I’ve been easy on you guys recently. In honor of Labor Day, then, I’m going to make you Labor for tonight’s challenge.

Here are two similarly spiny ants:

Ant A

Ant B

Myrmecos Points will be awarded as follows:

4 points for guessing the genus of Ant A
4 points for guessing the genus of Ant B
2 points for the telling me whether the spines are evolutionarily convergent or synapomorphic (=shared from a common spiny ancestor).

Correct guesses must be supported by character information (for the IDs) or references (for the evolution question).

As usual, the cumulative points winner for the month of September will win their choice of 1) any 8×10-sized print from my photo galleries, or 2) a guest post here at Myrmecos on a safe-for-work topic of their choosing.