As a further illustration of the complications, Cucullaea has a
distinctive shell and dentition pattern, matching a long lineage of
fossils, yet the reported DNA data has it mixed right in with rather
more ordinary looking arcids.

On Thu, Nov 8, 2012 at 3:35 PM, Trish Hartmann <[log in to unmask]> wrote:
> This is a clarification and correction (thanks to a heads-up from Harry Lee)
> of my previous response to Marlo's request for more info on Cucullaearca:
>
> Cucullaearca, previously considered a subgenus of Barbatia and now elevated
> to genus, is a member of the family Arcidae, and has never been considered a
> member of the family Cucullaeidae.
>
> Cucullaeidae is a family in the superfamily Arcoidea and thus related to
> Arcidae. This family is a relict group apparently with only one extant
> genus: Cucullaea.
>
> An in-depth look at Cucullaeidae can be found in this 495 page dissertation
> by Devin Buick, titled: The Rise and Fall of Cucullaeidae: Exploring
> Transitions in Species Richness. This is available at this site:
>
>  http://etd.ohiolink.edu/send-pdf.cgi/Buick%20Devin%20P.pdf?ucin1275654678
>
> Trish



--
Dr. David Campbell
Visiting Professor
Department of Natural Sciences
Gardner-Webb University
Boiling Springs NC 28017

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