Question: what are the major zoogeographical regions of the world?
Answer: Philip Sclater (1858) and Alfred Wallace (1876) identified the main zoogeographic regions of the world used today: Palaearctic, Aethiopian (today Afrotropic), India (today Indomalayan), Australasian, Nearctic and Neotropical. Marine regionalization began with Ortmann (1896).