Please forgive my ignorance if this is common knowlege, but is this a picture of the fangs, normally hidden behind the chelicerae? I know I have seen illustrations of this before, and the scientific names of the parts, but I wasn't 100% sure what I was looking at. I have many tarantulas and a few different wolf spiders currently, and am always looking to learn more about them

an external view of the female reproductive organs normally called an epigynum. The last two photos show the same anatomy dissected. Many spiders are identified by the male or female reproductive organs.

Incredible close up! I just double checked, and the illustration I had in the back of my mind was a close up of the male palp (entelegyne), ventral view. I'm sure that seems like a silly mistake to those far more experienced at looking at them close up, but I NEVER get close enough to my tarantulas or true spiders to get that close of a view. I get to examine their molts, but it just isn't quite the same. This was wonderful to get see- thank you for posting it!