Class Mammalia Linnaeus, 1758 - mammals Order Marsupialia Jameson, 1818 - marsupials see Cohort Marsupialia Jameson, 1818 Family Caenolestidae Trouessart, 1898 - "shrew" opossums 1 Genus Caenolestes Thomas, 1895 - common "shrew" opossums 2 Genus Rhyncholestes Osgood, 1924 - Chilean "shrew" opossums