"From 40 to 55 million years ago" . . . . . . . "Chorlakkia hassani, a new middle Eocene Dichobunid (Mammalia, artiodactyla) from the Kuldana Formation of Kohat (Pakistan)" . . . . . . . . . . "Chorlakkia hassani, a new middle Eocene dichobunid (Mammalia, Artiodactyla) from the Kuldana formation of Kohat (Pakistan)" . . . "Chorlakkia hassani, a new middle Eocene dichobunid (Mammalia, artiodactyla) from the Kuldana formation of Kohat (Pakistan)" . . . . .