Hi Fernando,
I am still skeptical that it represents a Jackal. One of its characteristics is its pointed ears...surely a representation would have this feature
I have searched the many forms of Dogon masks but cannot find one that is described as a Jackel...or has rounded ears / large eye ridges/ 'cobra hood'.
There is an African wild dog that has the rounded ears but the Dogon area is not within it's 'range'. There is , of course, the possibility that the sword, although acquired from the Dogon was manufactured elsewhere.
If it is a Jackal ..couldn't the sword be descibed as a 'dog on sword'
If I discover any relevent information I will post it for you.
Kind Regards David