Many people have been talking about what a species is and whats not lately. In
several instances people have said that no genetic information has been
collected on certain taxa's. For many people, you might be wondering what role
does genetics and morphological characters have in delimitation of species and
so on. Well heres a nice reference.
 
Wayne, Robert K, 1992. On the Use of Morphological Genetic Characters to
Investigate Species Status. Conservation Biology, Vol. 6 No. 4, pp.  590-592
 
I hope it helps and you don't find it too boring!! Just kidding.
 
:-)
Later,
Emilio