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> Pleioptygma Conrad, 1863 was know for over a century from extinct fossil
> species, of which there are one Miocene [the type: P. carolinensis Conrad,
> 1840)]
From the mid-1800's to the early 1970's, most of the Pliocene of
eastern North America was misidentified as upper Miocene. The error
persists in some publications. P. carolinensis (Conrad) is a Pliocene
species.
There are a few other genera in similar taxonomic quadries, such as
Lapparia (Paleogene, bounced between Mitridae and Volutidae).
--
Dr. David Campbell
425 Scientific Collections
University of Alabama
"I think of my happy condition, surrounded by acres of clams"
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