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THE FUNCTIONAL MORPHOLOGY OF GNATHOPODS: IMPORTANCE IN GROOMING, AND VARIATION WITH REGARD TO HABITAT, IN TALITROIDEAN AMPHIPODS

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image of Journal of Crustacean Biology

ABSTRACT Six talitroidean amphipod species from terrestrial, semiterrestrial, fresh-water, and marine habitats were examined with scanning electron microscopy. A number of specialized and ornate grooming organs are described in which cuticular scales and setae have been modified into bristles, fans, combs, and brushes. Terrestrial, semiterrestrial, and aquatic groups possess grooming modifications quite distinct from each other, while individual species, within a single habitat group, differ much less. The structure and function of several nongrooming specializations is also discussed. Although sexual dimorphism of arthropod grooming structures is rare, such dimorphism is present in the Amphipoda. This dimorphism stems from the use of the major grooming appendages as precopulatory organs in the male. The cuticular structures described in this study are used to scrape and brush the body during grooming movements, presumably enabling these crustaceans to exploit better their environment.

Affiliations: 1: Department of Zoology, The Ohio State University, Columbus, Ohio 43210; present address, Newfound Harbor Marine Institute, Route 3, Box 170, Big Pine Key, Florida 33043.

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/content/journals/10.1163/1937240x82x00310
1982-01-01
2016-12-04

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