Pennak's Freshwater Invertebrates of the United States: Porifera to Crustacea
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Completely revised and updated, this definitive reference source features a wealth of new knowledge on invertebrate animal phyla covered in the previous edition as well as fully modified sections on the preparation of materials. New features include: Current taxonomical arrangements of all freshwater invertebrate animals, excluding insects; Improved graphical treatments and keys to identification, several provided by specialists; Photographs and color plates to aid identification; More than 300 line drawings, many new to this edition; and Taxonomic keys carried uniformly to genus level in all but two phyla, with frequent references to species.
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