Paraeopod Morphology and Locomotion in the Amphipod Genera Cerapus and Siphonoecetes
Annual Meeting of the American Society of Zoologists, American Microscopical Society, Animal Behavior Society, Biological Society of Washington, Crustacean Society, and the International Association of Astacology / Philadelphia, Pennsylvania
Amphipods in the genera Cerapus and Siphonecetes were examined to determine morphological adaptations to similar habitats (tubes). Specimens were observed and these appendages used in locomotion were submitted to SEM analysis. Cerapus builds parchment tubes on silty substrates while Siphonoecetes constructs sand tubes inside a secondary domicile. Amphipods in both genera use modified peraeopod(s) and uropods to grasp the inside of the tube during locomotion. Siphonoecetes uses paeraeopods 5 and 6 to grasp its relatively heavy domicile, while Cerapus uses only peraeopod 5 to hold its lightweight parchment tube. Cerapus uses uropod 1 to sever its tube and swim using its setose second antennae. Siphonoecetes moves by pulling itself forward with stout second antennae. SEM analysis shows structural similarities with other small shell-inhabiting specimens.
Conference Proceeding Title
American Zoologist - Vol 23, No. 4: The Place of Thomas Hunt Morgan in American Biology
Oxford University Press
Thomas, James Darwin, "Paraeopod Morphology and Locomotion in the Amphipod Genera Cerapus and Siphonoecetes" (1983). Oceanography Faculty Proceedings, Presentations, Speeches, Lectures. 472.