Tracks of Limnopus heterodactylid left on the sand 280M years ago (Permian period of the Paleozoic). The rock comes from the recently discovered fossil deposit in Val d'Ambria, on the Orobic Alps, Italy.
#Valtellina #Italy #fossil #Permian #Paleozoic #AlpiOrobiche #italianalps #LimnopusHeterodactylid
@KateShaw has made a great new episode about a mystery cambrian invertebrate, a mystery fish, and some other mysteries. Also, some donation links are included at the end, if you can donate to help people affected by Hurricane Helene and its aftermath.
https://strangeanimalspodcast.blubrry.net/2024/09/30/episode-400-four-mysteries/
The source of #paleozoic (hemi-) #pelagic calcareous #mud (before the rise modern pelagic calcifiers) has been bugging me, again, recently.
I have seen arguments for calcification of #cyanobacterial filaments, calcareous #dinoflagellates, breakdown of thin-walled fossils, and I'm not negating #abiotic sources.
Does anyone have any thoughts on the topic?
Giant ‘sea scorpions’ hunted #Australian waters like sharks.
The two NSW sea scorpion or “eurypterid” fossils, which are in the order of 400 million years old, shed new light on how these fearsome creatures reigned in the #Paleozoic era.
https://www.stuff.co.nz/environment/350392767/giant-sea-scorpions-hunted-australian-waters-sharks #fossils
Wye o el animal Y (Escumasia roryi), una enigmática criatura de finales del Paleozoico (307 MdA) con forma de saco con dos brazos y un pedúnculo con el que se adhería a superficies sólidas, pudiendo estar relacionado con los cnidarios, como medusas y anémonas. 📷 Apokryltaros #Paleozoico #Paleozoic
Ancient #ocean oxygenation timeline revealed
https://phys.org/news/2024-04-ancient-ocean-oxygenation-timeline-revealed.html
Late Paleozoic #oxygenation of marine environments supported by #dolomite U-Pb dating https://www.nature.com/articles/s41467-024-46660-7
"Their record indicates a dramatic increase in the oxygenation of the #oceans during the Late #Paleozoic era, hundreds of millions of years after the emergence of the first #animals. This aligns with other evidence... supports the hypothesis that animals have evolved in oceans that were mostly oxygen-limited"
First discovered in 2002, paleontologist draw comparisons of #Dinocephalosaurus_orientalis with other aquatic species having no modern day analogs - why did the entire family of #Tanystropheidae or the genera exhibiting these morphological functionalities not continue?
Perhaps just as interesting is the convergent evolution (especially with respect to their necks) between that of Dinocephalosaurus and members of the Tanystropheus genus. A close resemblance on the surface, yet Dinocephalosaurus orientalis was strictly an aquatic species.
I've included an artists reconstructive rendition of Tanystropheus longobardicus for comparison between the two, but note that Dinocephalosaurus had four flipper-like feet of the same size, and unable to exist, or at least thrive in a terrestrial environment, where Tanystropheus exhibited larger feet in the rear - not unlike your hands being smaller than your feet.
And yes, as Yuki (@youronlyone) offers up as a contemplative inference, the whole "Dragon" and "Loch Ness Monster" corollaries are uncanny, raising questions as to why would pre-industrial societies actually have such fables, or in the case of the latter, claims of sightings, if not rooted in some previous observation by humans?
Dinocephalosaurus was extant from the late #Paleozoic (late Permian period) through the early #Mesozoic (early Triassic period) eras.
#tallship #Dinocephalosaurus #Triassic #Tanystropheus #Tanystropheus_longobardicus h/t to @youronlyone for bringing the latest news on this matter to me - I'm always fascinated with things related to #marine_biology - especially #Opisthobranchia
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RE: https://c.im/users/youronlyone/statuses/111985758251416307
289-Million-Year-Old #Cave System Preserves Oldest-Known Fossilized Skin
https://www.sci.news/paleontology/captorhinus-aguti-skin-12605.html
#Paleozoic cave system preserves oldest-known evidence of amniote skin https://www.cell.com/current-biology/fulltext/S0960-9822(23)01663-9
"The newly-described fossilized skin belonged to #Captorhinus aguti, a species of early #reptile that lived during the #Permian period... The #skin fragment, which is smaller than a fingernail, has a pebbled surface and most closely resembles #crocodile skin."
Look what arrived while I was out of town! @keeseycomics
#Paleozoic
During what era did you join Mastodon?
#Cenozoic
#Mesozoic
#Paleozoic
#Neoproterozoic
#dinosaurs
#fossils
Ancient lake #microbes caused global warming during ice age
https://phys.org/news/2023-08-ancient-lake-microbes-global-ice.html
Effects on #GlobalWarming by microbial #methanogenesis in #AlkalineLakes during the Late #Paleozoic #IceAge https://pubs.geoscienceworld.org/gsa/geology/article-abstract/doi/10.1130/G51286.1/627322/Effects-on-global-warming-by-microbial
"Global warming has occurred numerous times over Earth's history, with one such event happening 304 million years ago during the #LatePaleozoicIceAge. Studies have discovered increased sea surface temperature, ice decline and oceanic environments flooding the land at the time."
#WeekendReading: Been thinking a fiar bit on #Paleozoic #nutrients cycling, so I'm revisiting Sharon and Halevy's paper on Phanerozoic marine #phosphate levels regulation.
https://www.nature.com/articles/s41561-022-01075-1
My other artwork which I never uploaded here, is the Dunkleosteus. Commissioned by Dr. Brian Curtice.
Thank you to Mr. Russell Engelman for providing me with fruitful comments about this drawing.
#Arthrodira #Sciart #Paleoart #Paleoartist #Devonian #Placoderm #Paleozoic
Which of these #Paleozoic periods is the most underrated?
#Gneiss boulder
I came upon this stream-polished boulder along the Quinebaug River, just below East Brimfield Reservoir near #Sturbridge, #Massachusetts. Because it has been transported and I just took a photo, I don’t know its origins…but it looks like either the Quinebaug or Marlboro formations, Ordovician and Cambrian, respectively. Laurentia, not Gondwana. Lovely banding, eh? Lens cap is about 4 cm in diameter.
#gneiss #Paleozoic #metamorphic #geology #photo 27 mm #Fujifilm
Dunkleosteus, the terror of the Late Devonian ocean!
Now the more #riebeckite facies of the #Paleozoic #Quincy #Granite
The Quincy granite was a prized architectural stone, most famously used in the #BunkerHill Monument in #Boston #Massachusetts. Current dating suggests it was intruded into #Avalonia before it glommed onto #Laurentia as #Laurasia and #Pangea were assembled. Today’s #photo set comes from a walk around the eponymous Bunker Hill Quarry. I’ll post more about the history later. Captions!
#Fujifilm #XH1 #igneous #intrusive #NewEngland
