From Heraldry of the World
| Heraldry of the World|
The main resource for civic heraldry since 1996 with 108,285 images
الجمهورية الإسلامية الموريتانية - République Islamique de Mauritanie - Republik bu Lislaamu bu Gànnaar
|The National symbol of Mauritania||The National Flag||Location|
Mauritania is divided into 12 regions called wilaya and one capital district in Nouakchott, which in turn are subdivided into 44 departments (moughataa).
As far as I know none of these uses heraldic arms.