Shalom to all,
I would appreciate some help with distinguishing among the following forms of Buccinum undatum L. 1758:
coeruleum G. O. Sars
littoralis G. O. Sars
pelagicum G. O. Sars
carinatum Turton
planum Verk.
striatum Penn.
and perhaps Buccinum groenlandicum Chemnitz 1788.
Thanks, Moshe Erlendur