challenge: Which of the following characteristics is not used to distinguish Pylaemenes konkakinhensis?
  
  A. Pointed subgenital plate of the abdomen
  B. Two tubercles on the outer edge of the first antenna segment
  C. Presence of granular tubercles in the rear, lateral area of the fourth tergite of the abdomen
  D. Two pairs of tubercles on the top of the head between the eyes
  Answer: 