The posterior margin of the head weakly concave to flat, but never strongly convex. Used in Antkey to separate Plagiolepis exigua from Plagiolepis alluaudi and Plagiolepis pygmaea.
Scratchpads developed and conceived by (alphabetical):
Ed Baker,
Katherine Bouton
Alice Heaton
Dimitris Koureas,
Laurence Livermore,
Dave Roberts,
Simon Rycroft,
Ben Scott,
Vince Smith
