>  I often noticed that some genus names such as Gazameda etc. were considered
>  here as true genus, there as subgenus, and in other places as invalid items.
>  For example, Turritella cingulata, Turritella (Gazameda) cingulata, Gazameda
>  cingulata... so the old question: where's gone the truth, where is it
>  hidden?
>  What generic names can be considered as valid, or useful, finally?

The type of Turritella is T. terebra, if I remember correctly.  This species is fairly distinct from most of the species that have been indiscriminately assigned to Turritella (fossil and modern).

There's always the problem that there's no absolute standard as to what constitutes a genus.  However, since Turritella has probably been overused, Gazameda and other names probably merit recognition as genera.

    Dr. David Campbell
    Old Seashells
    University of Alabama
    Biodiversity & Systematics
    Dept. Biological Sciences
    Box 870345
    Tuscaloosa, AL  35487-0345 USA
    [log in to unmask]

That is Uncle Joe, taken in the masonic regalia of a Grand Exalted Periwinkle of the Mystic Order of Whelks-P.G. Wodehouse, Romance at Droitgate Spa

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