#oligocene — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #oligocene, aggregated by home.social.
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Fossile di Merycoidodon sp. (Oreodont)
Periodo : Oligocene
Provenienza : Badlans, South Dakota, USADimensione : 25x24x22 mm
reagisce agli UV
#fossile #Merycoidodon #mammifero #fossils #SouthDakota #USA #oligocene
https://geocollection.net/it/mammiferi/880-fossile-di-merycoidodon-sp-oreodont.html
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Fossile di Merycoidodon sp. (Oreodont)
Periodo : Oligocene
Provenienza : Badlans, South Dakota, USADimensione : 25x24x22 mm
reagisce agli UV
#fossile #Merycoidodon #mammifero #fossils #SouthDakota #USA #oligocene
https://geocollection.net/it/mammiferi/880-fossile-di-merycoidodon-sp-oreodont.html
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Fossile di Merycoidodon sp. (Oreodont)
Periodo : Oligocene
Provenienza : Badlans, South Dakota, USADimensione : 25x24x22 mm
reagisce agli UV
#fossile #Merycoidodon #mammifero #fossils #SouthDakota #USA #oligocene
https://geocollection.net/it/mammiferi/881-fossile-di-merycoidodon-sp-oreodont.html
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RE: https://mastodon.green/@plazi_species/115904831661478242
How can allopatric #speciation lead to the #radiation of #newspecies, and how can #research succeed in reconstructing such mechanisms? #Cryptic #complexes such as the #Hemiphyllodactylus #harterti-complex (#Gekkonidae) can be revealing.
Z. Hong et al. (2026) #phylogenetically identified two new species by using the #mitochondrialgene #ND2. The #ancestral #population of the complex is thought to have diverged in the Middle #Oligocene and radiated from there throughout #Malaysia.
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RE: https://mastodon.green/@plazi_species/115904831661478242
How can allopatric #speciation lead to the #radiation of #newspecies, and how can #research succeed in reconstructing such mechanisms? #Cryptic #complexes such as the #Hemiphyllodactylus #harterti-complex (#Gekkonidae) can be revealing.
Z. Hong et al. (2026) #phylogenetically identified two new species by using the #mitochondrialgene #ND2. The #ancestral #population of the complex is thought to have diverged in the Middle #Oligocene and radiated from there throughout #Malaysia.
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RE: https://mastodon.green/@plazi_species/115904831661478242
How can allopatric #speciation lead to the #radiation of #newspecies, and how can #research succeed in reconstructing such mechanisms? #Cryptic #complexes such as the #Hemiphyllodactylus #harterti-complex (#Gekkonidae) can be revealing.
Z. Hong et al. (2026) #phylogenetically identified two new species by using the #mitochondrialgene #ND2. The #ancestral #population of the complex is thought to have diverged in the Middle #Oligocene and radiated from there throughout #Malaysia.
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RE: https://mastodon.green/@plazi_species/115904831661478242
How can allopatric #speciation lead to the #radiation of #newspecies, and how can #research succeed in reconstructing such mechanisms? #Cryptic #complexes such as the #Hemiphyllodactylus #harterti-complex (#Gekkonidae) can be revealing.
Z. Hong et al. (2026) #phylogenetically identified two new species by using the #mitochondrialgene #ND2. The #ancestral #population of the complex is thought to have diverged in the Middle #Oligocene and radiated from there throughout #Malaysia.
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RE: https://mastodon.green/@plazi_species/115904831661478242
How can allopatric #speciation lead to the #radiation of #newspecies, and how can #research succeed in reconstructing such mechanisms? #Cryptic #complexes such as the #Hemiphyllodactylus #harterti-complex (#Gekkonidae) can be revealing.
Z. Hong et al. (2026) #phylogenetically identified two new species by using the #mitochondrialgene #ND2. The #ancestral #population of the complex is thought to have diverged in the Middle #Oligocene and radiated from there throughout #Malaysia.
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https://www.europesays.com/ie/143482/ Fossil of Carnivorous ‘Swamp Monster’ Found in Brazil #ApexPredator #Brazil #Canine #Carnivory #Éire #fossil #Hypercarnivory #IE #Ireland #Metatheria #Metatherian #Oligocene #Proborhyaenidae #Science #SouthAmerica #Sparassodont #TaubateBasin #Teeth #TremembeFormation
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El Arsinoitherium fue un mamífero del Eoceno tardío al Oligoceno temprano (36-27 MdA) con dos grandes y gruesos cuernos sobre la nariz y otro par pequeño sobre los ojos. Aunque tiene unas dimensiones similares al rinoceronte blanco, y recuerda a él, es un penungulado próximo a los elefantes, mientras los rinocerontes son perisodáctilos relacionados con los caballos y tapires. Además, sus cuernos son de hueso. #eoceno #eocene #oligoceno #oligocene
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El Arsinoitherium fue un mamífero del Eoceno tardío al Oligoceno temprano (36-27 MdA) con dos grandes y gruesos cuernos sobre la nariz y otro par pequeño sobre los ojos. Aunque tiene unas dimensiones similares al rinoceronte blanco, y recuerda a él, es un penungulado próximo a los elefantes, mientras los rinocerontes son perisodáctilos relacionados con los caballos y tapires. Además, sus cuernos son de hueso. #eoceno #eocene #oligoceno #oligocene
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Newly Discovered Prehistoric Whale Is Deceptively Cute—It’s Tiny but Has a Mouth Full of Razor-Sharp Teeth https://www.smithsonianmag.com/smart-news/newly-discovered-prehistoric-whale-is-deceptively-cute-its-tiny-but-has-a-mouth-full-of-razor-sharp-teeth-180987165/
An immature toothed mysticete from the #Oligocene of Australia & insights into mammalodontid morphology, systematics, ontogeny https://academic.oup.com/zoolinnean/article/204/4/zlaf090/8231955
"It is a species of mammalodontid—a small, early type of baleen #whale that didn’t have baleen... It helps fill a missing chapter of the transition from early carnivorous #whales to the filter-feeding baleen whales"
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Studi / Fossile di rinoceronte risalente a oltre 21 milioni di anni fa riscrive la storia evolutiva
Redazione
Un importante studio internazionale appena pubblicato sulla prestigiosa rivista Nature ha recuperato sequenze proteiche da un fossile di rinoceronte risalente a oltre 21 milioni di anni, spostando indietro nel tempo i limiti della paleoproteomica di ben dieci volte rispetto a quelli del DNA antico.
La ricerca, che segna una svolta nella ricostruzione dell’evoluzione delle specie estinte, vede coinvolte due ricercatrici dell’Università di Torino: Meaghan Mackie, dottoranda del Dipartimento di Scienze della Vita e Biologia dei Sistemi di UniTo e dell’University College Dublin, e la sua supervisor, la Prof.ssa Beatrice Demarchi, docente ordinaria presso l’Ateneo torinese ed esperta di biomolecole antiche.
Lo studio, coordinato dal Globe Institute dell’Università di Copenaghen, ha ricostruito sequenze proteiche dallo smalto dentale di un rinoceronte vissuto nell’attuale Artico canadese durante il Miocene inferiore. Grazie alla stabilità dello smalto e alle condizioni ambientali estreme del cratere di Haughton — freddo costante e permafrost — le proteine sono risultate sorprendentemente ben conservate. Queste sequenze proteiche antiche hanno permesso di collocare con precisione evolutiva il rinoceronte all’interno del suo albero genealogico, e suggeriscono che la divergenza tra le sottofamiglie Elasmotheriinae e Rhinocerotinae sia avvenuta durante l’Oligocene (34–22 milioni di anni fa), più recentemente di quanto ipotizzato in precedenza.
Il contributo del team dell’Università di Torino è stato cruciale per la validazione dei dati e l’interpretazione dei processi di diagenesi proteica. “Abbiamo calcolato – spiega la Prof.ssa Beatrice Demarchi – che la bassa temperatura ha reso l’età termica del campione equivalente a quella di un reperto dieci volte più giovane in un luogo con temperatura media di 10°C, il che significa che le proteine erano significativamente meno danneggiate rispetto a quelle che si trovano in luoghi della stessa età geologica ma con clima più caldo”.
“È stato sorprendente – commenta Meaghan Mackie -. Il primo campione che ho analizzato pensavo non contenesse nulla, perché troppo antico! Sono rimasta a fissare lo schermo del computer per un minuto”. Questo risultato apre nuove prospettive per la ricerca evolutiva e la paleoproteomica perché permette di ricostruire la storia evolutiva di specie estinte da milioni di anni, ben oltre i limiti del DNA e, in prospettiva, potrebbe riaccendere le speranze per lo studio della biologia di specie dell’era Mesozoica. Indagini future su fossili della Formazione di Haughton e di altri contesti simili potrebbero far emergere ulteriori tracce di questa straordinaria conservazione biomolecolare.
“Si profila una nuova fase per la biologia evolutiva – aggiunge la Prof.ssa Demarchi – in cui le proteine antiche diventano preziosi testimoni della storia più remota della vita sulla Terra. Per l’Università di Torino, questo risultato conferma il ruolo di primo piano nell’ambito della paleobiologia molecolare internazionale”.
Link all’articolo: www.nature.com/articles/s41586-025-09231-4
Immagine in apertura: Rinoceronti (Wikimedia commons)
#canada #DnaAntico #fossile #GlobeInstituteDellUniversitàDiCopenaghen #Nature #Oligocene #rinoceronte #studi #UniversitàDiTorino #UniversityCollegeDublin
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My 25 years of palaeoart chronology...
In 2022 Jason Osborne and I reconstructed the Early Oligocene toothed whale Ediscetus osbornei, and here are some zooms into the artwork I created for Jason. The two Ediscetus are chasing a school of Spanish mackerel.
#Art #Painting #PaleoArt #PalaeoArt #SciArt #SciComm #DigitalArt #Illustration #Dinosaurs #Birds #Reptiles #Palaeontology #Paleontology #Ediscetus #Mackerel #Whales #Oligocene #JurassicPark #JurassicWorld
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My 25 years of palaeoart chronology...
In 2022 Jason Osborne and I reconstructed the Early Oligocene toothed whale Ediscetus osbornei, and here are some zooms into the artwork I created for Jason. The two Ediscetus are chasing a school of Spanish mackerel.
#Art #Painting #PaleoArt #PalaeoArt #SciArt #SciComm #DigitalArt #Illustration #Dinosaurs #Birds #Reptiles #Palaeontology #Paleontology #Ediscetus #Mackerel #Whales #Oligocene #JurassicPark #JurassicWorld
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My 25 years of palaeoart chronology...
In 2022 Jason Osborne and I reconstructed the Early Oligocene toothed whale Ediscetus osbornei, and here is the artwork I created for Jason. The two Ediscetus are chasing a school of Spanish mackerel.
#Art #Painting #PaleoArt #PalaeoArt #SciArt #SciComm #DigitalArt #Illustration #Dinosaurs #Birds #Reptiles #Palaeontology #Paleontology #Ediscetus #Mackerel #Whales #Oligocene #JurassicPark #JurassicWorld
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My 25 years of palaeoart chronology...
In 2022 Jason Osborne and I reconstructed the Early Oligocene toothed whale Ediscetus osbornei, and here is the artwork I created for Jason. The two Ediscetus are chasing a school of Spanish mackerel.
#Art #Painting #PaleoArt #PalaeoArt #SciArt #SciComm #DigitalArt #Illustration #Dinosaurs #Birds #Reptiles #Palaeontology #Paleontology #Ediscetus #Mackerel #Whales #Oligocene #JurassicPark #JurassicWorld
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The John Day Fossil Beds National Monument (JODA) preserves a fantastic record of Oregon's #Eocene and #Oligocene environments. A new study examines several JODA trackways to further understand fauna and their behaviors in these changing ecosystems.
Image: Figure 2 from the paper. Digital elevation model (DEM) of avian tracks from JODA 1536. Scale bar equals ~20mm.
Authors: Conner J Bennett, Nicholas A Famoso, and Daniel I Hembree
Full #OpenAccess Paper:
https://doi.org/10.26879/1413 -
El armadillo cornudo (Peltephilus) fue un mamífero herbívoro de grandes dientes triangulares que vivió en el Oligoceno (34-23 MdA) y se extinguió en el Mioceno (23-5,3 MdA). Es el otro mamífero fosorial conocido con cuernos.📷Apokryltaros #oligoceno #oligocene #mioceno #miocene
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El armadillo cornudo (Peltephilus) fue un mamífero herbívoro de grandes dientes triangulares que vivió en el Oligoceno (34-23 MdA) y se extinguió en el Mioceno (23-5,3 MdA). Es el otro mamífero fosorial conocido con cuernos.📷Apokryltaros #oligoceno #oligocene #mioceno #miocene
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Professor Helps Discover Global Gap In Geologic Record
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https://phys.org/news/2024-10-professor-global-gap-geologic.html <-- shared technical article
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https://doi.org/10.1016/j.earscirev.2024.104912 <-- shared paper
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#geology #sedimentation #sediment #offshore #coast #coastal #model #modeling #sealevel #erosion #weathering #continentalshelf #geologichistory #submarine #unconformity #pelagic #marine #continentalmargin #sedimentology #siliciclastic #icehousetransition #eocene #oligocene #slope #basinfloor #submarinecanyon #masswasting #debrisflow -
Professor Helps Discover Global Gap In Geologic Record
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https://phys.org/news/2024-10-professor-global-gap-geologic.html <-- shared technical article
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https://doi.org/10.1016/j.earscirev.2024.104912 <-- shared paper
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#geology #sedimentation #sediment #offshore #coast #coastal #model #modeling #sealevel #erosion #weathering #continentalshelf #geologichistory #submarine #unconformity #pelagic #marine #continentalmargin #sedimentology #siliciclastic #icehousetransition #eocene #oligocene #slope #basinfloor #submarinecanyon #masswasting #debrisflow -
Arsinoitherium, everyone's favorite embrithopod features in this great article about primates of the Oligocene, by JK Revell :
https://synapsida.blogspot.com/2024/09/oligocene-pt-11-early-monkeys-and-two.html -
Arsinoitherium, everyone's favorite embrithopod features in this great article about primates of the Oligocene, by JK Revell :
https://synapsida.blogspot.com/2024/09/oligocene-pt-11-early-monkeys-and-two.html -
Three new ancestors added to #TasmanianTiger's storyline https://phys.org/news/2024-09-ancestors-added-tasmanian-tiger-storyline.html
Three new #thylacinids (Marsupialia, Thylacinidae) from late Oligocene deposits of the #Riversleigh World Heritage Area, northwestern #Queensland https://www.tandfonline.com/doi/full/10.1080/02724634.2024.2384595
"#paleontologists say the #NewSpecies are now the oldest members of the #Thylacine family to date, estimated to be 25–23 million years old, making them late #Oligocene in age."
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Three new ancestors added to #TasmanianTiger's storyline https://phys.org/news/2024-09-ancestors-added-tasmanian-tiger-storyline.html
Three new #thylacinids (Marsupialia, Thylacinidae) from late Oligocene deposits of the #Riversleigh World Heritage Area, northwestern #Queensland https://www.tandfonline.com/doi/full/10.1080/02724634.2024.2384595
"#paleontologists say the #NewSpecies are now the oldest members of the #Thylacine family to date, estimated to be 25–23 million years old, making them late #Oligocene in age."
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Fósil de cuatro serpientes Hibernophis breithaupti del Oligoceno temprano, hace 38 millones de años, que se conservaron gracias a los depósitos de ceniza volcánica. Son antepasadas de las boas y la pitones. 📷Jasmine Croghan #oligoceno #oligocene
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Fósil de cuatro serpientes Hibernophis breithaupti del Oligoceno temprano, hace 38 millones de años, que se conservaron gracias a los depósitos de ceniza volcánica. Son antepasadas de las boas y la pitones. 📷Jasmine Croghan #oligoceno #oligocene
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#Penguin wing #fossil shows importance of #Zealandia in penguin #evolution https://phys.org/news/2024-08-penguin-wing-fossil-importance-zealandia.html
A new tiny fossil penguin from the Late #Oligocene of #NewZealand and the morphofunctional transition of the penguin wing https://www.tandfonline.com/doi/full/10.1080/03036758.2024.2362283
Named Pakudyptes hakataramea, the penguin was very small—about the same size as the little blue penguin, the smallest in the world—with anatomical adaptations that allowed it to dive.
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#Penguin wing #fossil shows importance of #Zealandia in penguin #evolution https://phys.org/news/2024-08-penguin-wing-fossil-importance-zealandia.html
A new tiny fossil penguin from the Late #Oligocene of #NewZealand and the morphofunctional transition of the penguin wing https://www.tandfonline.com/doi/full/10.1080/03036758.2024.2362283
Named Pakudyptes hakataramea, the penguin was very small—about the same size as the little blue penguin, the smallest in the world—with anatomical adaptations that allowed it to dive.
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New #fossil snake species provides insight into reptile social behavior and development
https://phys.org/news/2024-07-fossil-snake-species-insight-reptile.htmlMorphology and systematics of a new fossil #snake from the early #Rupelian (#Oligocene) White River Formation, #Wyoming https://academic.oup.com/zoolinnean/advance-article-abstract/doi/10.1093/zoolinnean/zlae073/7696309
"The specimens were preserved in a cluster within a hibernaculum, a space where #animals shelter together during colder months. Their position represents social behavior in #snakes, which is something that we don't often see"
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New #fossil snake species provides insight into reptile social behavior and development
https://phys.org/news/2024-07-fossil-snake-species-insight-reptile.htmlMorphology and systematics of a new fossil #snake from the early #Rupelian (#Oligocene) White River Formation, #Wyoming https://academic.oup.com/zoolinnean/advance-article-abstract/doi/10.1093/zoolinnean/zlae073/7696309
"The specimens were preserved in a cluster within a hibernaculum, a space where #animals shelter together during colder months. Their position represents social behavior in #snakes, which is something that we don't often see"
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Sketch of an Oreodont made with graphite. ✏️
#oreodont #jurassicpark #fossils #oligocene #paleontology #prehistoricplanet #prehistoric #cenozoic #fossil #jurassicworld #prehistoricmammals #lifeonourplanet #nature #extinctanimals #prehistory #geology #art #realism -
La Xenerodiops mycter fue una garza robusta del oligoceno (33 MdA) con un potente pico corto y pesado, curvado hacia arriba. Probablemente habitó en pantanos. #aves #birds #oligoceno #oligocene 📷Ripley Cook
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La Xenerodiops mycter fue una garza robusta del oligoceno (33 MdA) con un potente pico corto y pesado, curvado hacia arriba. Probablemente habitó en pantanos. #aves #birds #oligoceno #oligocene 📷Ripley Cook
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Oligocene (Pt 9): Rise of the Dogs https://synapsida.blogspot.com/2024/06/oligocene-pt-9-rise-of-dogs.html
"Many of the carnivorous #mammals present in North America during the #Oligocene were of types also found in Eurasia. However, this far back in time, they did not necessarily belong to any family of #animals we would recognise. Cats, for example, first appeared in Europe at the end of the epoch and did not reach the Americas until much later. Other groups, such as raccoons, simply didn't exist yet."
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Oligocene (Pt 9): Rise of the Dogs https://synapsida.blogspot.com/2024/06/oligocene-pt-9-rise-of-dogs.html
"Many of the carnivorous #mammals present in North America during the #Oligocene were of types also found in Eurasia. However, this far back in time, they did not necessarily belong to any family of #animals we would recognise. Cats, for example, first appeared in Europe at the end of the epoch and did not reach the Americas until much later. Other groups, such as raccoons, simply didn't exist yet."
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#Oligocene-Period #Dolphin Had Unique Feeding Method https://www.sci.news/paleontology/aureia-rerehua-12827.html
#Aureia rerehua, a new platanistoid dolphin from the Oligocene of #NewZealand with a unique feeding method https://www.tandfonline.com/doi/full/10.1080/03036758.2024.2314505
"Aureia rerehua had unique #teeth which might have formed a cage around small #fish; these teeth, along with a weak vertex, flexible neck, and the smallest size among its relatives would make it a capable hunter in shallow waters"
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#Oligocene-Period #Dolphin Had Unique Feeding Method https://www.sci.news/paleontology/aureia-rerehua-12827.html
#Aureia rerehua, a new platanistoid dolphin from the Oligocene of #NewZealand with a unique feeding method https://www.tandfonline.com/doi/full/10.1080/03036758.2024.2314505
"Aureia rerehua had unique #teeth which might have formed a cage around small #fish; these teeth, along with a weak vertex, flexible neck, and the smallest size among its relatives would make it a capable hunter in shallow waters"
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Oligocene (Pt 7): Not Quite Camels, Not Quite Pigs https://synapsida.blogspot.com/2024/02/oligocene-pt-7-not-quite-camels-not.html
"While the #ruminants of #Oligocene North America would have looked similar to the #MuskDeer of today, some of the other cloven-hoofed #mammals inhabiting the continent at the time were more distinctive..."
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Oligocene (Pt 7): Not Quite Camels, Not Quite Pigs https://synapsida.blogspot.com/2024/02/oligocene-pt-7-not-quite-camels-not.html
"While the #ruminants of #Oligocene North America would have looked similar to the #MuskDeer of today, some of the other cloven-hoofed #mammals inhabiting the continent at the time were more distinctive..."
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Esa piedra con forma de espiral es lo que se llama un "sacacorchos del diablo". Se trata de madrigueras de Palaeocastor del Mioceno encontradas en Wyoming y Nebraska. #paleofauna #oligoceno #oligocene #mioceno #miocene #wyoming #nebraska
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Esa piedra con forma de espiral es lo que se llama un "sacacorchos del diablo". Se trata de madrigueras de Palaeocastor del Mioceno encontradas en Wyoming y Nebraska. #paleofauna #oligoceno #oligocene #mioceno #miocene #wyoming #nebraska
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Pacific #KelpForests are way older than we thought
https://www.futurity.org/pacific-kelp-forests-age-3167012/Early #Oligocene kelp holdfasts and stepwise #evolution of the kelp ecosystem in the North Pacific https://www.pnas.org/doi/10.1073/pnas.2317054121
"#kelp flourished off the US Northwest Coast more than 32 million years ago, long before the appearance of modern groups of marine #mammals, #SeaUrchins, #birds, and #bivalves that today call the forests home."
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Pacific #KelpForests are way older than we thought
https://www.futurity.org/pacific-kelp-forests-age-3167012/Early #Oligocene kelp holdfasts and stepwise #evolution of the kelp ecosystem in the North Pacific https://www.pnas.org/doi/10.1073/pnas.2317054121
"#kelp flourished off the US Northwest Coast more than 32 million years ago, long before the appearance of modern groups of marine #mammals, #SeaUrchins, #birds, and #bivalves that today call the forests home."
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#WeekendReading: Podder et al. using foraminiferal assemblages to deduce the impact of oceanic gateway closure on the #IndianOcean hydrography since the #Oligocene.
https://linkinghub.elsevier.com/retrieve/pii/S0921818123003090
