Besides the turtle ants, there was one other type of ant crawling around in the same area. They were quite aggressive, often taking a threatening stance with their gaster turned down and under their body. The one above seems to be saying, “Back! This scale is mine”. The scale above, by the way, differs from the ones I posted about earlier.
The ants above were fairly active. The one below, however, never moved from the spot I found it. While I assume it’s the same species, it has a slightly different body build. Note, for example, how much wider the head is. Maybe it’s a soldier?
Subjects: Ants, Ants, Bees, Wasps and Relatives, and Insects.
Places: Brazil, Minas Gerais, South America, Uberlandia, and Victorio Siquieroli Park.
Life Stages: Adult.
Sexes: Female.
Taxa: Class Insecta, Family Formicidae, and Order Hymenoptera.
Colors: Black.
Lovely photos, Troy! Clear enough to identify your ants, at least tentatively, as Camponotus senex.
Thanks for the tentative id, Alex.