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Ophryotrocha mammillata Ravara, Marçal, Wiklund & Hilário 2015

visual system

Suschenko and Purschke 2008
ocelli
URI: http://purl.obolibrary.org/obo/BTO_0001758

Definition: small simple eyes, found in many invertebrates, usually consisting of a few sensory cells and a single lens

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