I once got one tapped by one of these when i unmounted my carno by accident. My armor is 900+ so i think they might have some armor piercing effect. They dont deal much damage to your tames but instead they reflect your tames' damage (your tames only get damaged when they melee damage arthros). These are on mobile btw i dont know how the pc version is but anyways becareful if you choose to go caving on foot and goodluck to you my guy :D