Small, slow-moving insects with large porous mushrooms affixed to their backs. They are able to spew an acidic cloud that damages equipment. Certain rings mention that they can break easily and it is those who break in a matter of a few seconds if exposed enough to the cloud. Either remove them temporarily and re-equip them after the threat has been dealt with or exercise even more caution.
It is best to take them out at a distance with ranged weapons or spells to avoid the acid cloud they emit. Also, there is a delay when they releasing the acid loud, so you could attack them with melee weapons and back out before they finish releasing the fume if you don't favor ranged combat.
Like Poison Horn Beetles, they can perform a headbutt at close range. Whilst the damage is minimal, the stun effect can leave the player vulnerable to their acid cloud.