimen shows that the genus also lived in the Pacific, and it has even been found in Australia!
#SciArt 🐡
While most common in the Late Cretaceous Western Interior Seaway, this specimen shows that the genus also lived in the Pacific, and it has even been found in Australia!
#SciArt 🐡
October 17, 2023 at 6:40 PM
While it may look like a squid, Enchoteuthis is more at home in #OCTOtober, as its closest living relatives are octopuses
While most common in the Late Cretaceous Western Interior Seaway, this specimen shows that the genus also lived in the Pacific, and it has even been found in Australia!
#SciArt 🐡
While most common in the Late Cretaceous Western Interior Seaway, this specimen shows that the genus also lived in the Pacific, and it has even been found in Australia!
#SciArt 🐡
and to boot, it also lived with a large ~8 m long mosasaur (Konishi et al. 2012) (silhouette from GetAwayTrike's Prognathodon overtoni skeletal)
Want to read more about this giant frilled shark, as well as its close relatives? I have just the blogpost for that, linked in the replies
Want to read more about this giant frilled shark, as well as its close relatives? I have just the blogpost for that, linked in the replies
October 6, 2023 at 6:44 PM
and to boot, it also lived with a large ~8 m long mosasaur (Konishi et al. 2012) (silhouette from GetAwayTrike's Prognathodon overtoni skeletal)
Want to read more about this giant frilled shark, as well as its close relatives? I have just the blogpost for that, linked in the replies
Want to read more about this giant frilled shark, as well as its close relatives? I have just the blogpost for that, linked in the replies
For #FossilFriday, here's the largest known frilled shark: a giant Proteothrinax specimen from the Late Cretaceous (Maastrichtian) of Japan
Although the exact measurements are tentative, it appears to have reached lengths of ~7 m, making it one of the largest squalomorphs ever
Although the exact measurements are tentative, it appears to have reached lengths of ~7 m, making it one of the largest squalomorphs ever
October 6, 2023 at 6:42 PM
For #FossilFriday, here's the largest known frilled shark: a giant Proteothrinax specimen from the Late Cretaceous (Maastrichtian) of Japan
Although the exact measurements are tentative, it appears to have reached lengths of ~7 m, making it one of the largest squalomorphs ever
Although the exact measurements are tentative, it appears to have reached lengths of ~7 m, making it one of the largest squalomorphs ever
For #SundayFishSketch, here's my reconstruction of the giant frilled shark Proteothrinax goliath from the Late Cretaceous (Campanian, ~72 ma) of Angola; one of the largest chlamydoselachids, but not *the* largest...
Check out my blogpost to learn more about these sharks! Link in the replies
Check out my blogpost to learn more about these sharks! Link in the replies
October 1, 2023 at 8:24 PM
For #SundayFishSketch, here's my reconstruction of the giant frilled shark Proteothrinax goliath from the Late Cretaceous (Campanian, ~72 ma) of Angola; one of the largest chlamydoselachids, but not *the* largest...
Check out my blogpost to learn more about these sharks! Link in the replies
Check out my blogpost to learn more about these sharks! Link in the replies
I've been doing a lot of reading on Late Cretaceous squalids recently, and while I've found out that their taxonomy is absolutely horrendous, I've also figured out what the largest known taxa are, compiled into this size chart
#sciart #paleoart
#sciart #paleoart
September 17, 2023 at 6:53 PM
I've been doing a lot of reading on Late Cretaceous squalids recently, and while I've found out that their taxonomy is absolutely horrendous, I've also figured out what the largest known taxa are, compiled into this size chart
#sciart #paleoart
#sciart #paleoart
Interestingly, I'm not the first person to attempt an in vivo reconstruction of Centrosqualus primaevus! That credit goes to Signeux (1950), although the dorsal fins are way off on this one
Still, quite the distinction to have a reconstruction from so long ago
Still, quite the distinction to have a reconstruction from so long ago
August 25, 2023 at 7:05 PM
Interestingly, I'm not the first person to attempt an in vivo reconstruction of Centrosqualus primaevus! That credit goes to Signeux (1950), although the dorsal fins are way off on this one
Still, quite the distinction to have a reconstruction from so long ago
Still, quite the distinction to have a reconstruction from so long ago
It is known from numerous articulated skeletons with superb preservation, but the papers on this taxon are old and scant in description and figures, creating challenges in making this reconstruction
August 25, 2023 at 7:00 PM
It is known from numerous articulated skeletons with superb preservation, but the papers on this taxon are old and scant in description and figures, creating challenges in making this reconstruction
Just finished a new reconstruction of the very tiny fossil squalid Centrosqualus primaevus from the Santonian of Lebanon
It is the smallest known dogfish, with the largest skeletons measuring under 30 cm in length
#paleoart
It is the smallest known dogfish, with the largest skeletons measuring under 30 cm in length
#paleoart
August 25, 2023 at 6:57 PM
Just finished a new reconstruction of the very tiny fossil squalid Centrosqualus primaevus from the Santonian of Lebanon
It is the smallest known dogfish, with the largest skeletons measuring under 30 cm in length
#paleoart
It is the smallest known dogfish, with the largest skeletons measuring under 30 cm in length
#paleoart
Going back to my older blogpost about Echinorhinus, the bramble shark, to make some fixes, including some changes to my reconstruction of the Northumberland fossil species
Link in replies ⬇️
#SciArt
Link in replies ⬇️
#SciArt
August 3, 2023 at 6:49 PM
Going back to my older blogpost about Echinorhinus, the bramble shark, to make some fixes, including some changes to my reconstruction of the Northumberland fossil species
Link in replies ⬇️
#SciArt
Link in replies ⬇️
#SciArt
Frilled sharks are one of many oddballs of the deep today, but did you know that they have giant fossil relatives? Proteothrinax is among them, and some of its species grew to truly enormous sizes...
Want to know more? Check my blogpost on them, linked in the replies!
#SciArt #paleoart
Want to know more? Check my blogpost on them, linked in the replies!
#SciArt #paleoart
August 1, 2023 at 7:04 PM
Frilled sharks are one of many oddballs of the deep today, but did you know that they have giant fossil relatives? Proteothrinax is among them, and some of its species grew to truly enormous sizes...
Want to know more? Check my blogpost on them, linked in the replies!
#SciArt #paleoart
Want to know more? Check my blogpost on them, linked in the replies!
#SciArt #paleoart
i'm Justin, a B.C. university student greatly interested in the natural world, especially Mesozoic paleontology and marine bio
i'm currently working on a Northumberland Fm. project, the progress of which you can view at my blog: https://notesofbonestodustoff.wordpress.com/
i'm currently working on a Northumberland Fm. project, the progress of which you can view at my blog: https://notesofbonestodustoff.wordpress.com/
August 1, 2023 at 6:07 PM
i'm Justin, a B.C. university student greatly interested in the natural world, especially Mesozoic paleontology and marine bio
i'm currently working on a Northumberland Fm. project, the progress of which you can view at my blog: https://notesofbonestodustoff.wordpress.com/
i'm currently working on a Northumberland Fm. project, the progress of which you can view at my blog: https://notesofbonestodustoff.wordpress.com/