Arthropluras are passively tamed, before you approach them, you need to use bug repellent. Here is a list of most effective to least effective taming foods:

1.Broth Of Enlightenment

2. Spoiled Meat

3. Raw Meat

The Arthroplura saddle is unlocked at level 54 and costs 30 engram points.

More Arthropluera Taming & KO Tips