Sand Rat (Psammomys obesus) also known as the Fat Sand Rat is a terrestrial mammal from the gerbil subfamily that is mostly found in North Africa and Middle East ranging from ...
http://en.wikipedia.org/wiki/Sand_Rat

rat, name applied to various stout-bodied rodents rodent, member of the mammalian order Rodentia, characterized by front teeth adapted for gnawing and cheek teeth adapted for ...
http://encyclopedia2.thefreedictionary.com/sand+rat

rat. Any of numerous long-tailed rodents (especially of the families Muridae and Cricetidae) larger than mice and usually with scaly, naked tails.
http://encyclopedia.farlex.com/sand+rat

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Britannica online encyclopedia article on sand rat:Fat sand rat (Psammomys obesus).Tino Strausseither of two species of gerbils in the genus Psammomys.
http://www.britannica.com/EBchecked/topic/852496/sand-rat