I recently asked a question regarding whether or not a fictional theropod dinosaur-like creature I created could feasibly raise and lower its head which sported a number of large horns.

I received what strikes me as an excellent and plausible answer: the suggestion that I give the creature a thoracic hump, like the kind you would find on a horned mammal like a bull, ox, or elk. As I understand it, the size of the hump would depend on the weight of the head. A heavier head would need more powerful muscles to lift and lower it, which in turn need larger spinal processes to connect to, hence the hump. Here's an example of an animal with the sort of hump I'm talking about. example of animal with hump

Before I commit to the inclusion of this feature on my animal, however, I was wondering if anyone had any scientific objections to the presence of a thoracic hump on a theropod dinosaur (if it would be incompatible with the arrangement of the creature's muscles or something like that). I just noticed that no dinosaurs seem to have this feature and I'm essentially looking for a second opinion.

This is the revised creature tentatively sporting the hump. the creature in question


The hump would be above the pivot point

The impression I get from your picture is that you are imagining the hump to be above the front legs. That wouldn't make sense, the hump in a moose, for example, is directly above legs in ground contact, so the muscles for moving the head have leverage. The hump, if any, in a two legged dinosaur would similarly be above legs in ground contact, which would be the back legs.

In fact, Ortega, F., et al, 2010 published their discovery of a humped therapod Concavenator corcovatus. Check out page 204 for a picture.


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