Dear Dick,
the reason to quote 1981 was correctly interpreted by Bill Fenzan,
and I apologize to not have mentioned it.
I thank you and Bill for your kind replies.
I see that I'd use C. ventricosus. Thank you again
Enzo
Enzo Campani
C.so G. Mazzini 299
57126 Livorno
Italy
Cel 3475362343
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