figure this maybe the best group to ask this in. For my Sword Mare story I have a race or sub race of mountain drelling ponies. The basic idea is a pony version of a Dwarf that dig mines and forge metal with Iron covered hooves. I'm wondering if there is an officel name for a type of pony that lives underground.

If you are wondering I already have an Elf Pony speices I called Elfens. If I can't come across any better names I'm going to call my Dwarf Pony speices Dore. Ther isn't any good reason why, I wanted something that begain with a D and the word Dwarf and I like the sound of the word Drow (Under ground Dark Elves).

Call them Mules, Asses, Jackasses, Donkeys, or some other variant!

2730836 Other than changelings, there doesn't seem to be any.
Unless you believe that Hades is a place underground, in which case the Pyrippus counts, but they drew the chariot of Hades and didn't really dig.

3272231 Kind of late to use that for the underground ponies then again I did a story with creature the Dore called Dark Dore. I could have other speices call Dark Dore Pyrippus.

3272295 Sounds interesting.

equum terram