Key to Myrcidris Species

This key to species of Myrcidris, based on the worker caste, has been provided by Phil Ward.


 * Larger species, with relatively broad head; HW 0.49-0.61, CI 0.75-0.79 (n = 14); Amazonas, Brazil => Myrcidris epicharis
 * Smaller species, with more elongate head; HW 0.39-0.42, CI 0.64-0.66 (n = 3); Guyana => undescribed species

Measurements and indices used:
 * HW - maximum width of head, including the eyes (in mm)
 * HL - length of head, measured from the anterior extremity of the clypeus to the midpoint of a line drawn across the posterior margin of the head (in mm)
 * CI - cephalic index = HW/HL