Landlocked country one, making them the biggest contiguous group in the world. Also, the Central Asian and Caucasian clusters can be considered contiguous, joined by the landlocked Caspian Sea. Mongolia is almost part of this cluster too, being separated from Kazakhstan by only , across Russian or Chinese territory. There are the following "single" landlocked countries (each of them borders no other landlocked country): If the Caucasian countries and Kazakhstan are counted as part of Europe, then Europe has the most landlocked countries, at 20. If these transcontinental countries are included in Asia, then Africa has the most, at 16. Depending on
Somalia gerbil cushioned gerbil ("G. pulvinatus"), Harwood's gerbil ("Dipodillus harwoodi"), least gerbil "G. pusillus", Somalian gerbil "Dipodillus somalicus" and Waters's gerbil ("G. watersi"). The Somalia gerbil can be distinguished from the others by the hairy soles to its hind feet. The head-and-body length is about and the tail . The mass is about . The Somalia gerbil is native to the Horn of Africa. Its range includes Eritrea, Djibouti, eastern Ethiopia and northern Somalia. Its typical habitat is bare or scantily-vegetated, rocky plains, dry grassland and dry savannah. The Somalia gerbil is present in a large area of suitable habitat. No particular