This book is intended to help biologists, commercial shellers, amateur naturalists, teachers, and students identify freshwater mussels found in the streams and lakes of the Midwest. It includes 78 species, over half of which are rare, threatened, endangered, or extinct. The species are arranged in groups that approximate their systematic relationships; therefore, similar-looking species will often, but not always, be grouped together. An index to both the scientific and common names is given in the back of the book.
This is a fine field guide. It would be nice to have a little more information on known individual species life histories, and glochidial hosts. Great for beginners to get their feet wet.