Dear All, Could anybody please inform me the numerical strength (number of species) of Mollusca for each of the following zoogeographical realms as well as the world: Nearctic, Neotropical, Palearctic, Ethiopian (Or African), Oriental and Australasian. Similarly, I would be happy if anyone please inform me the number of species that heve been recorded from each of different marine zonations/divisions of the world. Full reference(s) of the sources would be appreciated. Thanks to everybody.