The genera of Leptostraca are distributed differently. Nebalia is cosmopolitan. Nebaliella is confined to cold waters, being found in Antarctica, southern Australia, and the high latitudes of the Northern Hemisphere. Nebaliopsis is a pelagic genus with a worldwide distribution. Paranebalia is found in central America, Bermuda, New Caledonia, and Australia. Levinebalia has been recorded only in Australia and New Zealand. Dahlella was collected from hydrothermal vents near the Galápagos, and Speonebalia has been recorded from only marine caves in the Turks and Caicos Islands.
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