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Megalosaur interrupted

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By ScottHartman   |   
Published: March 8, 2014
© 2014 - 2020 ScottHartman
As a general rule most books sort of gloss over the transition from basal coelophysoid or ceratosaurian grade theropods to allosaurids, but megalosaurs are actually a fascinating bunch. They not only rose to prominence during the Middle Jurassic, but they continued to compete in the Northern Hemisphere alongside sophisticated allosauroids, and managed an impressive Cretaceous radiation (as spinosaurids). Sadly a lot of these specimens are not terribly complete, so if we want to restore them we need to do a lot of gap filling.

Torvosaurus is actually surprisingly complete once all of the referred specimens are accounted for (mercifully they also have quite a bit of overlap between material, so cross-scaling isn't such a challenge). So perhaps not surprisingly that's what was used to help fill out Megalosaurus and the new T. gurneyi.

Marshosaurus is too far from Torvosaurus to use it, so instead Condorraptor and Piatnitzkysaurus stood in. Also, to be fair to the megalosaurs and the completeness issue some of the more basal taxa like Eustreptospondylus and Piatnitzkysaurus are more complete, but I haven't got to them (yet!).
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anonymous's avatar
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Ladymedusa218's avatar
Ladymedusa218Hobbyist General Artist
megalosaurs descended into spinosaurs??? wow ive never heard of that!!!what "links" would be between these two?? also is it thought that maybe the bones of megalosaurus may actually be juvenile torvos??? well i guess actually it would be megalosaurus that would be the correct genus name since it was named first. id love to know the details about all of this :) 
ScottHartman's avatar
ScottHartmanProfessional Digital Artist
Since I'm sort of swamped atm I'll point you to the appropriate Wikipedia page: en.wikipedia.org/wiki/Megalosa… Not only does it have some fairly recent family trees, but if you meander down towards the works cited at least one paper is available to download (and it has all the characters).

The easiest not-so-technical characters to see are a very large thumb claw, and an elongated head (sure, it's taken further in spinosaurids, but megalosaurs also have long heads).
Asuma17's avatar
Asuma17Hobbyist General Artist
Come to pass the Torvosaurus seems to pretty well complete though I still can't see why it is so rare and plus on that Marshosaurus too and I wish they'd find more fossils of Megalosaurus it's been incomplete for so long and it was the first dinosaur ever discovered!
Asuma17's avatar
Asuma17Hobbyist General Artist
No Megalosaurus was discovered first and then Iguanodon came second. William Buckland and other paleontologists had found bones of Megalosaurus in the Limestone Quarries since the 1700's back then it was first named Scrotum and over the future generations it would go by many variations of it's name and species. Iguanodon was found by Gideon Mantell's wife in 1822 that's 59 years after Megalosaurus' discovery and naming. If your trying to bolster your knowledge and correct some one who knows a lot more about his dinosaur knowledge just to make yourself seem better then you are sorely mistaken ~Seto Kaiba (This is boring) [V1] 
Asuma17's avatar
Asuma17Hobbyist General Artist
Well you always try to and correct me with every single thing I write in my comments you and acepredator like the debate the Quetzalcoatlus and attacking it's prey swooping down at them or being scavengers as well like Vulture. Only reason why say that is because you keep annoying and I do know a little more about dinosaurs I'm no pushover and I take my studying and recaps very seriously and have take the potential to do so. If you want to talk about pretentious and being bully-ish than look in the mirror cause you always did to me and were sometimes high in ignorance beyond belief.

And how have you known about dinosaurs? like for 10 years or something? I've known about dinosaurs for 18 years now going on 19. For a person who knows over 1000 prehistoric animals all in one setting for 18 years...guess who wins? Maybe you should take more of the time learn from your own lessons, Just know that you...Paleo-hypocrite.Ciel Phantomhive (Serious Look) [V1] 
captainjimmbob's avatar
ew.




Both of you, quiet.


The first dinosaur found was not Megalosaurus or Iguanodon.

Dinosaurs have been found for thousands of years and create the legends of dragons. Even if you don't count those times, a dinosaur found in the 1600's was named "Rutellum implicatum," and it was a sauropod, possibly the same as Cetiosaurus . The name is too old to be considered an actual dinosaur name, but it is technically the first dinosaur to be documented.
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Asuma17's avatar
Asuma17Hobbyist General Artist
Seijirou Kikuoka (Explanation) [V2] In way you still bullied me, your criticism isn't exactly saintly. Byakuya Togami (Serious Talk) [V1] And I do know a little bit more about dinosaurs and that doesn't have to do with arrogance that is just what I'm pointing out and Masato Inohara (Burning Spirit) [V2] I'm not hesitant to say so, you always seem to questioning my knowledge on dinosaurs with your criticism, but I try to tell you what is correct or is probable solution, but your ignorance is rampant to the point where you think I showing arrogance. Sorry pal that's not what is happening here despite my comment earlier.yu yu hakusho gif Hiei 

And yes I do remember actually and I had a right to say so since your ignorance was so beyond point where you refused to believe me and as I told you before that Carnotaurus was from the Upper Late Cretaceous period and Talenkaun both lived during that same stage of the period, but you refused to believe it and kept looking upon your own beliefs (which okay, but not good your defense) and was getting to the point you frustrated me. As I mentioned I also said AcePredator another Deviantmember who just like always tries to correct me in everything that involves dinosaurs, if anything I like to know how much you study on dinosaur in regular basis and if you say your corrections were pure then why didn't you just look up the dinosaurs yourself when had the conversation to get a recap on what we discussed. That's the problem you didn't in other words pure ignorance...Sayu Hmph Icon 
Megalotitan's avatar
MegalotitanHobbyist Digital Artist
Ummm...... WTF? You're saying that Carnotaurus and Talenkauen were NEIGHBORS?! WTF?!
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Jeda45's avatar
What do you think of nasal crests/ridges in megalosauroids? Dennonyx says that it's parsimonious to assume that they had them, since most basal members of "carnosaur-grade" (Ceratosauria, Allosauroidea, Tyrannosauroidea) lineages had them. I'm especially interested in piatnitzkysaurids, so I can make my Marshosaurus reconstruction as accurate as possible.
On a related note, did they have lacrimal horns?
thediremoose's avatar
I'm curious. The specimen of Marshosaurus from the Carnegie Quarry included the back of the skull, the cervicals, and the first five dorsals (which are shown) but also a scapula and partial humerus (which are not). Is the forelimb material no longer considered part of that specimen?
Dennonyx's avatar
Dennonyx Traditional Artist
^agree
Ezekiel-Black's avatar
Awesome, I love Torvosaurus. Maybe this is a sign for me to do more dino drawings.
ScottHartman's avatar
ScottHartmanProfessional Digital Artist
It's definitely a sign.
asacquaf's avatar
Where does Edmarka come in on this scale?
ScottHartman's avatar
ScottHartmanProfessional Digital Artist
Edmarka is just another specimen of Torvosaurus, so its remains have been included already (and the skeletals are not to scale).
Kazuma27's avatar
Kazuma27Hobbyist General Artist
What?!
And i thought we had at least one complete megalosauridd arm :P
ScottHartman's avatar
ScottHartmanProfessional Digital Artist
Well we have the arm of Torvosaurus, just not all of the wrist and hand.
thedinorocker's avatar
I recently saw your (modified) skeletal of T.gurneyi on the paper!
ScottHartman's avatar
ScottHartmanProfessional Digital Artist
Indeed :)
anonymous's avatar
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