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. 2013 Mar 22;8(3):e60351. doi: 10.1371/journal.pone.0060351

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© 2013 Ma et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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(A) Anterior view of the labium. Inset shows palm-like microtrichia in the asterisk region. (B) Posterior view of the labium. Note the campaniform sensilla (arrowheads) on the lateral side of the prementum. (C) Magnification of the labial palpi. Arrowheads show campaniform sensilla on the two segments. (D) The distal segment of the labial palp, noting the membranous concave and two types of campaniform sensilla (arrowheads). bb, Böhm's bristles; bs, basiconic sensilla; cs, chaetic sensilla; lp1, 2, labial palp I and II; m, mentum; pm, prementum; sm, submentum. Scale bars: (A) and (B) = 200 μm; (C) = 100 μm; (D) = 25 μm.