Perhaps, but many salamanders (I believe plants as well)have different numbers of chromosome yet fall under the DPS. I still don't think we have a firm grasp on what a species really is.
A distinction of interest only to the legally debauched.
I concur wholeheartedly, especially in the plant kingdom. I've got vicia on my property that is a hybrid of European and domestic varieties. I've got dandelions that are viable hybrids of annual and perennial "species" (annual/perennial itself being somewhat arguable as some can behave either way depending upon climate).