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Apical organ of a Platynereis dumerilii (Polychaeta, Nereididae) trochophore larva. Annotated Image

  

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Image

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Authors: L.P. Nezlin, E.E. Voronezhskaya

Color Channels:

Green — serotonin
Blue — FMRFamide
Red — acetylated alpha-tubulin

Notation:

AO - apical organ;
prototroch - prototroch.

Image
description

Apical organ neurons are located in the center of the episphere. Prototroch cilia are visible along the body edge.
© Laboratory of Evolutionary Morphology (Zoological Institute RAS), IDB RAS, SPBU