Question Ants course week 2

Thank you for the second lecture. it was very informative and I particularly appreciated the microscopic examination of the ants! I have annotated my photo of the bull ant following that discussion. One question came to mind after the lecture. Is the metanotum in ants always reduced to a ridge or to being indiscernible, or is it sometimes quite visible? In my bull ant, it seems to be reduced to a ridge.