Copepods are small but extremely abundantcrustaceans which occur in every type of aquatic habitat. The rapid expansionof taxonomic knowledge concerning copepods has made it difficult for studentsand non-specialists to access the voluminous, but scattered primary literature.This volume is designed to provide an overview of the entire group - frommarine plankton to subterranean forms, and from parasites to minute inhabitantsof the interstitial spaces between sediment particles.

This work provides a user-friendly, species level taxonomic key based on morphology, current nomenclature, and modern taxonomy using molecular tools which fulfill the most pressing needs of both researchers and environmental managers. This key arms the reader with the tools necessary to improve their species identification abilities. This book resolves another issue as well: the mix of female and male characters used in keys to the calanoid copepods. Often, during the identification process, both calanoid copepod sexes are not available, and the user of such a key is stuck with an uncertain identification. Here, separate male and female keys to the calanoid copepods are provided for both the genera and species levels.

The Fourth Edition of The Light and Smith Manual continues a sixty-five-year tradition of providing to both students and professionals an indispensable, comprehensive, and authoritative guide to Pacific coast marine invertebrates of coastal waters, rocky shores, sandy beaches, tidal mud flats, salt marshes, and floats and docks. This classic and unparalleled reference has been newly expanded to include all common and many rare species from Point Conception, California, to the Columbia River, one of the most studied areas in the world for marine invertebrates. In addition, although focused on the central and northern California and Oregon coasts, this encyclopedic source is useful for anyone working in North American coastal ecosystems, from Alaska to Mexico. More than one hundred scholars have provided new keys, illustrations, and annotated species lists for over 3,500 species of intertidal and many shallow water marine organisms ranging from protozoans to sea squirts. This expanded volume covers sponges, sea anemones, hydroids, jellyfish, flatworms, polychaetes, amphipods, crabs, insects, snails, clams, chitons, and scores of other important groups. The Fourth Edition also features introductory chapters on marine habitats and biogeography, interstitial marine life, and intertidal parasites, as well as expanded treatments of common planktonic organisms likely to be encountered in near-to-shore shallow waters.

The first monograph to compile observations about the post-embryonic development of the morphologically and ecologically diverse subclass Copepoda. Analyses provide insights into the correspondence of developmental stages among species, architecture of the naupliar body, and patterning of copepodid body and limbs.

Winner of the 2022 Marsh Book of the Year Award A long-awaited volume in the New Naturalist series examining the trees of Britain.