The following statistics are based on version 8.5 of the BioSystematic Database of World Diptera. This version contains a total of 187,077 species name records of which 145,165 (78%) represent valid species. 96% of the species are endemic to one of the biotic regions. For a statistical breakout by families click here.

For statistics on single biogeographic regions click on the following links:
Afrotropical Region
Australasian/Oceanian Region
Nearctic Region
Neotropical Region
Oriental Region
Palaearctic Region

Source tables: valid species per family, valid species per year, name records per family, name records per year.

Biotic Region	Valid Species#	Endemic Species#	% Endemic
Palaearctic Region	40,291	37,123	92
Neotropical Region	29,783	28,504	96
Oriental Region	21,559	20,052	93
Nearctic Region	21,356	18,359	86
Afrotropical Region	19,824	18,891	95
Australasian/Oceanian Region	17,946	17,095	95
All Regions	145,165	140,054	96