Ommatophore (Eyestalk) Magic: Lobatus costatus

The conch (Lobatus costatus) (Fig A; Image by Martin S. Gilman, MEd), a slow-moving, herbivorous bottom-dweller has a relatively large (up to 1.5 mm in diameter) and sophisticated eye compared with other gastropods. The stalks are modified tentacles and support olfactory and visual organs (Fig B). These stalks protrude from beneath the shell and move independently. The stalks will regenerate…

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