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#Paleozoic

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@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.
strangeanimalspodcast.blubrry.

#birds
#sharks
#invertebrates
#paleozoic

strangeanimalspodcast.blubrry.net Episode 400: Four no wait Five Mysteries! | Strange Animals Podcast

Ancient #ocean oxygenation timeline revealed
phys.org/news/2024-04-ancient-

Late Paleozoic #oxygenation of marine environments supported by #dolomite U-Pb dating nature.com/articles/s41467-024

"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?

https://edition.cnn.com/2024/02/23/world/dragon-fossil-240-million-years-old-intl-scli-scn/index.html

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

@youronlyone

289-Million-Year-Old #Cave System Preserves Oldest-Known Fossilized Skin
sci.news/paleontology/captorhi

#Paleozoic cave system preserves oldest-known evidence of amniote skin cell.com/current-biology/fullt

"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."

Ancient lake #microbes caused global warming during ice age
phys.org/news/2023-08-ancient-

Effects on #GlobalWarming by microbial #methanogenesis in #AlkalineLakes during the Late #Paleozoic #IceAge pubs.geoscienceworld.org/gsa/g

"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."

#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

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