| 21. | ""'Gibbula guishanensis " "'is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
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| 22. | ""'Gibbula guttadauri " "'is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
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| 23. | ""'Gibbula houarti " "'is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
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| 24. | ""'Gibbula leucophaea " "'is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
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| 25. | ""'Gibbula philberti " "'is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
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| 26. | ""'Gibbula racketti " "'is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
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| 27. | ""'Gibbula rarilineata " "'is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
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| 28. | ""'Gibbula sementis " "'is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
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| 29. | ""'Gibbula senegalensis " "'is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
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| 30. | ""'Gibbula spratti " "'is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
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