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Caecidae is a taxonomic family of very small and minute sea snails or micromolluscs, marine gastropod molluscs in the order Littorinimorpha.

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Caecum is a genus of minute sea snails, marine gastropod micromolluscs or micromollusks in the family Caecidae or blind shells.

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Caecum atlantidis is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Caecidae.

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Caecum auriculatum is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Caecidae.

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Caecum brennani is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Caecidae.

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Caecum campanulatum is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Caecidae.

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Caecum circumvolutum is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Caecidae.

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Caecum clarum is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Caecidae.

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Caecum condylum is a species of minute sea snail, a marine gastropod mollusc or micromollusk in the family Caecidae.

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Caecum cooperi, common name the Cooper's Atlantic caecum, is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Caecidae.

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Caecum glabrum is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Caecidae.

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Caecum johnsoni, common name the Johnson's caecum, is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Caecidae.

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Caecum maori is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Caecidae.

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Caecum pulchellum, common name the beautiful caecum, is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Caecidae.

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Caecum rehderi is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Caecidae.

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Caecum subannulatum is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Caecidae.

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Caecum textile is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Caecidae.

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Caecum trachea is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Caecidae.

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Caecum varanoi is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Caecidae.

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Caecum vitreum is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Caecidae.

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Caecum wami is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Caecidae.

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Mauroceras is a genus of minute sea snails, marine gastropod mollusks or micromollusks in the family Caecidae.

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Meioceras is a genus of minute sea snails, marine gastropod mollusks or micromollusks in the family Caecidae.

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Meioceras nitidum is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Caecidae.

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Parastrophia is a genus of minute sea snails, marine gastropod molluscs or micromollusks in the family Caecidae.