Carnegie Museum - Part 2

The Jurassic hall is the oldest part of CMNH’s dinosaur display, the huge Diplodocus carnegii being the museum’s first dinosaur. This part of the hall has been updated with newer fossils since then, offering an impressive collection of Morrison fauna (and others). Across from the Diplodocus is its smaller cousin Apatosaurus, plus a juvenile underneath. Nipping at its tail is a possibly unwise Allosaurus.

Around the edge with the mural one finds the ornithischians represented as well, with Stegosaurus and Uteodon. Above the latter is a small mounted pterosaur, probably Pterodactylus by the looks of it.

Speaking of whom, there is a cast of the original Pterodactylus antiquus specimen nearby, along with that of the first full Archaeopteryx from Solnhofen.

Around the corner, one crosses over into the Cretaceous and, conveniently, a separate post.

I saw people sharing their ‪#‎BuildaBetterFakeTheropod‬ creations so here’s mine! ‘Monstrumtenebris colossus
Since the Indominus is the product of splicing, I thought it’d be neater to make the mix more apparent. So here’s a heavier, larger Allosaurid (with lots of Carnotaur there) spliced with Dunkleosteus because why not?

Megaraptor namunhuaiquii


NameMegaraptor namunhuaiquii 

Name Meaning: Giant Thief 

First Described: 1998

Described By: Novas 

ClassificationDinosauria, Saurischia, Theropoda, Neotheropoda, Averostra, Tetanurae, Orionides, Avetheropoda, Coelurosauria, Tyrannoraptora, Tyrannosauroidea, Megaraptora

This member of Megaraptora, besides being another dinosaur with my name besides Megalosaurus, is actually the reason megaraptors are called raptors. A giant buzz was made about this dinosaur when it was first discovered because it was originally described as a huge dromeosaur, thinking its giant hand claw was actually a dromaeosaurid foot claw. And it would have been a huge dromaeosaurid - at two meters tall and eight meters long. However, when more remains were found it was quickly reclassified, as it was made clear that the claw actually belonged on its forelimb. It was then classified as a spinosaurid, as that type of claw is common in that group, but then new discoveries in Australia revealed that it was actually a specialized allosaurid. Since that, however, the Megaraptors have been reclassified again as tyrannosauroids. It was from the Coniacian stage of the Late Cretaceous, about 98 million years ago, and was found in Patagonia, Argentina. 


Shout out goes to microraptors!

Australovenator wintonensis was one of a theropod clade known as Megaraptora, which has been at the center of a number of taxonomic realignments in the past couple years. Current analyses place them within Tyrannosauroidea, so although the matter is far from resolved; here they are.

Australovenator first achieved notoriety (albeit not in its own guise) as the ‘Polar/Dwarf Allosaur’ of Walking With Dinosaurs. Known only from ankle material at the time, it wasn’t until further analyses and the description of more material that it was found to be entirely distinct from the allosaurid lineage. It is part of a radiation within the megaraptoran clade which includes the other Australian megaraptoran Rapator and the Japanese Fukuiraptor. The holotype was popularly nicknamed 'Banjo’, after Australian folk lyricist Banjo Paterson, the author of “Waltzing Matilda”.

A gracile carnivore, Australovenator seems to have measured in at about 20 feet (6 meters) in length, its most obvious means of hunting being the large claws on each hand. Its fossils are known from the Aptian-Cenomanian Winton Formation, which represents a river delta/estuarine environment at the extremity of what then would have been the great inland Eromanga Sea.

Epanterias amplexus


NameEpanterias amplexus 

Name Meaning: Buttressed vertebrae

First Described: 1878

Described By: Cope 

ClassificationDinosauria, Saurischia, Eusaurischia, Theropoda, Neotheropoda, Averostra, Tetanurae, Orionides, Avetheropoda, Carnosauria, Allosauroidea, Allosauria, Allosauridae 

Epanterias is a dubious allosaurid genus given that it was discovered quite a long time ago and the material has been reclassified again and again. It was from the Kimmeridgian-Tithonian age of the Late Jurassic in the Morrison Formation of Colorado, dating about 146.8 million years ago. Cope originally thought it was a sauropod, however later it was described as a large species of Allosaurus, but it has been called both a large individual of A. fragilis as well as its own genus, E. amplexus. Regardless, it was 11 meters long and weighed 3 to 5 tons, as big as Tyrannosaurus. Until more material is found, we don’t know much about this animal. 


Shout out goes to chavinho11!

Saurophaganax maximus


NameSaurophaganax maximus 

Name Meaning: Largest Lizard-Eating Master 

First Described: 1995

Described By: Chure 

ClassificationDinosauria, Saurischia, Theropoda, Neotheropoda, Averostra, Tetanurae, Orionides, Avetheropoda, Carnosauria, Allosauridae

Saurophaganax was a large allosaurid from the Morrison Formation of Oklahoma, from the Kimmeridgian stage of the the Late Jurassic, 151 million years ago. This makes it a contemporary of Allosaurus, and it is considered widely in the paleontological community to be a species of Allosaurus. It was a huge theropod, about 13 meters long. New material of the species from New Mexico has been uncovered, which might allow for its taxonomic relationship with Allosaurus to be cleared up. It was one of the largest carnivores of the area, bigger than both Allosaurus and Torvosaurus, making it a formidable foe and a potential apex predator. It was so large that if it had lived in the Cretaceous it would have rivaled both Tyrannosaurus and Giganotosaurus. However, this means it was much more rare than Allosaurus, given its need for more prey, as evidenced by the small amount of fossil material for it. It might have also been slower due to its size, forced to scavange rather than hunt, which is plausible given the prevalence of Allosaurus in the area. However the most likely idea is that it both hunted and scavanged, opportunistic in its need to gather as much food as possible. Given the numerous large herbivorous dinosaurs at the time - especially sauropods - this probably wouldn’t have been much of a problem.


Shout out goes to rknickme