Biogeographic realm
broadest biogeographic division of the Earth's land surface
Palearctic realm
Australasian realm
Western Indo-Pacific
Central Indo-Pacific
Indo-Pacific
Neotropical realm
Oceanian realm
Afrotropical realm
Antarctic realm
Nearctic realm
Temperate Northern Pacific
Tropical Atlantic
Tropical Eastern Pacific
Holarctic
Eastern Indo-Pacific
Temperate Australasia
Temperate Northern Atlantic
Temperate South America
Temperate Southern Africa