Queen identification

[calopa7]

Hey AC fam! First time here. I'm new to ant keeping, and just caught my first queen yesterday, a huge Atta (leafcutter). Today, I think I caught another one, but definitely, not an Atta, actually, I don't even know if it is an ant. It measures 5mm length, it's black, and have a large abdomen. I'm posting pictures, the best I could take. I live in southeast Brazil if it helps. Thanks for the help.
https://ibb.co/eofkop
https://ibb.co/dnUgB9
(Sorry for the links, I don't know how to post images here)

[EmperorAttaVII]

That is an ant but I cant tell if it is a queen or not because I am bad at identifying ants.

[calopa7]

Update: it laid eggs. I still don't know the species.