Dear Ron,
I think Rudiger Bieler, Field Museum, Chicago is a Vermetid specialist.
Hoep he can help you!
Best regards,
Adrienne Jochum
Adrienne Jochum, PhD
Research Scientist, Malacology
Naturhistorisches Museum der Burgergemeinde Bern
Bernastr. 15
CH-3005 Bern, Switzerland
Institute of Ecology and Evolution
University of Bern
Baltzerstr. 6
CH-3012 Bern, Switzerland
Senckenberg Forschungsinstitut und
Naturmuseum Frankfurt
Dept. Malacology
Senckenberganlage 25
60325 Frankfurt am Main, Germany
https://www.senckenberg.de/adrienne-jochum