>    Like you, I have heard, periodicly, about how many creatures
>become extinct every year---due to loss of habitat, polution, mad
>cow dung, and a few etc's.
>    My question is: Dating from the 1800's, have any mollusks become
>extinct? And does anyone have the last of them?

I am sure that hundreds have been wiped uot in tropical
deforestation... without ever becoming known to science.

  I don't know really, but would imagine that some fluvial snails may
have become extinct... quite a few are endangered.

  Marine species are much less likely to be endangered.

>     Other question: Species from the pliestocene are close but
>different. Did the Pleistocene species become extinct---or merely
>change as time went on?
>   Your devoted Question Man

Many Pleistocene species are still living unchanged... in fact the
majority of Pleistocene species are (the Pleistocene began 1.8my
ago). Many Recent species evolved in the Pliocene (5-1.8my), some in
the Miocene (24-5my)... and a few even in the middle Eocene (42-46my
)!.
--
Andrew Grebneff
Dunedin, New Zealand
64 (3) 473-8863
<[log in to unmask]>
Fossil preparator
Seashell, Macintosh & VW/Toyota van nut
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I want your sinistral gastropods!
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Opinions in this e-mail are my own, not those of my institution
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A: Because it reverses the logical flow of conversation.
Q: Why is top posting frowned upon?