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Oʻahu tree snails, genus Achatinella, form a large genus of colorful, tropical, tree-living, air-breathing, land snails, arboreal pulmonate gastropod mollusks in the family Achatinellidae.

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Oʻahu tree snails, genus Achatinella, form a large genus of colorful, tropical, tree-living, air-breathing, land snails, arboreal pulmonate gastropod mollusks in the family Achatinellidae.

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Achatinella abbreviata, an Oʻahu tree snail, is an extinct species of colorful tropical tree-living air-breathing land snail, an arboreal pulmonate gastropod mollusk in the genus Achatinella.

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Achatinella buddii is an extinct species of land snail, a gastropod in the family Achatinellidae. It was endemic to Oʻahu.

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Achatinella caesia is an extinct species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Achatinellidae. This species was endemic to Oʻahu.

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Achatinella casta is an extinct species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Achatinellidae. This species was endemic to Oʻahu.

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Achatinella decora is an extinct species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Achatinellidae. This species was endemic to Oʻahu, Hawaiʻi.

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Achatinella elegans is an extinct species of a land snail, gastropod in the family Achatinellidae. It was endemic to Oʻahu.

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Achatinella juddii is an extinct species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Achatinellidae. This species was endemic to Oʻahu, Hawaiʻi.

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Achatinella juncea is an extinct species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Achatinellidae. This species was endemic to Oʻahu, Hawaiʻi.

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Achatinella lehuiensis is an extinct species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Achatinellidae. This species was endemic to Oʻahu, Hawaiʻi.

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Achatinella livida is an extinct species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Achatinellidae. This species was endemic to Oʻahu, Hawaiʻi.

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Achatinella papyracea is an extinct species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Achatinellidae. This species was endemic to Oʻahu, Hawaiʻi.

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Achatinella spaldingi is an extinct species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Achatinellidae, now extinct. This species was endemic to Oʻahu, Hawaiʻi.

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Achatinella thaanumi is an extinct species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Achatinellidae. This species was endemic to Oʻahu, Hawaiʻi.

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Achatinella apexfulva is a reportedly extinct species of colorful, tropical, arboreal pulmonate land snail in the family Achatinellidae, once present on Oahu, Hawaii. A. apexfulva is the type species of the genus Achatinella. The specific name, apexfulva, meaning "yellow-tipped", refers to the yellow tip of the snail's shell.

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Achatinella bellula is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Achatinellidae. This species is endemic to the Hawaiian island of Oahu in the United States. No more than five specimens have been observed since 1979.

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Achatinella bulimoides is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Achatinellidae. This species is endemic to Hawaii.

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Achatinella byronii is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Achatinellidae. This species is endemic to Oahu, in the Hawaiian Islands.

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Achatinella curta is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Achatinellidae. This species is endemic to the Hawaiian Islands.

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Achatinella fulgens is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Achatinellidae. This species is endemic to Hawaii.

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Achatinella fuscobasis is a species of air-breathing land snail, a terrestrial pulmonate gastropod in the family Achatinellidae. This species is endemic to Hawaii.

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Achatinella lila is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Achatinellidae. This species is endemic to the northern Ko‘olau Mountains, Oahu.

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Achatinella mustelina is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Achatinellidae. This species is endemic to the Waianae Range of the island of Oahu, Hawaii.

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Achatinella pulcherrima is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Achatinellidae. This species is endemic to the island of Oahu in Hawaii.

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Achatinella stewartii is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Achatinellidae. This species is endemic to Hawaii.

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Achatinella swiftii is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Achatinellidae. This species is endemic to Hawaii.

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Achatinella vulpina is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Achatinellidae. This species is endemic to Hawaii.