Tetramorium spec. from south Africa

[Antsteak]

Hello Antlovers

I found this nice ant Queen at a german antshop. They said the Queen is from south Africa and a Tetramorium spec.

Can you guys help me to identify them more specific?

The only picture I have (at the moment)



Can I keep them like Tetramorium caespitum or impurum?

Thanks for every comment

[Antsteak]

Can someone help me?

Queen is like 6-7mm and workers ~3mm.