Aaaah yes another UniRex and a pretty one!
Seeing as you're the only other one with a UniRex I was also wondering about asking you what you thought of that species ref and if you had any ideas for expanding on them as a species.

I was unable to find the species ref, so I just kind of winged it. I'm curious, though, if the species was comprised of only females and upon maturity their wombs would automatically start producing young, it would help them repopulate, right? If there were males, though, I think it'd make sense for them to (potentially) have a womb for use if necessary, enabling mpreg for them(but only in a few rare cases).

It's right here http://www.furaffinity.net/view/13589106/ very basic and a lot needs changing though.
Something like that would certainly keep the species going!

Having a look at it, it looks very well-done. There doesn't seem much done o expand on the reproductive systems. Also, an idea for the horns: Perhaps some would have some horns on the front of the snout? I imagine it'd be a mutation, though.

Well it was very much a 'basic' reference. I feel like more should be done with the horn to make it unique seeing as a species they're just alightly-anthro dinosaurs with horns on their head which isn't very creative.
I imagine their horn would stay primarily at the back of the head but ones on the snout would be more rare/mutant territory.

Alright.

Perhaps some would have extended claws? I imagine that that could be a mutation as well.

So A re-make of said reference is in the works somewhere...

Unless they're retractable it would definitely be a mutation, given their unfortunately short arms long claws/nails would probably make things awkward for them.

I could imagine the common members of the species having the longer, retractable claws normally, to help them reach stuff.

Well longer fingers would be better there than longer claws. Longer claws would be better in fights and for digging into things though.

Well, yeah, but longer fingers would be unwieldy especially since they only have two fingers on each hand, and no opposable thumbs.

True, not all of them have a thumb-spike which isn't an amazing replacement but helps.