Class [Mammalia] Linnaeus, 1758 - mammals Order Rodentia Bowdich, 1821 - rodents Family Heteromyidae Gray, 1868 - pocket mice, kangaroo rats, and kangaroo mice Genus Heteromys Desmarest, 1817 - forest spiny pocket mice Heteromys nelsoni Merriam, 1902 - Nelson's spiny pocket mouse