Dear Ms. Chansigaud,

There is the following reference:

Bouchet, P. 1997. Inventorying the Molluscan Diversity
of the World: What Is Our Rate of Progress? The
Veliger 40(1):1-11

Dr. Bouchet makes a survey of Molluscan species
described between 1967 and 1993, so you can have a
general idea of how many species are described. But he
does not make any distintion between the species
described by professionals and amateurs.

Sincerely,

Paulino



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Paulino J. S. de Souza Jr., M.Sc.
Museu de Zoologia / USP
Caixa Postal, 42694 - CEP 04299-970
Sao Paulo, SP - Brasil

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