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Date: | Sun, 14 Nov 1999 18:19:25 -0700 |
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Thanks Paul! You have been a real help to me. I'm going to label these shells as
you suggest (still deciding between C. maculosum and C. stercomuscarum tho'). I
think the Astraea is not the gibberosa, as mine are taller, more like the tecta,
some I'm going to put a tentative A. spirata on them. Thanks again! You have
come through where my meager library fails!
Nora
[log in to unmask] wrote:
> Greetings Nora,
> The Donax sounds like Donax punctatostriatus Hanley. It's the largest West
> Central American species of Donax, and also one of the commonest. It's
> purple inside, and your comparison to the shape of D. carinatus sounds just
> about perfect.
> The Cerithium could be either C. stercusmuscarum Valenciennes or C. maculosum
> Kiener. My guess would be C. maculosum, first because I think it looks more
> like C. litteratum than C. stercusmuscarum does, and secondly because it is
> the larger of the two. C. stercusmuscarum, like C. litteratum, is usually
> about 1 inch, but C. maculosum can reach almost twice that size. They are
> both common.
> As for the Astraea - There is a little West Central American top shell called
> Astraea spirata (Dall) that is very similar to A. tecta americana. I don't
> think it is too common though. If not that, then probably A. gibberosa
> Dillwyn, but that species is usually not as tall-spired as A. tecta americana.
> Regards,
> Paul M.
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