title: Evolving between land and water: key questions on the emergence and history of the Hippopotamidae (Hippopotamoidea, Cetancodonta, Cetartiodactyla).
authors.affiliation: CNRS, USR 3137 CFEE, P.O. BOX 5554, Addis Ababa, Ethiopia. eweston29@googlemail.com
authors.forename: Jean-Renaud
authors.initials: JR
authors.lastname: Boisserie
authors.forename: Rebecca E
authors.initials: RE
authors.lastname: Fisher
authors.forename: Fabrice
authors.initials: F
authors.lastname: Lihoreau
authors.forename: Eleanor M
authors.initials: EM
authors.lastname: Weston