In 16.29 13/03/2000 +0000, hai scritto:

>Siphocypraea problematica Heilprin, 1887 is known from Florida and the

>Carolinas, in the late to latest Pliocene Waccamaw and Caloosahatchie

>Formations.  The genus originated by the Early Miocene, occurring in the

>Chipola Formation (Siphocypraea s.s.), with Muracypraea ranging from

>Miocene to Recent.  Olsson and Petit (1968, Bull. Am. Paleo. 54(242),

>available as part of Paleontological Research Institute Special Publication

>19, Papers on Neogene Mollusks by Axel A. Olsson) discuss the genus.

>Current information on distribution is in L. Campbell, 1993, Pliocene

>molluscs from the Yorktown and Chowan River Formations in Virginia,

>Virginia Division of Mineral Resources Publication 127.  This lineage is

>highly variable in the Pliocene of Florida; Petuch illustrates several of

>the variations as new genera and species.

>

>

>

>Dr. David Campbell

>

>"Old Seashells"

>

>Department of Geological Sciences

>CB 3315 Mitchell Hall

>University of North Carolina at Chapel Hill

>Chapel Hill NC 27599-3315

>USA

>

>bivalve@email.unc.edu

>919-962-0685

>FAX 919-966-4519

>

>"He had discovered an unknown bivalve, forming a new genus"-E. A. Poe, The

>Gold Bug

Thanks David,

For your precious information about this strange old cowrie...now I know more about

it with you help