M. longifrons Sundevall's jird (Meriones crassus) is a species of rodent in the family of Muridae.

It is found in Afghanistan, Algeria, Egypt, Iran, Iraq, Israel, Jordan, Kuwait, Libya, Pakistan, Morocco, Niger, Palestine, Oman, Saudi Arabia, Sudan, Syria, Tunisia, Turkey, Western Sahara, United Arab Emirates, Bahrain and possibly Mali.

Sundevall's jird has a soft, fine, light brown fur, with a lighter underbelly.

Being a relatively small mammal, the Sundevall's jird must intake an increased amount of calories in order to produce enough milk.

[3] The breeding season for Sundevall's jird is from January to September, with peak times from February to May.