oviraptorosaurs

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American Museum of Natural History, Part 4: The Birds are Dinosaurs Exhibit, part 1: Chickenparrot Models

I took a lot of photos of the “Dinosaurs Among Us” Exhibit for obvious reasons. Those obvious reasons are:

1. Thank god this exits 
2. I cried. I openly wept when I went through this. And I went through it three times. I openly wept each time. 

Anyways here’s part one: Chickenparrot Models. @bruh-i-nevre-seen-a-cooler-dino

gonna be a cool kid and post my choices

Basal Theropods - Herrerasaurus, because it is old and cool


Ceratosaurs - Majungasaurus because its planet dinosaur sequence was rad


Basal Tetanurans & Megalosaurs - Irritator, because that name is hilarious

Carnosaurs - Aerosteon idk its name is cool

Miscellaneous Coelurosaurs - Sciurumimus SQUIRREL MIMIC IT HAD A SQUIRREL TAIL

Tyrannosauroids - Appalachiosaurus lived close to me and i like that


Ornithomimosaurs - struthiomimus, because ostriches are cool and also when i wake up first thing i do

eggs


Alvaresaurs
- Albertokynus little due in north america


Therizinosaurs - Nothronychus what ever was this thing


Oviraptorosaurs - Gigantoraptor because she big


Dromaeosaurs - Buitreraptor because i like it ok


Troodontids & Basal Avialans - it is old and also cute


Enantiornithes - Iberomesornis so tiny


Non-Neornithean Euornithes - Candaga like hesperornis but BIG

Dinosaur March Madness 2k17: Stinkin’ Theropods

A bunch of other people were listing their choices so I figured hey why not, I haven’t jumped on a bandwagon in a while

  • Non-Averostran Theropods: Daemonosaurus, for having a cool name and a cool skull
  • Ceratosaurs: Ceratosaurus, because tbh I think it’s a little underappreciated and we should all cherish it
  • Basal Tetanurans & Megalosaurs: Spinosaurus, because I’m a basic bitch
  • Carnosaurs: Giganotosaurus (see above)
  • Miscellaneous Coelurosaurs: Scipionyx, my man, the little Italian friendo
  • Tyrannosauroids: Dryptosaurus, clearly the best dinosaur known from woefully incomplete remains, is a Jethro Tull species if you squint hard enough, go Jersey etc. etc.
  • Ornithomimosaurs: Struthiomimus, because Duck Satan was last year
  • Alvarezsaurs: Albertonykus, because if you don’t get the joke yet why are you even still here
  • Therizinosaurs: Beipiaosaurus, for dint of being charmingly menacing and floofy
  • Oviraptorosaurs: Gigantoraptor, because if we can’t have Duck Satan then Chicken Satan will begin its reign
  • Dromaeosaurs: Zhenyuanlong, because why let Dakotaraptor have all the fun
  • Troodontids & Basal Avians: Sapeornis, for the exact same reason that archosaurophilia gives
  • Enantiornithes: Gobipteryx, because palates
  • Non-Neornithean Euornithes: Baptornis, because it’s objectively better than Hesperornis. Fight me
My picks for Dinosaur March Madness

Basal Theropods - Herrerasaurus (I think its just iconic in general, man)

Ceratosaurs - Masiakasaurus (THAT JAAAAAAAAW)

Basal Tetanurans & Megalosaurs - Megalosaurus (my teacher used to call me this so call it a biased vote or whatever)

Carnosaurs - Carcharodontosaurus (inherently cool)

Miscellaneous Coelurosaurs - Fukuivenator (japanese theoropods are neat)

Tyrannosauroids - Guanlong (because the slender early tyrannos need love too)

Ornithomimosaurs - Gallimimus (oblig. jurassic park vote)

Alvaresaurs - Parvicursor (a rms????)

Therizinosaurs - Beipiaosaurus (its cute and its shaped like a friend)

Oviraptorosaurs - Gigantoraptor (big)

Dromaeosaurs - Tsaagan (totally not voting because i have a miraculous kwamin oc named after this thing nope nope nope nope)

Troodontids & Basal Avialans - Mei (known from a specimen fosssilized in sleeping position how neat is that)

Enantiornithes - Avisaurus (ngl picked this one based on which potential nominee had the nicest artwork)

Non-Neornithean Euornithes - Hesperornis (penguin v0.1)

Macroelongatoolithus

Macroelongatoolithus is a genus of dinosaur egg known from the Cretaceous of North America and China. THese large eggs are at least 34 cm long by 11 cm wide, but some can be over 60 cm long. They are usually three times longer than they are wide and are found in large clutches of up to 26 eggs. They usually form a ring, about 2 to 3.3 meters in diameter. The eggs themselves are about 1.38 to 4.75 mm thick, and the eggs are divided into two distinct layers. They were laid by individuals with two oviducts, and the large numbers of eggs found at nesting sites probably indicate that they were cared for by multiple individuals. 

They were probably laid by gigantic oviraptorosaurs, and not tyrannosaurs as previously thought, since their structure resembles eggs laid by Citipati; Gigantoraptor is a strong contender for laying some of the eggs found in Asia. Furthermore, baby skeletal remains nicknamed Baby Louie were found in one specimen of this oogenus which strongly resembled Oviraptorosaurs. This indicates that there was probably a genus of large Oviraptorosaur in North America, though a skeleton of such has not been found.  

Source:

https://en.wikipedia.org/wiki/Macroelongatoolithus

Shout out goes to @omegamorph!

wirehead-wannabe  asked:

Why would a T-Rex or a velociraptor have tiny wings as shown in the picture you linked? Obviously they aren't for flying. Did they both descend from flighted species?

That is actually a theory that some paleontologists have put forth.  The most primitive known dromaeosaur, Microraptor, was capable of gliding, or possibly even powered flight; some paleontologists believe that dromaeosaurs were descended from flying animals, but became secondarily flightless in order to hunt larger prey on the ground.

However, there are other theories as to why these dinosaurs would have had wing-like arm feathers.

  • They were used to assist in incubating eggs and shielding the young from the elements.
  • They were used as display structures to attract mates or frighten away predators.
  • They were used for balance while restraining prey.
  • They were used for wing-assisted incline running.
  • They were vestigial in adulthood, but babies and juveniles used them to glide or fly and escape from predators.

I personally think that many of these explanations are plausible, but I don’t necessarily believe the “flying common ancestor” theory.

The only dinosaurs known to have possessed long, wing-like feathers on their arms are dromaeosaurs, ornithominosaurs, and oviraptorosaurs.  All three of these dinosaur types are coelurosaurian theropods, with the dromaeoaurs and oviraptorosaurs belonging more specifically to the subgroup Maniraptora, along with therizinosaurs, scansoriopterygians, and troodontids.  These other maniraptorans show no evidence of wing-like feather arangements, which seems strange, given that if dromaeosaurs evolved from flying ancestors, their closest relatives would have had to as well.

I think that wing-like feather arrangements evolved in ground-dwelling theropods first, perhaps for some of the purposes listed above, such as the protection of young or mating display.  I also think that they evolved separately numerous times among different theropod groups, and only led to flight in the dromaeosaurs.

My entire life is spent tripping over myself as I struggle between just telling people “I like dinosaurs” or going into an exhaustive, week-long explanation on the three billion years of cool prehistoric life that isn’t dinosaurs

Did you know? Dinosaurs never really vanished from Earth. Most did go extinct, but their evolutionary legacy lives on all around us, in birds. The Museum’s new exhibition Dinosaurs Among Us will highlight the unbroken line between the charismatic dinosaurs that dominated the planet for about 170 million years and modern birds, a link that is marked by shared features including feathers, wishbones, enlarged brains, and extremely efficient respiratory systems. Pictured is an Oviraptorosaur, a cousin to the T.rex but a closer cousin to modern birds. 

Purchase a Museum membership and enjoy an exclusive opportunity to see the new exhibition Dinosaurs Among Us on March 18-20, before it opens to the public.

Learn more about Member Preview Days.

Get a glimpse into the past with this remarkable Fossil Friday. 

Pictured is an oviraptorosaur embryo, and had it hatched, this embryo would have grown into a type of theropod dinosaur. Its head is tucked toward its knees, a position found in embryos today. This dinosaur embryo, a cast of which is in the exhibition, is the first ever found in which the bones were still in place. 

See many more fossils and models in the new exhibition, Dinosaurs Among Us, now open. 

AMNH/R.Mickens

Hagryphus giganteus

By Ashley Patch on @apatchsketches

Name: Hagryphus giganteus 

Name Meaning: Ha’s griffin

First Described: 2005

Described By: Zanno & Sampson

ClassificationDinosauria, Saurischia, Eusaurischia, Theropoda, Neotheropoda, Averostra, Tetanurae, Orionides, Avetheropoda, Coelurosauria, Tyrannoraptora, Maniraptoriformes, Maniraptora, Pennaraptora, Oviraptorosauria, Caenagnathoidea, Caenagnathidae

Hagryphus was another oviraptorosaur from the Kaiparowits Formation in the Grand Staircase-Escalante National Monument in Utah. It lived in the Campanian age of the Late Cretaceous, about 75.95 million years ago. It is only known from scattered remains but it was a particularly large oviraptorosaur, about 3 meters long. It lived near the Western Interior Seaway, in an floodplain with large channels and wetland peat swamps, ponds and lakes, and boarderd around by highands. It lived in a wet and humid climate alongside many other types of dinosaurs: dromaeosaurids, Talos, Ornithomimus, Albertosaurus, Teratophoneus, ankylosaurids, Parasaurolophus, Gryposaurus, Utahceratops, Nasutoceratops, and Kosmoceratops. 

Source: 

http://en.wikipedia.org/wiki/Hagryphus

Shout out goes to virtualdeveloper!