Ants of the genus Mycocepurus are distinctly
recognizable for the crown-like cluster of horns on their promesonotum,
the fused mesonotum and pronotum on the front of their alitrunk or
midsection. M. smithii has sharp, protruding propodeal (posterior of the
alitrunk) spines unlike M. obsoletus whose propodeal spines are blunt.
Workers also do not have developed promesonotal spines in the center of
their crown.
