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Date: | Fri, 5 Oct 2007 23:16:15 -0400 |
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Thanks, Allen. My first impression was that this is some sort of vermetid although I confess I'm still fooled by non-molluscan "worm-shells".
Could the sand grain attachment be a behavior limited to an early phase of development? Could the behavior be limited to only a limited taxon within vermetidae?
Agglutinated attachment seem to be a general behavior of Xenophoridae and Scaliolidae. Of course, the animal may "intend" to camouflage itself, but I think these external extras bring attention from hominid collectors and observers.
Is there a vermetid expert around?
David Kirsh
-----Original Message-----
>From: Allen Aigen <[log in to unmask]>
>
>The fact that the inside of the shell is shiny is pretty good evidence
>that it is not a polychaete but probably a gastropod. It also looks
>like it has at least two distinct layers at the broken end, typical of
>gastropods. The attached sand grains are odd, but not all that
>important. Perhaps it is a vermetid protoconch (plus 1/2 whorl), which
>attaches itself to a substrate (generally larger than sand grains
>though...)
>
"I learned long ago, never to wrestle with a pig. You get dirty, and besides, the pig likes it." -- G.B. Shaw
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