Here's an info sheet on Vinecers, an original alien species I developed quite some time ago.
Much of this info is outdated now. An updated reference sheet can be found here:
https://www.weasyl.com/~oddymcstrange/submissions/2176557/updated-vinecer-reference-sheet
Link
2n2n
I really like the regurgitation detail! It's an efficient solution for a species with no other way to expel waste, to still have an emergency exit! I love the rock-eating as well.... it sounds like it'd feel so satisfying to feel the rocks dissolve in the mouth into the gritty constituent parts. I wonder if individuals would have personal preferences for types of rocks or stones, or where gemstones or metals would sit on the palate... and if some very hard gems would be possible to dissolve too, or if there's a limit (like a scientist trying to give one a diamond)