The Treatise on Invertebrate Paleontology has descriptions of modern
and fossil familes and genera, though it is a bit dated.  Volumes
exist for several groups.

The Southern Synthesis occasionally fails to describe families not
found in the Australian region, but sometimes covers even those.

--
Dr. David Campbell
425 Scientific Collections
University of Alabama
"I think of my happy condition, surrounded by acres of clams"

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