These people never cease to amaze me. It must truly be a God-given gift to be able to decipher all that from a cranium, two jaw fragments and two teeth. (Do I even need to add a sarcasm tag?)
There are googols of scholarly fictions waiting to be harvested from Evolutias magical, self-creating universe. Explaining the steps to spider silk is a really tough tale for Evolutians to weave, but tinkering with the primate stuff is absolutely essential for their Darwinian faith.