> What if one specific mutation of orb spider is really nice but he was killed and its "member" is in a single female orb spider limiting the greatness of a goo

> What if one specific mutation of orb spider is really nice but he was killed and its "member" is in a single female orb spider limiting the greatness of a good mutation That's a very soft limit; a spider lays dozens (hundreds?) of eggs after mating once. Mortality is extremely high, so there's tons of room for "really nice" mutations to spread quickly.