Mammal Species of the World, 3rd edition (MSW3) is a database of mammalian taxonomy, based upon the 2005 book Mammal Species of the World. A Taxonomic and Geographic Reference (3rd ed). Don E. Wilson & DeeAnn M. Reeder (editors). Johns Hopkins University Press, 2,142 pp. (Available from Johns Hopkins University Press, 1-800-537-5487 or (410) 516-6900, or at http://www.press.jhu.edu). Although the database will be updated in the future (edited by DeeAnn M. Reeder and Kristofer M. Helgen), it is not, and will not be continuously updated.