> Richard Petit wrote:

> As for non-controverserial, I think you will find that at this stage
> of our knowledge of the Mollusca that almost all higher arrangements
> are controversial.  If it bothers you that Cassidae has been "reduced"
> to a subfamily, you have the option of accepting the alternative
> arrangement (see note 139 by Tonnoidea).

* always remember that systematics is an anarchist sport: the
classification you use is supposed to reflect your judgement regarding
the appropriate classification, and nothing in the Codes is supposed to
restrict your taxonomic freedom. Other students of the taxa ("experts")
or organizations or may publish classifications, but they don't have any
'legal' standing that compells their use by anyone.

fred.
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