Slit and top shells

Phylum Mollusca Class Gastropoda Superorder Vetigastropoda Number of families Approximately 12

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A large and diverse group of marine gastropods found from the intertidal zone to the deep sea. Most maintain some bilateral asymmetry in their organ systems; many have shells with slits or other secondary openings.

Photo: An individual of the species Haliotis tu-berculata lamellosa, showing its epipodial tentacles, a characteristic only of the vetigastropods. (Photo by S. Piraino [University of Leece]. Reproduced by permission.)

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