Snakes.
If you hadn't, I would've.
Lamannia gets anything more primal/animalistic than fey, out of the 'wild' subset of critters. Plus all the elementals, minus fire elementals. Go wild, literally.
Fernia? Anything with the Fire subtype. (including those leftover fire elementals) (Handy monster-making assist? Anything fire (on Fernia) or cold (on Risia) subtyped, swap fire and cold effects to get their counterpart from the other plane. Frost salamanders, fire salamanders, fiery balors, frosty balors.. It works!)