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Zoomed profile of head of A, Dorymyrmex brunneus (CASENT0192698, www.antweb.org, image by Erin Prado); and B, Linepithema oblongum (CASENT0106974, www.antweb.org, image by Alexander Wild). Maxillary palpomere 3 is indicated (mxp3) and hypertrophied in Dorymyrmex (maxillary palpomeres 1 and 2 are not seen in image A). Arrowhead indicates one of the setae that forms the psamophore.
