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Sensilla Distribution in Tabanus atratus Labrum

This image shows the distribution of sensilla in the labrum of Tabanus atratus. Chemoreceptors are represented by ovals, while other sensilla are mechanoreceptors. The dashed lines indicate the junction of the vestibule with the food canal.

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Sensilla Distribution in Tabanus atratus Labrum

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  1. A Tabanus atratus #1 (col. N. Dyer, Aug. 2015). A, labrum (entire); B, tip; C, trichites (mechanoreceptors) right wall food canal; D, same in left wall. B 250 um D C

  2. L R Tabanus atratus #1: chemoreceptors (ovals) in walls of food canal. R, right wall; L, left wall. All other trichites are mechanoreceptors. Distance: dash line, 0.82 mm; solid line, 1.03 mm.

  3. Tabanus atratus labrum. A, entire; B, food canal; C, vestibule. Legend: c, chemoreceptor; m, mechanoreceptor. Dashed line indicates junction of vestibule (v) with food canal (fc). A B c C fc m m c v

  4. #6 Tabanus atratus, labrum with sensilla in food canal. Sensilla numbered from distal to proximal. Dashed lines indicate junction of vestibule (v) with food canal (fc). R = right wall of food canal; L = left wall of canal. Of the 30 to 35 sensilla in each wall only one is a chemoreceptor (indicated by #11), all others are mechanoreceptors. R #5 L #1 Note: T. atratus spmn no. 9 fc v #11 #11 63 um

  5. Tip of Tabanus atratus labrum. 154 um

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