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lancasterstones · 4 months ago

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stonecraftcreation · 1 year ago

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Rose Quartz Counter Top Slab, Agate Quartz Coffee Kitchen Slab Top, Handmade Decors Top Table

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#coffee table #homedecor #center table #diningtable #handmadefurniture #agategeodetable #agatetable #agate stone #countertops #counterslab

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pleistocene-pride · 2 years ago

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Anurognathus is a genus of small pterosaur that lived throughout what is now Europe during the Tithonian stage of the Late Jurassic Period some 151 to 146 MYA. The first remains of anurognathus where unearthed from the found in the Solnhofen limestone near Eichstätt Germany by Bavarian geologist Ludwig von Ammon in 1922. This holotype consists of a crushed, relatively complete skeleton on a slab. The counterslab is missing meaning parts of the skeleton are only visible as an impression. Recognizing the importance of this find Ammon gave it to his friend Dr. Ludwig Döderlein at the Bavarian State Musuem for Paleontology and Geology. Doderlein then formally named and described the specimen Anurognathus ammoni in 1923, with the genus name Anurognathus coming from the Greek an- "without", oura -"tail", and gnathos -"jaw" in reference to its unusually small tail with the name honoring Ammon. With a second more complete specimen of a subadult was found, and described by S. Christopher Bennet in 2007, giving a more complete picture of the animal. Reaching around 3-4 inches in length, 1-3 oz in weight, and sporting a 14-20 inch wingspan, Anurognathus had a disproportionately large skull for such a small creature, the teeth are small and sharp, and the head is wider than it is long. The eyes are also large and slightly face forwards allowing for some depth perception through what is termed as binocular vision. And the body would have been covered in hair like pcynofibers. In life it is thought that Anurognathus would have been a swift flying insectivore fulfilling a similar niche to modern bats or nightjars. Study of the eyes and the scleral rings that were inside them lead towards a crepuscular lifestyle, meaning that Anurognathus would have been most active in the twilight of the dawn and dusk. While this tiny pterosaur would have been an accomplished hunter of insects, Anurognathus may have also have been hunted itself by larger pterosaurs, dinosaurs, and early birds.

Art found at the following links:

https://twitter.com/serpenillus/status/614506779737587712

https://www.pteros.com/pterosaurs/anurognathus.html

https://eartharchives.org/articles/anurognathus-the-tiny-jurassic-pterosaur/index.html

http://markwitton-com.blogspot.com/2015/01/bonus-pterosaur-anurognathid-art-youve.html

#Anurognathus #pterosaur #dinosaur #jurassic #Mesozoic #pleistocene pride

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paleochick · 7 years ago

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A pterosaur so nice it fossilized TWICE! I missed #PterosaurPtuesday this week, so I'm coming at'cha with a double whammy! This young #Pterodactylus antiquus was found in Solnhofen, Germany. If the location sounds familiar, that's because that's where the famous Archaeopteryx lithographica specimen was found! Why was this specimen preserved twice? The actual fossil skeleton is on the right. The counterslab on the left is the impression that the skeleton left behind in the soft sediment. When this specimen was discovered, it was cracked in half, revealing the specimen AND it's impression, inside. Specimen no. AMNH1942 Solnhofen, Germany Late Jurassic (at Cleveland Museum of Natural History)

#pterodactylus #pterosaurptuesday

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fumpkins · 6 years ago

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Breathing new life into a 120 million-year old Bird!

In the middle of the desert in Albuquerque, New Mexico; Fossilized lungs discovered preserved within with an ancient bird might revive research studies of early bird respiration. If verified as lungs, the discovery marks the very first time that scientists have actually found the respiratory organs in a bird fossil.

Scientists have actually formerly described 4 fossils of Archaeorhynchus spathula, an early beaked and feathered bird that lived about 120 million years earlier. But unlike those discoveries, a recently explained 5th specimen consists of substantial traces of plumage, and, a lot more surprising, the possible residues of a set of lungs, scientists state.

Vertebrate paleontologist Jingmai O’Connor and coworkers reported the findings October 18 at the Society for Vertebrate Paleontology’s yearly conference. The outcomes were also released online October 18 in the Proceedings of the National Academy of Sciences.

About the size of a thrush, Archaeorhynchus was amongst the earliest ornithuromorphs, the family tree that caused modern-day birds. It was most likely an herbivore, as all understood fossils of the animal include maintained gizzard stones which some animals utilize to assist grind food, in the stomach. The brand-new fossil was discovered in northeastern China and belongs to the Jehol Biota That wealth of unspoiled fossils dates to in between 133 million and 120 million years back and consists of various feathered dinosaurs in addition to birds.

The new Archaeorhynchus fossil remarkably consists of much of the very same structures, the team revealed. That recommends that these essential breathing adjustments existed extremely early in the modern-day bird family tree.

Like numerous fossils, the brand-new Archaeorhynchusspecimen is divided into 2 halves, a primary piece and its mirror image called a counterslab. Both pieces have uncommon functions. The chest cavity on the primary piece consists of an odd, white speckly area. And the counterslab has 2 almost in proportion lobe-shaped areas representing the speckly white area. The lobes’ position, which there were 2 of them, recommends the possibility of lungs, O’Connor stated. The structures were not likely to be stomach contents, which normally appear black and carbonized in fossils. And while the liver can have 2 lobes in birds, it tends to appear reddish due to its high iron material. To get a closer take a look at the tiny structures of possible tissues in the speckly area, O’Connor and her group utilized scanning electron microscopy to research study 22 samples from the fossil, consisting of 12 from the supposed lung tissue. The images exposed an extremely partitioned area of tissue called the parenchymatous area, which included numerous carefully jam-packed air cells. That structure resembles the air-blood vessels discovered in little modern-day birds, O’Connor kept in mind.

The fossilized plumes, on the other hand, recommend that the bird had a pointed tail called a pintail, something formerly unidentified in birds that lived throughout the Mesozoic Era however discovered in modern-day birds such as the pintail duck. And like the other Archaeorhynchus fossils, the group discovered gastroliths in the bird’s stomach– more than 100 of them.

Still, other scientists aren’t encouraged that the maintained product represents lungs, in part due to the fact that it’s unclear how the lungs would endure fossilization. “I think Jingmai has made about the best possible case with the materials and results she has,” states Corwin Sullivan, a vertebrate paleontologist at the University of Alberta in Edmonton,Canada “I’d very much like it to be true, but there are a few too many question marks about how such tissues could have been preserved,” he states.

Sullivan keeps in mind that the product appears not to have actually been entirely compressed into two-dimensions throughout fossilization– which would be especially unexpected for reasonably fragile tissue like a lung. “But then I don’t know what a fossilized bird lung would look like. None of us do.” Fossil lungs, he states, need to be on the list of possibilities of what the structures are.

YOU MAY LIKE: Researchers Were Able To Transfer Memories From One Snail to Another. What Does It Mean For Humans.

“I knew that a lot of people would be rightfully skeptical” about the lungs, O’Connor stated. But bird lungs, though apparently fragile, contain some durable structures that might have helped the tissues became preserved, or maybe the chemical environment in which the animal died was particularly conducive to preservation. But these are all simply hypotheses, O’Connor stated. The group is preparing future research to address this and other concerns about how this bird breathed.

As unexpected as discovering fossilized bird lungs would be, any other possible descriptions for the material would be similarly uncommon, Sullivan states. For example, he recommends that it may be associated with the gastroliths in some method. “I wonder if they could have partially dissolved, spilled forward into the body cavity or something unusual like that. Whatever is happening, it’s very strange and very interesting.”

New post published on: https://www.livescience.tech/2018/11/11/breathing-new-life-120-million-year-old-bird/

#birds #dinosaur #fossil #history #old

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lancasterstones · 4 months ago

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