[Kingdom] Animalia Linnaeus, 1758 - animals Grade Enterozoa Grade Cœlomata Phylum Vertebrata (Lamarck, 1801) Branch Craniata Linnaeus, 1758 Grade Gnathostoma Subgrade Pentadactyla lipobranchia Branch Amphicondyla [monotypic] Class Mammalia Linnaeus, 1758 - mammals Grade Placentalia Owen, 1837 see Cohort Placentalia Owen, 1837 Subclass Ungulata (Linnaeus, 1766) Order Sirenia Gill, 1872 - sea cows 1 Genus Halicore Illiger, 1811