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. 2013 Apr 18;10:20. doi: 10.1186/1742-9994-10-20

Figure 1.

Figure 1

Cephalic sensory organs (CSOs) within the Opisthobranchia. A: Aplysia punctata, picture showing the rhinophores and the labial tentacles. B: Pleurobranchaea meckeli, picture showing the rhinophores, the labial tentacles and the oral veil. C: Archidoris pseudoargus, picture showing the rhinophores, the labial tentacles and the oral veil, usually the labial tentacles and the oral veil are completely covered by the massive mantle. In the picture shown, part of the mantle is upturned and the labial tentacles and the oral veil are highlighted. Abbreviations (referring to all subfigures, colors indicate the nervous innervation of the CSOs). N2 (N2a= inner branch, N2b= outer branch) in blue and the N3 in red, LT – labial tentacle, OV – oral veil, RH – rhinophore.