 the similarly sized yellow-backed duiker "Cephalophus silvicultor"), foraging in dense growth where their low builds would have been advantageous.The family Anoplotheriidae was assigned to Tesserachenae by Gray in 1821, to Belluae by Bonaparte (who named it Anoplotheriina) in 1850; to Artiodactyla by Cope in 1889, to Ruminantia by Gregory in 1910, and finally to its own superfamily Anoplotherioidea by Romer in 1966.Here, the Anoplotherioidea are also considered to include the Cainotheriidae and Dacrytheriidae.