Class [Mammalia] Linnaeus, 1758 - mammals Order Rodentia Bowdich, 1821 - rodents Family Heteromyidae Gray, 1868 - pocket mice, kangaroo rats, and kangaroo mice Genus Liomys Merriam, 1902 - spiny pocket mice Liomys salvini Thomas, 1893 - Salvin's spiny pocket mouse