Class Mammalia Linnaeus, 1758 - mammals
Subclass Theria Parker & Haswell, 1897
Order Carnivora Bowdich, 1821 - carnivores
Suborder Caniformia Kretzoi, 1943
Family Mustelidae Batsch, 1788 - weasels, badgers, skunks, and otters
Subfamily Lutrinae Bonaparte, 1838 - otters
Genus Aonyx Lesson, 1827 - clawless otters
Aonyx cinerea (Illiger, 1815) - Oriental small-clawed otter
Aonyx cinerea concolor Rafinesque, 1832