Complex sentence: A 2007 monograph on the neotropical Proteaceae authored by Ghillean Prance and colleagues took the total to 33, Ten of which are threatened, principally by habitat destruction.
Split into simpler sentences: A 2007 monograph on the neotropical Proteaceae authored by Ghillean Prance and colleagues took the total to 33. Ten species are threatened, principally by habitat destruction.