According to Wikipedia, recent research has shown that these wild Bactrian Camels are not feral domesticated Bactrian Camels but share a more distant ancestor. Hence the name C. ferus has been elevated to be considered a third species (critically endangered), corresponding to small populations of wild two-humped camels.
Our backbone currently has the genus Camelus as:
"C. bactrianus ferus" is in fact now considered a full species C. ferus (with an IUCN red list assessment: http://www.iucnredlist.org/details/63543/0).
According to Wikipedia, recent research has shown that these wild Bactrian Camels are not feral domesticated Bactrian Camels but share a more distant ancestor. Hence the name C. ferus has been elevated to be considered a third species (critically endangered), corresponding to small populations of wild two-humped camels.