| 1. | The vast majority of these nations are found within the Holarctic.
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| 2. | They are distributed throughout the Holarctic, particularly in the Palearctic.
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| 3. | Their distribution also makes up most of the Holarctic realm.
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| 4. | The Phycinae have spread to the Afrotropical and the Holarctic.
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| 5. | Oligolophinae are holarctic, with most species found in Europe.
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| 6. | There are approximately 100 mostly holarctic species and subspecies in this genus.
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| 7. | Taxonomic revision of the Holarctic diving beetle genus " Acilius"
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| 8. | They resemble, but are not closely related to, the Holarctic treecreepers.
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| 9. | They are distributed across the Holarctic and Neotropic ecozones.
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| 10. | They are most abundant and diverse in the Holarctic and African biogeographic regions.
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