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. 2015 Sep 3;9:240. doi: 10.3389/fnbeh.2015.00240

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Copyright © 2015 Nagel and Kleineidam.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution and reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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FIB-FESEM- and TEM-images of the S. coelocapitulum. Sagittal view of the cuticular pit of one S. coelocapitulum. The distal part of the pit is enlarged compared to the proximal part. (B) The compact proximal part of the pit reaches 1 μm and the hollow distal part reaches 2.5 μm deep into the antennal lumen. The insertion of the dendritic outer segments of the sensory neurons into the sensory peg is tilted. (C,D) Sagittal TEM-Images of two different S. coelocapitula. (C) The cuticular pit (p), the outer dendritic segment (ods), the dendritic sheath (ds), and three supporting cells (tormogen (to), trichogen (tr), thegocen (th)) are visible. (D) The lamellation of the trichogen cell and the proximal end of the pit define the sensillum lymph cavity (slc). Scale in (A,B): 1 μm, scale in (C): 0.5 μm, scale in (D): 0.1 μm.