Order Rodentia is the largest order of mammals both worldwide and in the Indomalayan Region (Corbet and Hill, 1992). They are all comparatively smaller animals with great diversity in habits and modes of life. Rodents naturally display great diversity of form and structure.

  In this book Table - 1 clearly indicates significant changes in number of valid genera, species and subspecies in all the countries of this subcontinent. Under these circumstances it was strongly felt necessary to give systematic/classified list of rodent taxa considered to be currently valid up to the subspecies level of the then British India region which includes India, Pakistan, Nepal, Bhutan, Bangladesh, Sri Lanka and Myanmar in a tabular form (Table 3). The present articles is outcome of the same. Current taxonomic status and a validity of each and every taxon from family to subspecies described in past and recent years from each country has been highlighted in Table - 2 under the column "Present Valid Name" with a support of the bibliographic reference.