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| Tropical | Nontropical | |
| # of Species | 4743 | 5311 |
| Average # of Species per Country | 65.57 | 66.8 |
| Global Land Area (km2) | 77971681.7 | 42630129.9 |
| Species per km2 | 6.0830×10−5 | 1.2458×10−4 |
Countries were defined as tropical if half the total land area of the country is within the tropical latitudes.
