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Table 2 Innervation of CSOs by cerebral nerves; categories of CSOs

From: Use of axonal projection patterns for the homologisation of cerebral nerves in Opisthobranchia, (Mollusca, Gastropoda)

Nerve Aplysia punctata Archidoris pseudoargus Pleurobranchea meckeli Acteon tornatilis[10] Haminoea japonica[11] CSO categories
N1 lip lip lip lip lip / anterior cephalic shield no category
N2 inner branch basal part of the labial tentacle inner part of the oral tentacle/oral lobe oral veil anterior groove among the anterior cephalic shield lip organ ASOa
N2 outer branch tip of the labial tentacle outer part of the oral tentacle/oral lobe labial tentacle posterior groove among the anterior cephalic shield anterior Hancocks organ ASOb
N3 rhinophore rhinophore rhinophore possibly reduced in Acteon posterior Hancocks organ PSO
Nclc anterior/lateral body wall anterior/lateral body wall anterior/lateral body wall posterior cephalic shield posterior cephalic shield no category