Alexandre Fonseca
@lexfonseca.bsky.social
🇵🇹 | Geology MSc @ FCUL | Paleontologist | Paleoartist
email: [email protected]
website: lexfonseca.carrd.co
email: [email protected]
website: lexfonseca.carrd.co
Pinned
Alexandre Fonseca
@lexfonseca.bsky.social
· Oct 25
Hello everyone! 🐧
I'm Lex, a paleoartist and paleontology student focusing on sauropod myology and locomotion. I will be sharing art and some thoughts about my interests here, so be sure to follow!
Here's some sauropod art for your viewing convenience!
I'm Lex, a paleoartist and paleontology student focusing on sauropod myology and locomotion. I will be sharing art and some thoughts about my interests here, so be sure to follow!
Here's some sauropod art for your viewing convenience!
Reposted by Alexandre Fonseca
#FossilFriday (well, really "#SubfossilFriday): Skeleton of a female upland moa (Megalapteryx didinus) @OtagoMuseum
November 28, 2025 at 9:33 PM
#FossilFriday (well, really "#SubfossilFriday): Skeleton of a female upland moa (Megalapteryx didinus) @OtagoMuseum
Reposted by Alexandre Fonseca
Re‐evaluation of a soft crested Edmontosaurin, with implications for hadrosaurid life appearance and diversity - Sharpe - The Anatomical Record - Wiley Online Library anatomypubs.onlinelibrary.wiley.com/doi/10.1002/...
Re‐evaluation of a soft crested Edmontosaurin, with implications for hadrosaurid life appearance and diversity
Hadrosaurid dinosaurs are generally regarded as “crested” or “non-crested” depending on the presence or absence of a bony cranial crest. At least one supposedly “non-crested” hadrosaur is known to ha...
anatomypubs.onlinelibrary.wiley.com
November 29, 2025 at 2:19 PM
Re‐evaluation of a soft crested Edmontosaurin, with implications for hadrosaurid life appearance and diversity - Sharpe - The Anatomical Record - Wiley Online Library anatomypubs.onlinelibrary.wiley.com/doi/10.1002/...
Reposted by Alexandre Fonseca
While birds and bats both developed adaptations for flight, the way they went about it is so fundamentally different it affects their possible ecological adaptation. Specifically, birds can easily shift to a walking lifestyle, bats can't. 🧪
Link: www.nature.com/articles/s41...
Link: www.nature.com/articles/s41...
November 29, 2025 at 8:03 AM
While birds and bats both developed adaptations for flight, the way they went about it is so fundamentally different it affects their possible ecological adaptation. Specifically, birds can easily shift to a walking lifestyle, bats can't. 🧪
Link: www.nature.com/articles/s41...
Link: www.nature.com/articles/s41...
Reposted by Alexandre Fonseca
#temnovember2025 day 27: Rewana
And now for the last round of #temnovember and we have #Rewana quadricuneata a #rhytidosteid from the early #triassic of Australia, realally cool for the lack of osification on their vertebra, leathing to them being divided on 6 diferent bones
And now for the last round of #temnovember and we have #Rewana quadricuneata a #rhytidosteid from the early #triassic of Australia, realally cool for the lack of osification on their vertebra, leathing to them being divided on 6 diferent bones
November 27, 2025 at 3:17 PM
#temnovember2025 day 27: Rewana
And now for the last round of #temnovember and we have #Rewana quadricuneata a #rhytidosteid from the early #triassic of Australia, realally cool for the lack of osification on their vertebra, leathing to them being divided on 6 diferent bones
And now for the last round of #temnovember and we have #Rewana quadricuneata a #rhytidosteid from the early #triassic of Australia, realally cool for the lack of osification on their vertebra, leathing to them being divided on 6 diferent bones
Reposted by Alexandre Fonseca
November 28, 2025 at 2:52 AM
Reposted by Alexandre Fonseca
Have you ever seen a baby gar eating?
This little Spotted Gar is about a week old and has started feeding on zooplankton (in this case brine shrimp/Artemia/ aka "sea monkeys").
This little Spotted Gar is about a week old and has started feeding on zooplankton (in this case brine shrimp/Artemia/ aka "sea monkeys").
October 3, 2025 at 2:41 PM
Have you ever seen a baby gar eating?
This little Spotted Gar is about a week old and has started feeding on zooplankton (in this case brine shrimp/Artemia/ aka "sea monkeys").
This little Spotted Gar is about a week old and has started feeding on zooplankton (in this case brine shrimp/Artemia/ aka "sea monkeys").
Reposted by Alexandre Fonseca
Happy Origin Day! Published OTD in 1859
November 24, 2025 at 1:34 PM
Happy Origin Day! Published OTD in 1859
Reposted by Alexandre Fonseca
Bucket list sloth butt selfie!! This beautiful specimen is from Anza Borrego and it has THOUSANDS of in situ osteoderms. There are only two specimens with in situ osteoderms (that I know of) in North America and I’m spending the day with this one.
November 24, 2025 at 6:57 PM
Bucket list sloth butt selfie!! This beautiful specimen is from Anza Borrego and it has THOUSANDS of in situ osteoderms. There are only two specimens with in situ osteoderms (that I know of) in North America and I’m spending the day with this one.
Reposted by Alexandre Fonseca
Today's random piece of nostalgic palaeoart: John Gurche's Tyrannosaurus!
Commissioned to accompany the Field Museum's exhibition of Sue the T.rex, this is among the definitive works of 2000s T.rex artwork. It's a moody piece that makes good use of Gurche's mastery of texture and lighting. (1/6)
Commissioned to accompany the Field Museum's exhibition of Sue the T.rex, this is among the definitive works of 2000s T.rex artwork. It's a moody piece that makes good use of Gurche's mastery of texture and lighting. (1/6)
May 22, 2025 at 7:52 PM
Today's random piece of nostalgic palaeoart: John Gurche's Tyrannosaurus!
Commissioned to accompany the Field Museum's exhibition of Sue the T.rex, this is among the definitive works of 2000s T.rex artwork. It's a moody piece that makes good use of Gurche's mastery of texture and lighting. (1/6)
Commissioned to accompany the Field Museum's exhibition of Sue the T.rex, this is among the definitive works of 2000s T.rex artwork. It's a moody piece that makes good use of Gurche's mastery of texture and lighting. (1/6)
Reposted by Alexandre Fonseca
Em abril a @cienciasulisboa.bsky.social e Instituto Dom Luiz estiveram no XXIII Encuentro de Jóvenes Insvestigadores en Paleontología com @lexfonseca.bsky.social que falou sobre: "Appendicular myological reconstruction of Lourinhasaurus alenquerensis (Camarasauridae, Sauropada). #dinosaurs
May 15, 2025 at 8:36 AM
Em abril a @cienciasulisboa.bsky.social e Instituto Dom Luiz estiveram no XXIII Encuentro de Jóvenes Insvestigadores en Paleontología com @lexfonseca.bsky.social que falou sobre: "Appendicular myological reconstruction of Lourinhasaurus alenquerensis (Camarasauridae, Sauropada). #dinosaurs
Reposted by Alexandre Fonseca
Just published: "A revised name and new insights into the Middle Jurassic sauropod trackways from Portugal", by Vanda Santos!
The Galinha Quarry footprints have a new name: Galinhapodus gomesi.
Link to paper below 👇
The Galinha Quarry footprints have a new name: Galinhapodus gomesi.
Link to paper below 👇
December 3, 2024 at 11:43 PM
Just published: "A revised name and new insights into the Middle Jurassic sauropod trackways from Portugal", by Vanda Santos!
The Galinha Quarry footprints have a new name: Galinhapodus gomesi.
Link to paper below 👇
The Galinha Quarry footprints have a new name: Galinhapodus gomesi.
Link to paper below 👇
Iguanodont swimming, digital.
Originally started somewhere in 2022/23. Finished today.
Originally started somewhere in 2022/23. Finished today.
May 6, 2025 at 4:34 PM
Iguanodont swimming, digital.
Originally started somewhere in 2022/23. Finished today.
Originally started somewhere in 2022/23. Finished today.
Reposted by Alexandre Fonseca
Reposted by Alexandre Fonseca
😊🦕🦕🌈As últimas semanas foram intensas! Os meus alunos apresentaram o trabalho desenvolvido nos últimos meses em torno dos dinossáurios saurópodes e no âmbito dos projetos conduzidos pelo grupo de Paleontologia da
@cienciasulisboa.bsky.social e IDL (ULisboa) com a @uneduniv.bsky.social
@cienciasulisboa.bsky.social e IDL (ULisboa) com a @uneduniv.bsky.social
February 17, 2025 at 9:45 AM
😊🦕🦕🌈As últimas semanas foram intensas! Os meus alunos apresentaram o trabalho desenvolvido nos últimos meses em torno dos dinossáurios saurópodes e no âmbito dos projetos conduzidos pelo grupo de Paleontologia da
@cienciasulisboa.bsky.social e IDL (ULisboa) com a @uneduniv.bsky.social
@cienciasulisboa.bsky.social e IDL (ULisboa) com a @uneduniv.bsky.social
Reposted by Alexandre Fonseca
E por outro lado, P. Fonseca (@lexfonseca.bsky.social , @cienciasulisboa.bsky.social ), com "Appendicular myological reconstruction and functional analysis of Lourinhasaurus alenquerensis (Camarasauridae, Sauropoda)", em colaboração com Daniel Vidal (@uneduniv.bsky.social , University of Chicago)
February 17, 2025 at 9:45 AM
E por outro lado, P. Fonseca (@lexfonseca.bsky.social , @cienciasulisboa.bsky.social ), com "Appendicular myological reconstruction and functional analysis of Lourinhasaurus alenquerensis (Camarasauridae, Sauropoda)", em colaboração com Daniel Vidal (@uneduniv.bsky.social , University of Chicago)
Reposted by Alexandre Fonseca
Newest #watercolor in time for Valentines is of Khaan, two of which were discovered with slightly different tail vertebrae. Males may have had more muscles there for courtship displays. #sciart #paleoart
February 13, 2025 at 2:13 PM
Newest #watercolor in time for Valentines is of Khaan, two of which were discovered with slightly different tail vertebrae. Males may have had more muscles there for courtship displays. #sciart #paleoart
Reposted by Alexandre Fonseca
Full article: Revisiting Bird’s swimming sauropod: new insights on Manus-dominated Dinosaur Tracks from the Mayan Dude Ranch in Bandera, Texas www.tandfonline.com/doi/full/10....
Revisiting Bird’s swimming sauropod: new insights on Manus-dominated Dinosaur Tracks from the Mayan Dude Ranch in Bandera, Texas
Recent discoveries at Roland T. Bird’s famous ‘swimming brontosaur’ tracksite on the Mayan Dude Ranch in South Texas have resulted in seven additional footprints in Bird’s original sauropod trail, ...
www.tandfonline.com
February 12, 2025 at 8:04 PM
Full article: Revisiting Bird’s swimming sauropod: new insights on Manus-dominated Dinosaur Tracks from the Mayan Dude Ranch in Bandera, Texas www.tandfonline.com/doi/full/10....
Reposted by Alexandre Fonseca
New Jurassic avialan Baminornis zhenghensis: www.nature.com/articles/s41... The oldest known avialan with a pygostyle! 🪶🧪 (📷Chen et al.)
February 12, 2025 at 4:36 PM
New Jurassic avialan Baminornis zhenghensis: www.nature.com/articles/s41... The oldest known avialan with a pygostyle! 🪶🧪 (📷Chen et al.)
Reposted by Alexandre Fonseca
Welcome Baminornis! Only the second undoubted bird from the Jurassic. Joining the iconic Archaeopteryx.
But Baminornis could fly better!
My thoughts in this commentary for @nature.com
www.nature.com/articles/d41...
But Baminornis could fly better!
My thoughts in this commentary for @nature.com
www.nature.com/articles/d41...
The lost long tail of early bird evolution
Fossil find reveals the earliest known short-tailed bird.
www.nature.com
February 13, 2025 at 8:58 AM
Welcome Baminornis! Only the second undoubted bird from the Jurassic. Joining the iconic Archaeopteryx.
But Baminornis could fly better!
My thoughts in this commentary for @nature.com
www.nature.com/articles/d41...
But Baminornis could fly better!
My thoughts in this commentary for @nature.com
www.nature.com/articles/d41...
Reposted by Alexandre Fonseca
A LATE JURASSIC short-tailed bird from China
www.nature.com/articles/s41...
Baminornis zhenghensis gen. et sp. nov.
Art by Zhao Chuang
www.nature.com/articles/s41...
Baminornis zhenghensis gen. et sp. nov.
Art by Zhao Chuang
February 13, 2025 at 12:25 AM
A LATE JURASSIC short-tailed bird from China
www.nature.com/articles/s41...
Baminornis zhenghensis gen. et sp. nov.
Art by Zhao Chuang
www.nature.com/articles/s41...
Baminornis zhenghensis gen. et sp. nov.
Art by Zhao Chuang
Reposted by Alexandre Fonseca
My predecessor as State Paleontologist, Dave Gillette passed away on Feb. 10th. He will be missed. He oversaw the excavation of the Huntington Mammoth. @jlivelypaleo.bsky.social @utahpaleo-ufop.bsky.social
February 11, 2025 at 8:45 PM
My predecessor as State Paleontologist, Dave Gillette passed away on Feb. 10th. He will be missed. He oversaw the excavation of the Huntington Mammoth. @jlivelypaleo.bsky.social @utahpaleo-ufop.bsky.social
Reposted by Alexandre Fonseca
Pre-assembly for a new preparation lab, in Fes, Morocco on the hotel floor with Susie @tweetisaurus.bsky.social and Richard @richardjbutler.bsky.social
#fossils #dinosaurs #fossilprep #zoicpalaeotech
#fossils #dinosaurs #fossilprep #zoicpalaeotech
February 2, 2025 at 1:04 PM
Pre-assembly for a new preparation lab, in Fes, Morocco on the hotel floor with Susie @tweetisaurus.bsky.social and Richard @richardjbutler.bsky.social
#fossils #dinosaurs #fossilprep #zoicpalaeotech
#fossils #dinosaurs #fossilprep #zoicpalaeotech
Reposted by Alexandre Fonseca
Ajji M, J. & Lang, J.W. (2025) Gharial acoustic signaling: Novel underwater pops are temporally based, context-dependent, seasonally stable, male-specific, and individually distinctive. Journal of Anatomy, 00, 1–29. Available from: doi.org/10.1111/joa....
Gharial acoustic signaling: Novel underwater pops are temporally based, context‐dependent, seasonally stable, male‐specific, and individually distinctive
Male gharials (Gavialis gangeticus) produce loud underwater POPs by rapid jaw clapping 1–3×. POPs are temporally based, context-dependent, seasonally stable, and individually distinctive. The bulbous...
doi.org
February 1, 2025 at 1:54 PM
Ajji M, J. & Lang, J.W. (2025) Gharial acoustic signaling: Novel underwater pops are temporally based, context-dependent, seasonally stable, male-specific, and individually distinctive. Journal of Anatomy, 00, 1–29. Available from: doi.org/10.1111/joa....