Seems like it would thicker legs with hairs if G anthracina -- even if a large sling. How many eyes does it have? Did you catch it locally?
Will follow this - he's interesting looking, esp the legs slimming down to points.
Ah -- six eyes sounds like a recluse -- hence my asking. But I hate people who claim everything is a recluse, so decided to play it safe and ask about eye count instead. And I'm not even sure they exist where you live -- though I googled Uruguay & recluse.
Google it yourself and see if you see the pix I see.... Be careful with it, just in case.
Disclaimer: I am lousy at IDs.
@Braulio Paz I have no idea -- I just noticed when I went looking for spiders in Uruguay with skinny pointed legs and coloured brown (with darker rump) like yours, I kept coming up with recluses. In the US, there is a violin shape that helps ID them -- but I know there are many varieties of recluses. I do know recluses (at least in the US) have 6 eyes. Tarantulas have 8 eyes. Yours could obviously be something completely different -- I stink at IDs -- but I believe yours is a true spider and not a tarantula. Sorry I am not more help.