On 08/11/2009, Harry G. Lee <[log in to unmask]> wrote:
> Right on, Andrew
>
> I put a locally-collected Williamia krebsii
> Mørch, 1877 under the scope yesterday to confirm.
> The same topology is seen in the Melampidae
> (except for Blauneria, which has the opposite
> orientation). Despite the similarity in their
> embryonic chirality, I've always thought of
> Pyramidellidae (Heterobranchia) and the
> Melampid-Siphonaria (Eupulmonata) lineages as very distant phylogenetically.
>
> Harry
>
> At 02:17 PM 11/8/2009, you wrote:
>>The protoconch of Siphonaria is, I think, dextral-hyperstrophic, like
>>those of Pyramidellidae etc. Pseudopulmonates.
>>
>>
>>--
>>Regards
>>Andrew Grebneff
>>Dunedin, New Zealand
>>Fossil preparator
>>Mollusc, Toyota & VW van fanatic
>>
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