In biogeography, a pantropical (`across the tropics`) distribution is one which covers tropical regions of all of the major continents, i.e. in Africa, in Asia and in the Americas. Examples include the plant genera Acacia and Bacopa. Neotropical is a zoogeographic term that covers a large part of the Americas, roughly from Mexico and the Caribbe..... Found on http://en.wikipedia.org/wiki/Pantropical