Well now I’m confused because I had no idea that cellar spiders even existed, thinking all of the things in my house were harvestmen. To answer your question, yes. That could be considered convergent evolution, as harvestmen are as closely related to a woodlouse as it is a spider, so they are quite different in genetics yet similar in appearance. They do have noticeable differences, as harvestmen have a single body segment, while cellar spiders (like all spiders) have two. Also, cellar spiders (unlike harvestmen) have venom glands and silk glands, so thats cool. Also, maybe this thread could be used to talk about convergent evolution, rather than focused on one topic - there’s a dedicated thread for quick questions: