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Description
Diplodocus carnegii

Sauropod dinosaurs are among the most iconic creatures that have ever walked the planet. These awesome creatures became prevalent in the Early Jurassic and died out at the end of the Cretaceous period. Bar-none, the most famous was Diplodocus, specifically Diplodocus carnegii.

History:

In Wyoming in early 1898, a femur was recovered. In December of that same year, the animal's thigh bone was described and shown in the New York Journal-American newspaper article. Andrew Carnegie saw the article and had the Carnegie Museum's curator, William Holland contract Paleontologist John Bell Hatcher to try and recover more of the skeleton. Eventually in 1899, they recovered the rest of the torso, about a quarter of the tail and most of the neck. As far as Sauropod skeletons go, this was a relatively complete specimen. They were subsequently taken back to Philadelphia where paleontologists tried to fill in the gaps. In 1901, Hatcher described the specimen as a new species of Diplodocus, and he called it "Diplodocus carnegii". The genus name means "Double-Beam" in Greek and Carnegii after Andrew Carnegie himself as he helped fund the expeditions out to Wyoming.
The specimen: CM 84 was put on display at the Carnegie Museum of Natural History in 1907. It has also been dubbed "Dippy" for obvious reasons.
However, this skeleton would make the word "dinosaur" famous the world over. Prior to it even being on display, in 1902, King Edward VII saw a sketch of the bones at Andrew Carnegie's Home. After the King had some discussion with the wealthy American philanthropist, Carnegie agreed to donate a cast of the skeleton to London. It was unveiled at the Natural History Museum on May 12th, 1905, to great fanfare. Prior to the first World War Carnegie had subsequent specimens were donated across Europe, From Paris, to Berlin, St.Petersburg, and Vienna just to name a few.
The skeletons across Europe captivated the public and fueled images of a time when reptiles dominated the planet. Carnegie donating these skeletons across the globe helped make the word "Dinosaur" a household name. According to his great-grandson, "By gifting copies to the heads of state of seven other countries as well as the UK, Carnegie hoped to demonstrate through mutual interest in scientific discoveries that nations have more in common than what separates them. He used his gifts in an attempt to open inter state dialogue on preserving world peace – a form of Dinosaur diplomacy."
In 2016, a petition was posed to the ICZN (International Commission on Zoological Nomenclature) to change Diplodocus carnegii as the type species of Diplodocus. Mainly because subsequent studies have determined that Diplodocus longus is actually a nomen dubium (a dubious name) and most of the material is either assigned to Diplodocus hallorum and/or to Morrison sauropods. However, the ICZN ultimately rejected the petition and Diplodocus longus remains the type species despite its dubious nature.

Description:

In terms of appearance, Diplodocus carnegii is average size for a sauropod. Just over 70ft long with potential specimens reaching 85ft long and weighing in at only 17-22 tons. Smaller to its sister species Diplodocus hallorum (AKA Seismosaurus), which is at least a third bigger in terms of size, though it was not the smallest of all sauropods of the Morrison Formation.

Habitat and Competition:

Fossils of this species have been found in Wyoming predominantly. However, it's likely that they were around in other areas like Utah and Colorado as its possible that some fragmentary remains of Diplodocus longus could belong to it. It would have shared the environment with Jurassic icons like Brontosaurus, Stegosaurus, and Camarasaurus. It also lived with a variety of predators like Allosaurus, Torvosaurus, and Ceratosaurus. These predators would have been more than capable of preying upon juvenile sauropods.

The environment of the Morrison Formation was a floodplain environment with lowland swamps and vast fern prairies with cycad and horsetail being the primary flora in the region. Conifers such as redwoods and monkey-puzzle trees are among the predominant conifer trees in the area. The trees and ferns would have been the primary browsing material for sauropods like Diplodocus and its kin. As far as how long these animals lived, they were only around for 2,000,000 years from 154-152,000,000 years ago, based on the rocks where the fossils were collected.

Rearing Behavior:

A trend commonly seen in Paleoart is sauropods rearing up on their hind legs to feed on taller trees. While definitely an awe-inspiring sight to behold in paleoart, was this actually possible for them to achieve? Recent studies have found support for this theory in most diplodocids across the board. For one, for a third of the way down the tail, bottom chevrons are strangely boat-shaped, perhaps used to provide support for the animal as it used its tail as a prop. Furthermore, the center of mass was placed near the hind limbs, an ideal position for the animal to rear up. So it's possible that these diplodocids could have reared up.

Diet and Feeding:

Like all Sauropods in the Late Jurassic, Diplodocus carnegii was a herbivore. Its skull was equipped with peg-like teeth and they were believed to be used to strip plant material from horsetail, conifers, or ferns. Many paleontologists have theorized that diplodocids used unilateral branch stripping to feed. One row of teeth would grab the stem of the foliage, and the other would guide the stripping of the plants. They would then swallow down the plant matter and have it digest in their massive gut, no pre-processing of the food (chewing) would occur in the mouth. All processing of its food would occur in its massive gut.

Diplodocus carnegii helped make dinosaurs famous the world over. Odds are, if you've gone into a museum somewhere in the world, you have seen casts of this incredible dinosaur. Although it's long-extinct, its reputation is anything but.
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Another iconic Sauropod. I decided since I had a base Diplodocid model, I'd write up one of the most famous dinosaurs in the Morrison Diplodocus carnegii. I ALSO updated my old Diplodocus hallorum if you want to check it out. I did copy and paste some sections from this profile to that, but, it's basically the same aside from a different skin so, I don't see the need to drastically change it.
Diplodocus hallorum Profile by Davidy12 on DeviantArt

Personal Angle: While I've never seen actually been to the Carnegie Museum, I have seen two casts of Dippy in both London and Berlin. The Berlin mount is just awesome as it's standing right next to Giraffatitan and Kentrosaurus.

Changes made, pretty much I took the Barosaurus model prior to modifying its head and skull, neck, and tail and altered the skin and boom, got a Diplodocus carnegii.

The skin most of it is my own design but, I did take some inspiration from DenerDPaleoarts and his Diplodocus
Diplodocus by DenerDPaleoarts on DeviantArt

Now, while this won't be in Past Meets Present since I already went to the Jurassic, the model will function as Diplodocus hallorum. The main difference is just an altered skin, since as I said, aside from size, their isn't much of a difference because they are the same genus.

For Past Meets Present:
Past Meets Present (Pt4 is Up) - Page 2 - The ZT2 Round Table

Original model by DinosaurManZT2 modified by me:
Diplodocus (HENDRIX) | ZT2 Download Library Wiki | Fandom

Description
Diplodocus carnegii

Sauropod dinosaurs are among the most iconic creatures that have ever walked the planet. These awesome creatures became prevalent in the Early Jurassic and died out at the end of the Cretaceous period. Bar-none, the most famous was Diplodocus, specifically Diplodocus carnegii.

History:

In Wyoming in early 1898, a femur was recovered. In December of that same year, the animal's thigh bone was described and shown in the New York Journal-American newspaper article. Andrew Carnegie saw the article and had the Carnegie Museum's curator, William Holland contract Paleontologist John Bell Hatcher to try and recover more of the skeleton. Eventually in 1899, they recovered the rest of the torso, about a quarter of the tail and most of the neck. As far as Sauropod skeletons go, this was a relatively complete specimen. They were subsequently taken back to Philadelphia where paleontologists tried to fill in the gaps. In 1901, Hatcher described the specimen as a new species of Diplodocus, and he called it "Diplodocus carnegii". The genus name means "Double-Beam" in Greek and Carnegii after Andrew Carnegie himself as he helped fund the expeditions out to Wyoming.
The specimen: CM 84 was put on display at the Carnegie Museum of Natural History in 1907. It has also been dubbed "Dippy" for obvious reasons.
However, this skeleton would make the word "dinosaur" famous the world over. Prior to it even being on display, in 1902, King Edward VII saw a sketch of the bones at Andrew Carnegie's Home. After the King had some discussion with the wealthy American philanthropist, Carnegie agreed to donate a cast of the skeleton to London. It was unveiled at the Natural History Museum on May 12th, 1905, to great fanfare. Prior to the first World War Carnegie had subsequent specimens were donated across Europe, From Paris, to Berlin, St.Petersburg, and Vienna just to name a few.
The skeletons across Europe captivated the public and fueled images of a time when reptiles dominated the planet. Carnegie donating these skeletons across the globe helped make the word "Dinosaur" a household name. According to his great-grandson, "By gifting copies to the heads of state of seven other countries as well as the UK, Carnegie hoped to demonstrate through mutual interest in scientific discoveries that nations have more in common than what separates them. He used his gifts in an attempt to open inter state dialogue on preserving world peace – a form of Dinosaur diplomacy."
In 2016, a petition was posed to the ICZN (International Commission on Zoological Nomenclature) to change Diplodocus carnegii as the type species of Diplodocus. Mainly because subsequent studies have determined that Diplodocus longus is actually a nomen dubium (a dubious name) and most of the material is either assigned to Diplodocus hallorum and/or to Morrison sauropods. However, the ICZN ultimately rejected the petition and Diplodocus longus remains the type species despite its dubious nature.

Description:

In terms of appearance, Diplodocus carnegii is average size for a sauropod. Just over 70ft long with potential specimens reaching 85ft long and weighing in at only 17-22 tons. Smaller to its sister species Diplodocus hallorum (AKA Seismosaurus), which is at least a third bigger in terms of size, though it was not the smallest of all sauropods of the Morrison Formation.

Habitat and Competition:

Fossils of this species have been found in Wyoming predominantly. However, it's likely that they were around in other areas like Utah and Colorado as its possible that some fragmentary remains of Diplodocus longus could belong to it. It would have shared the environment with Jurassic icons like Brontosaurus, Stegosaurus, and Camarasaurus. It also lived with a variety of predators like Allosaurus, Torvosaurus, and Ceratosaurus. These predators would have been more than capable of preying upon juvenile sauropods.

The environment of the Morrison Formation was a floodplain environment with lowland swamps and vast fern prairies with cycad and horsetail being the primary flora in the region. Conifers such as redwoods and monkey-puzzle trees are among the predominant conifer trees in the area. The trees and ferns would have been the primary browsing material for sauropods like Diplodocus and its kin. As far as how long these animals lived, they were only around for 2,000,000 years from 154-152,000,000 years ago, based on the rocks where the fossils were collected.

Rearing Behavior:

A trend commonly seen in Paleoart is sauropods rearing up on their hind legs to feed on taller trees. While definitely an awe-inspiring sight to behold in paleoart, was this actually possible for them to achieve? Recent studies have found support for this theory in most diplodocids across the board. For one, for a third of the way down the tail, bottom chevrons are strangely boat-shaped, perhaps used to provide support for the animal as it used its tail as a prop. Furthermore, the center of mass was placed near the hind limbs, an ideal position for the animal to rear up. So it's possible that these diplodocids could have reared up.

Diet and Feeding:

Like all Sauropods in the Late Jurassic, Diplodocus carnegii was a herbivore. Its skull was equipped with peg-like teeth and they were believed to be used to strip plant material from horsetail, conifers, or ferns. Many paleontologists have theorized that diplodocids used unilateral branch stripping to feed. One row of teeth would grab the stem of the foliage, and the other would guide the stripping of the plants. They would then swallow down the plant matter and have it digest in their massive gut, no pre-processing of the food (chewing) would occur in the mouth. All processing of its food would occur in its massive gut.

Diplodocus carnegii helped make dinosaurs famous the world over. Odds are, if you've gone into a museum somewhere in the world, you have seen casts of this incredible dinosaur. Although it's long-extinct, its reputation is anything but.
___________________________________________________________________________________________
Another iconic Sauropod. I decided since I had a base Diplodocid model, I'd write up one of the most famous dinosaurs in the Morrison Diplodocus carnegii. I ALSO updated my old Diplodocus hallorum if you want to check it out. I did copy and paste some sections from this profile to that, but, it's basically the same aside from a different skin so, I don't see the need to drastically change it.
Diplodocus hallorum Profile by Davidy12 on DeviantArt

Personal Angle: While I've never seen actually been to the Carnegie Museum, I have seen two casts of Dippy in both London and Berlin. The Berlin mount is just awesome as it's standing right next to Giraffatitan and Kentrosaurus.

Changes made, pretty much I took the Barosaurus model prior to modifying its head and skull, neck, and tail and altered the skin and boom, got a Diplodocus carnegii.

The skin most of it is my own design but, I did take some inspiration from DenerDPaleoarts and his Diplodocus
Diplodocus by DenerDPaleoarts on DeviantArt

Now, while this won't be in Past Meets Present since I already went to the Jurassic, the model will function as Diplodocus hallorum. The main difference is just an altered skin, since as I said, aside from size, their isn't much of a difference because they are the same genus.

For Past Meets Present:
Past Meets Present (Pt4 is Up) - Page 2 - The ZT2 Round Table

Original model by DinosaurManZT2 modified by me:
Diplodocus (HENDRIX) | ZT2 Download Library Wiki | Fandom