Normal?

So I'm asking anyone more experienced than myself. This is my male (not mature) aphonopelma seemanni, he's stopped eating which is unusual and doesn't look like premoult. I got a good look at him just now while he was up at the side to check his mouth area. I notice this little ball / lump looking thing which I cannot see on his previous moult which I kept so I'm just curious as to if this is normal or not? I've only been keeping less than a year and don't always get to see the underside of my T's so asking for anyone that knows what this is. Thanks in advance, sorry I cant get a clearer picture my phone refuses to focus anymore than this

Looks fine, I wouldn't worry about it.

@Nightstalker47 Ah good good, every time I see something I'm not used to I just get curious as to what it is

It's called the Labium and it can sometimes be more pronounced depending on the species, especially the lighter coloured ones.

@VanessaS Thank you so much! I've never heard of it but glad I know now for the future x