You people really know your couples! Can a bridge tournament be far behind?
Putting together all the couples mentioned so far, we have this list:

S. T. Brooks & wife
John Q. & Rose Burch
Tom & Beatrice Burch
Glenn and Laura Burghardt
Lyle and Sarah Campbell (plus sons David, Matthew, Andrew)
Crawford & Jean Cate
Emery and Elsie Chace
Gary and Holly Coovert
Jim and Bobbi Cordy
John & Mary D'Aiuto
Al and Bev Deynzer
Glen & Marion Deuel, Huntsville, Alabama
James Hall & wife (he described 'em and she drew 'em), 19th century,
Albany, New York
Barbara and Frank Haviland
Jules and Carole Hertz
Kim and Linda Hutsell
Graham and Sue Jeffrey, Port Hardy, BC
Bob and Betty Lipe, Florida
A. Gordon Melvin and Lorna Melvin
Paula Mikkelsen and her husband in the 1980's
David and Margaret Mulliner
Ida S. & Tom S. Oldroyd
Roy & Forrest Poorman
Lovell Reeve & wife
Mary and Ed Schelling
Schilder & Schilder
John and Gladys Sennott
Paul and Carol Skoglund, Alabama
Herbert H. and Amelia (Daisy) Smith, Alabama
Mel Springer, wife, and daughter
Kevan and Linda Sunderland
the Van Landinghams, Outer Banks
Harold and Emily Vokes, New Orleans, Louisiana
Danny & Hiromi Yoshimoto, California

In addition, there are some couples who are not husband and wife, but
worthy of mention all the same:

Peter Egerton and family
Helmut Nisters and mother
& of course the Sowerby family

It would be nice to hear more about how couples work together on shells.
(Usually we hear about the opposite!) Bobbi Cordy's description was not
only to the point, but moving as well.

P.S. to David Campbell: How does a whole family work together on shells?
You may be able to give us some insight into the lives of the Sowerbys.

Andrew K. Rindsberg
Geological Survey of Alabama