Kevin Stevens
@neohibolites.bsky.social
Pinned
Kevin Stevens
@neohibolites.bsky.social
· May 27
Biogeography, evolution, and ecology of the ancestral cichlids
This article examines the early evolution and biogeography of cichlids, discussing fossil evidence and the hypotheses regarding their origins. It reviews the debate between Gondwanan vicariance and ma...
cichlidae.com
What do we know about the earliest history of cichlid fishes? Here’s an extended and updated English version of my article on the biogeography and early evolution of cichlids, which I originally published in German in 2020. 🐟 🧪 #cichlid #biogeography #paleontology
cichlidae.com/article.php?...
cichlidae.com/article.php?...
Reposted by Kevin Stevens
So in German, cichlids are called ‚Buntbarsche‘, which literally means ‚colorful perches‘. While they‘re not related to true perches, I guess the ‚colorful‘ part fits quite well. 🐟 #photography #fishkeeping
November 3, 2025 at 5:35 PM
So in German, cichlids are called ‚Buntbarsche‘, which literally means ‚colorful perches‘. While they‘re not related to true perches, I guess the ‚colorful‘ part fits quite well. 🐟 #photography #fishkeeping
Reposted by Kevin Stevens
New paper out on the formation mechanism of cameral deposits in orthoceratoid cephalopds! This topic has been debated for more than 150 years and we now finally have a satisfying solution 🥳
https://doi.org/10.1111/pala.70032
#Palaeontology #cephalopods […]
[Original post on ecoevo.social]
https://doi.org/10.1111/pala.70032
#Palaeontology #cephalopods […]
[Original post on ecoevo.social]
November 8, 2025 at 5:06 PM
Reposted by Kevin Stevens
Lophophorata is monophyletic!
Super excited to see this work out in Current Biology - we sequenced a phoronid genome and used shared chromosome fusions to confirm the monophyly of Lophophorata.
A big team effort from the Luo Lab @yjluo.bsky.social!
More here: authors.elsevier.com/c/1m3mV3QW8S...
Super excited to see this work out in Current Biology - we sequenced a phoronid genome and used shared chromosome fusions to confirm the monophyly of Lophophorata.
A big team effort from the Luo Lab @yjluo.bsky.social!
More here: authors.elsevier.com/c/1m3mV3QW8S...
November 10, 2025 at 2:37 PM
Lophophorata is monophyletic!
Super excited to see this work out in Current Biology - we sequenced a phoronid genome and used shared chromosome fusions to confirm the monophyly of Lophophorata.
A big team effort from the Luo Lab @yjluo.bsky.social!
More here: authors.elsevier.com/c/1m3mV3QW8S...
Super excited to see this work out in Current Biology - we sequenced a phoronid genome and used shared chromosome fusions to confirm the monophyly of Lophophorata.
A big team effort from the Luo Lab @yjluo.bsky.social!
More here: authors.elsevier.com/c/1m3mV3QW8S...
Reposted by Kevin Stevens
#MolluscMonday Balanced on a wall beneath the ice-cream parlour at Aubeterre (Charente, France) is a fossil of the large rudist bivalve Hippurites, probably collected from a local field underlain by Campanian limestones.
November 10, 2025 at 7:30 AM
#MolluscMonday Balanced on a wall beneath the ice-cream parlour at Aubeterre (Charente, France) is a fossil of the large rudist bivalve Hippurites, probably collected from a local field underlain by Campanian limestones.
Reposted by Kevin Stevens
Challenging traditional methods of age estimation: elemental and isotopic characterisation of speartooth shark Glyphis glyphis vertebra www.int-res.com/abstracts/me...
Challenging traditional methods of age estimation: elemental and isotopic characterisation of speartooth shark Glyphis glyphis vertebrae
Chondrichthyan (sharks, rays, and chimaeras) age estimation has mostly been informed through counting bands in calcified hard parts such as vertebrae. However, this method is not broadly...
www.int-res.com
November 9, 2025 at 6:28 PM
Challenging traditional methods of age estimation: elemental and isotopic characterisation of speartooth shark Glyphis glyphis vertebra www.int-res.com/abstracts/me...
Reposted by Kevin Stevens
Microstructural & geochemical evidence offers a solution to the cephalopod cameral deposits riddle onlinelibrary.wiley.com/doi/10.1111/... @datadryad.bsky.social
November 9, 2025 at 3:43 PM
Microstructural & geochemical evidence offers a solution to the cephalopod cameral deposits riddle onlinelibrary.wiley.com/doi/10.1111/... @datadryad.bsky.social
Reposted by Kevin Stevens
everyone, go watch this video of a snail giving birth to 3 adorable babies
I had some of these for a while. Its a trip to watch.
From the snails community on Reddit: One of my Japanese Trapdoor Snails giving birth in July 2019. Thought you guys would enjoy. This is when I learned the mothers briefly clean them right after birth...
Explore this post and more from the snails community
www.reddit.com
November 9, 2025 at 6:40 AM
everyone, go watch this video of a snail giving birth to 3 adorable babies
Reposted by Kevin Stevens
Our paper on tinamou evolution is finally out in @systbiol.bsky.social. academic.oup.com/sysbio/advan...
November 9, 2025 at 4:26 AM
Our paper on tinamou evolution is finally out in @systbiol.bsky.social. academic.oup.com/sysbio/advan...
Reposted by Kevin Stevens
I’m stuck in bed between chemo treatments for metastatic coloncancer, wearing a take-home chemo pump attached to my chest.
I wanted to share my advice that you can benefit from ‘Letting Your Colleagues In’ don’t need to struggle alone
@insidehighered.com
www.insidehighered.com/opinion/care...
I wanted to share my advice that you can benefit from ‘Letting Your Colleagues In’ don’t need to struggle alone
@insidehighered.com
www.insidehighered.com/opinion/care...
Consider Sharing Health Challenges With Colleagues (opinion)
Being open with my colleagues about my cancer diagnosis has allowed me to access an enormous source of support and comfort.
www.insidehighered.com
November 6, 2025 at 3:15 PM
I’m stuck in bed between chemo treatments for metastatic coloncancer, wearing a take-home chemo pump attached to my chest.
I wanted to share my advice that you can benefit from ‘Letting Your Colleagues In’ don’t need to struggle alone
@insidehighered.com
www.insidehighered.com/opinion/care...
I wanted to share my advice that you can benefit from ‘Letting Your Colleagues In’ don’t need to struggle alone
@insidehighered.com
www.insidehighered.com/opinion/care...
Reposted by Kevin Stevens
Years of work and collab with an incredible team at #BBCStudios #AppleTV @framestore.bsky.social ... involving so many camera operators, writers, producers, effects people, artists and others, #PrehistoricPlanetaIceAge is out on #AppleTV Nov 26th. A definitive vision of Ice Age wildlife worldwide.
November 7, 2025 at 3:59 PM
Years of work and collab with an incredible team at #BBCStudios #AppleTV @framestore.bsky.social ... involving so many camera operators, writers, producers, effects people, artists and others, #PrehistoricPlanetaIceAge is out on #AppleTV Nov 26th. A definitive vision of Ice Age wildlife worldwide.
New paper out on the formation mechanism of cameral deposits in orthoceratoid cephalopds! This topic has been debated for more than 150 years and we now finally have a satisfying solution 🥳
https://doi.org/10.1111/pala.70032
#Palaeontology #cephalopods […]
[Original post on ecoevo.social]
https://doi.org/10.1111/pala.70032
#Palaeontology #cephalopods […]
[Original post on ecoevo.social]
November 8, 2025 at 5:06 PM
Reposted by Kevin Stevens
New paper out on the formation mechanism of cameral deposits in orthoceratoid cephalopds! This topic has been debated for more than 150 years and we now finally have a satisfying solution 🥳
https://doi.org/10.1111/pala.70032
#Palaeontology #cephalopods […]
[Original post on ecoevo.social]
https://doi.org/10.1111/pala.70032
#Palaeontology #cephalopods […]
[Original post on ecoevo.social]
November 8, 2025 at 3:20 PM
New paper out on the formation mechanism of cameral deposits in orthoceratoid cephalopds! This topic has been debated for more than 150 years and we now finally have a satisfying solution 🥳
https://doi.org/10.1111/pala.70032
#Palaeontology #cephalopods […]
[Original post on ecoevo.social]
https://doi.org/10.1111/pala.70032
#Palaeontology #cephalopods […]
[Original post on ecoevo.social]
Reposted by Kevin Stevens
No secret that there's a lot of amazing stuff at AMNH. Some of my favorites are these massive chimneys recovered from hydrothermal vents of the Juan de Fuca Ridge, more than a mile beneath the surface of the Pacific Ocean.
November 8, 2025 at 3:38 PM
No secret that there's a lot of amazing stuff at AMNH. Some of my favorites are these massive chimneys recovered from hydrothermal vents of the Juan de Fuca Ridge, more than a mile beneath the surface of the Pacific Ocean.
Reposted by Kevin Stevens
These findings are important to the residents of Bessemer, Alabama impacted by the Marvel Project a mega datacenter that will have a huge environmental impact.
www.biorxiv.org/content/10.1...
The authors discovered that the imperiled Birmingham Darter is distributed in Little Blue Creek. #GreenSky
www.biorxiv.org/content/10.1...
The authors discovered that the imperiled Birmingham Darter is distributed in Little Blue Creek. #GreenSky
November 8, 2025 at 2:26 AM
These findings are important to the residents of Bessemer, Alabama impacted by the Marvel Project a mega datacenter that will have a huge environmental impact.
www.biorxiv.org/content/10.1...
The authors discovered that the imperiled Birmingham Darter is distributed in Little Blue Creek. #GreenSky
www.biorxiv.org/content/10.1...
The authors discovered that the imperiled Birmingham Darter is distributed in Little Blue Creek. #GreenSky
Reposted by Kevin Stevens
Hey hey #FossilFriday . A beautiful Discoscaphites conradi from the Fox Hills Formation (Upper Cretaceous) of South Dakota. Not pictured: on the opposite side is nice partial Sphenodiscus. Personal collection, my own photo.
#ammonite #fossil #geology #paleontology #cretaceous
#ammonite #fossil #geology #paleontology #cretaceous
November 7, 2025 at 8:57 PM
Hey hey #FossilFriday . A beautiful Discoscaphites conradi from the Fox Hills Formation (Upper Cretaceous) of South Dakota. Not pictured: on the opposite side is nice partial Sphenodiscus. Personal collection, my own photo.
#ammonite #fossil #geology #paleontology #cretaceous
#ammonite #fossil #geology #paleontology #cretaceous
Reposted by Kevin Stevens
It's a #GarWeek #FossilFriday! Here's some of the ganoid scales off of gar that we routinely find when scouting in the Hell Creek. So far only 1 complete gar skeleton has been found in the HCF, and I found it a full 10 years before I found my first Tyrannosaurus.
November 7, 2025 at 9:59 PM
It's a #GarWeek #FossilFriday! Here's some of the ganoid scales off of gar that we routinely find when scouting in the Hell Creek. So far only 1 complete gar skeleton has been found in the HCF, and I found it a full 10 years before I found my first Tyrannosaurus.
Reposted by Kevin Stevens
November 6, 2025 at 7:58 PM
Reposted by Kevin Stevens
Eocrinoids and Gogia are some of my favorite echinoderms. They are very early echinoderms with simple arms and short holdfasts.
Gogia spiralis is from the Cambrian upper Wheeler Shale of Utah.
#FossilFriday #SciArt
Gogia spiralis is from the Cambrian upper Wheeler Shale of Utah.
#FossilFriday #SciArt
August 22, 2025 at 6:27 PM
Eocrinoids and Gogia are some of my favorite echinoderms. They are very early echinoderms with simple arms and short holdfasts.
Gogia spiralis is from the Cambrian upper Wheeler Shale of Utah.
#FossilFriday #SciArt
Gogia spiralis is from the Cambrian upper Wheeler Shale of Utah.
#FossilFriday #SciArt
🐟🧪
Using fish teeth fossils from lake sediments, we found the haplochromine cichlids diversified quite rapidly and the entire food web evolved within just the first three millennia after the formation of modern Lake Victoria (which started refilling ~ 17k years ago). www.nature.com/articles/s41...
Fossil evidence for trait diversification in an adaptive radiation - Scientific Reports
Adaptive radiation is an important process for the origin of functional and ecological biodiversity. Understanding how, when, and why adaptive radiations occur is a long-standing interest in evolution...
www.nature.com
November 7, 2025 at 2:09 PM
🐟🧪
Reposted by Kevin Stevens
Using fish teeth fossils from lake sediments, we found the haplochromine cichlids diversified quite rapidly and the entire food web evolved within just the first three millennia after the formation of modern Lake Victoria (which started refilling ~ 17k years ago). www.nature.com/articles/s41...
Fossil evidence for trait diversification in an adaptive radiation - Scientific Reports
Adaptive radiation is an important process for the origin of functional and ecological biodiversity. Understanding how, when, and why adaptive radiations occur is a long-standing interest in evolution...
www.nature.com
November 6, 2025 at 8:05 AM
Using fish teeth fossils from lake sediments, we found the haplochromine cichlids diversified quite rapidly and the entire food web evolved within just the first three millennia after the formation of modern Lake Victoria (which started refilling ~ 17k years ago). www.nature.com/articles/s41...
Reposted by Kevin Stevens
📢 Vienna Institute of Demography @demographyvienna.bsky.social is seeking a Postdoc Researcher in Population Data and Projections RG 📈 📊
I can't recommend enough working at VID, especially with Anne!
💯 friendly, supportive environment with world-class researchers.🤓
oeawnr.onlyfy.jobs/job/km5kybrq
I can't recommend enough working at VID, especially with Anne!
💯 friendly, supportive environment with world-class researchers.🤓
oeawnr.onlyfy.jobs/job/km5kybrq
Postdoc (m/f/x) – Population Data and Projections
OeAW - Discovering the futureAs a central non-university institution for science and research, the Austrian Academy of Sciences - OeAW has the task of "promoting science in every respect". F...
oeawnr.onlyfy.jobs
October 31, 2025 at 8:12 AM
📢 Vienna Institute of Demography @demographyvienna.bsky.social is seeking a Postdoc Researcher in Population Data and Projections RG 📈 📊
I can't recommend enough working at VID, especially with Anne!
💯 friendly, supportive environment with world-class researchers.🤓
oeawnr.onlyfy.jobs/job/km5kybrq
I can't recommend enough working at VID, especially with Anne!
💯 friendly, supportive environment with world-class researchers.🤓
oeawnr.onlyfy.jobs/job/km5kybrq
Reposted by Kevin Stevens
Pothos leaf size with beer bottle size comparison.
#fishkeeping #aquarium #aquascaping #fishtank #pothos
#fishkeeping #aquarium #aquascaping #fishtank #pothos
November 3, 2025 at 9:40 PM
Pothos leaf size with beer bottle size comparison.
#fishkeeping #aquarium #aquascaping #fishtank #pothos
#fishkeeping #aquarium #aquascaping #fishtank #pothos
Reposted by Kevin Stevens
Describing and sampling J/K boundary on cut on SR 191 sw of Blanding lotsof thin section s to come big uppermost Morrison "bauxite" samples from laterite to slab. Ferrugenous paleosols of Yellow Car cool too. Section measured, but lots of work remains. @utahpaleo-ufop.bsky.social
November 3, 2025 at 11:02 PM
Describing and sampling J/K boundary on cut on SR 191 sw of Blanding lotsof thin section s to come big uppermost Morrison "bauxite" samples from laterite to slab. Ferrugenous paleosols of Yellow Car cool too. Section measured, but lots of work remains. @utahpaleo-ufop.bsky.social
Reposted by Kevin Stevens
#BadSegeberg: In den Höhlen des Kalkbergs fangen #Ratten #Fledermäuse aus der Luft. Die Nager können im Ultraschallbereich hören u spüren mit den Vibrissen die Luftbewegung - dann greifen sie zu
www.sciencedirect.com/science/arti...
www.sciencedirect.com/science/arti...
Active predation by brown rats (Rattus norvegicus) on bats at urban mass hibernacula in Northern Germany: Conservation and one health implications
This study is the first to document systematic predation by Rattus norvegicus on bats at urban hibernacula hosting several thousand individuals in Eur…
www.sciencedirect.com
November 4, 2025 at 8:11 AM
#BadSegeberg: In den Höhlen des Kalkbergs fangen #Ratten #Fledermäuse aus der Luft. Die Nager können im Ultraschallbereich hören u spüren mit den Vibrissen die Luftbewegung - dann greifen sie zu
www.sciencedirect.com/science/arti...
www.sciencedirect.com/science/arti...