メソニクス目
(1995), Journal of Vertebrate Paleontology 15 (2): 387–400, http://www-personal.umich.edu/~gingeric/PDFfiles/PDG290_Sinonyx.pdf
↑ 出典:Geisler, J.H. and Uhen, M.D. (2003). "Morphological support for a close relationship between hippos and whales". Journal of Vertebrate Paleontology 23: 991–996. doi:10.1671/32.
↑ 出典:Geisler, J.H. and Uhen, M.D. (2005). "Phylogenetic relationships of extinct cetartiodactyls: results of simultaneous analyses of molecular, morphological, and stratigraphic data". Journal of Mammalian Evolution 12 (1 and 2): 145–160. doi:10.