Sminthidae
Sminthidae is a family of mouse-like jumping rodents. They are represented by only one extant genus, Sicista, represented by 19 species found throughout most of Eurasia, from central Europe east to Siberia, and south to southern China. However, they were much more diverse and had a much wider range in prehistoric times, having multiple genera and being found not only in Eurasia but also throughout North America, where they existed up to the early Pleistocene. They have a well-attested fossil record which dates as far back as the early Oligocene. They were formerly classified as the subfamily Sicistinae in the family Dipodidae alongside the jerboas and jumping mice, but phylogenetic evidence supports all three of these belonging to distinct families, thus leaving only the jerboas in Dipodidae. Extant species Genus Sicista Armenian birch mouse Sicista armenica Northern birch mouse, Sicista betulina Caucasian birch mouse, Sicista caucasica Long-tailed birch mouse, Sicista caudata Tsimlyansk birch mouse, Sicista cimlanica Chinese birch mouse, Sicista concolor Kazbeg birch mouse, Sicista kazbegica Kluchor birch mouse, Sicista kluchorica Nordmann's birch mouse, Sicista loriger Altai birch mouse, Sicista napaea Gray birch mouse, Sicista pseudonapaea Severtzov's birch mouse, Sicista severtzovi Strand's birch mouse, Sicista strandi Southern birch mouse, Sicista