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Sender:
Conchologists of America List <[log in to unmask]>
Subject:
Re: sibling shells
From:
Andrew Grebneff <[log in to unmask]>
Date:
Sun, 4 Aug 2002 18:32:20 +1200
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Conchologists of America List <[log in to unmask]>
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>There are two types of Bursa granularis with each having a different
>operculum growth pattern.

Operculum I find unreliable.

Volutomitra banksi may have a minute operculum or, more often, none at all.

Sassia kampyla operculum is variable and may have terminal or central
nucleus. No way are these cryptic spp.
--
Andrew Grebneff
165 Evans St, Dunedin 9001, New Zealand
<[log in to unmask]>
Seashell, Macintosh, VW/Toyota van nut

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