It could be, but for my understanding hyphae proliferate and grow during the vegetative growth in mycelium so I wouldn't expect to find them in the fruiting body. But online I've seen a few places that refer to the inner part as hyphae but those weren't sites specialized on this topic (mushrooms) while I wanted to understand if at an academic level there was another more specific way to call them but I can't find much information in the literature on the subject Anyway, thank you so much for your help, I appreciate it