My take on it, which I intend to make into a model at some point, is that "Black-skinned" means that all Salamanders have a mutation of the skin, triggered by the Melanochrome, that makes them appear to have been burned black all over. Not just black skin of a "normal" shape, but burnt to the bone, with no nose, shriveled ears, lips burnt away, scarred all over.
His nose and lip seem odd... but other than that, rocking!