DO NOT ENGAGE OR YOU WILL DIE! I was hunting araneos when this thing came out of nowhere and three shot me! All my dimorphs were literally devoured when I came back. It is like centipedes in real life but instead of killing you slowly with poison it kills you with bites quickly. Do not equip anything lower than Chitin or you will get one shot.
These guys can destroy your armor and weapons, so it's best to let your tames kill them. They can and will destroy your gas masks and hazmat suits regardless if it is vanilla gear or leathal's reusables mod gear. They become a lot more troublesome for player exploration in Aberration as they are frequently found in the blue and red zones. Taller dinos are more likely to keep you from being hit.