Dear Aydin,

It will be interesting to see what kind of refinement has been
achieved in answering this question now that we've plunged into the
electronic era.

Over a decade ago, this forum dealt with essentially the same
question, e.g.,
<http://www.listserv.uga.edu/cgi-bin/wa?A2=ind0207D&L=conch-l&P=R2303>.

Certainly (1) the number of extant valid nominal species will be more
refined than of extant species, and (2) Estimates of extant
shell-less mollusks will be easier to gather and refine than of
testaceous ones.

Harry


At 10:51 AM 3/20/2013, you wrote:
>Could the good folks on CONCH-L direct me to some literature that gives the
>approximate number of the extant shelled gastropod species (excluding slugs)?
>
>Many thanks.
>
>Aydin Orstan
>
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