Key to Pheidole distorta group

This worker key is based on:

This group marked by the bizarre head and mesosoma of the major caste as well as the heavy rugoreticular sculpturing of both its head and mesosoma, most closely resembles the tristis group. Nowhere common, species of the distorta group range variously from Panama to Argentina

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 * Pheidole
 * "New World Pheidole" Wilson 2003

1

 * Major and minor: lacking propodeal spines; instead, the basal and descending faces of the propodeum seen from the side meet to form a right or obtuse angle; the promesonotum in side view rises to form an extremely elevated hump that descends posteriorly through a face as long as the adjacent basal face of the propodeum (Colombia) .. . . . . . Pheidole distorta


 * Minor: has well-developed propodeal spine. Major (in those species where it is known) also has a well-developed propodeal spine, and the posterior face of the promesonotum is shorter than the basal face of the propodeum in side view . . . . . . 2