Table 3 in How many mammal species are there now? Updates and trends in taxonomic, nomenclatural, and geographic knowledge

Table 3. Summary of total species, available name type localities (including preoccupied, replacement, and suppressed names), and new species descriptions and split species since MSW3 found in each of the 8 terrestrial biogeographic realms (not including marine species, other than for available name type localities) and 7 continents (including marine species for all metrics), as well as the land area (in million km 2) and species density (in species per million km 2). Region nameTotal speciesaAvailable namesNew species descriptionsSplit speciesLand area (million km²)Species density (per million km²) bBiogeographic realmNeotropic1,8395,49630226119.0096.79Afrotropic1,5055,57918311122.1068.10Palearctic1,1435,8129217354.1021.13Indomalaya1,0904,3591441247.50145.33Australasia8602,10669627.60113.16Nearctic7163,092169822.9031.27Oceania2147211.0021.00(Biorealm)Antarctic0180014.200.00ContinentAsia2,1047,67624625544.6047.17Africa1,6226,33818411930.4053.36South America1,5864,06826120117.8089.10North America1,1235,2246017424.2046.40Oceania7751,78654558.5091.18(Continent)E urope3212,73863910.0032.10Antarctica45180014.203.17 Land areas for biogeographic realms come from Olson et al. (2001; other than the A ntarctic, which was recalculated to include all of continental Antarctica) and continents come from estimates listed on the Wikipedia pages of each continent. See Fig. 2 for the graphical representation of these data. aTotal species includes recently extinct species but not domesticated or introduced species. bSpecies density calculated as Total Species/Land A rea.