John A. Fornshell Department of Invertebrate Zoology, U. S. National Museum of Natural History, Smithsonian Institution, Washington DC, USA Arthropods ISSN 2224-4255 http://www.iaees.org/publications/journals/arthropods/online-version.asp 2024 13 1 7 14 International Academy of Ecology and Environmental Sciences Hong Kong 12 September 2023 20 October 2023 1 March 2024 bioacoustics Birgus latro Coenobita clypeatus Glaucothoe land hermit crabs zoea The mechanoreceptors of land-dwelling juveniles of the family Coenobitidae were studied using scanning electron microscopy to determine how their morphology varied from the mechanoreceptors of the marine dwelling zoea stage. Archived specimens of Birgus latro Leach , 1816 and Coenobita clypeatus Latreille, 1829 from the collections maintained in the National Museum of Natural History, Smithsonian Institution were examined. The mechanoreceptors on the antennules of the planktonic marine larval stage, zoea, are potentially capable of detecting near field sound energy at frequencies two orders of magnitude lower than those of the antennules of the land-dwelling juveniles in both genera. This sensitivity to lower frequencies potentially enables the larval stages to detect sound energy sources at much greater distances. http://www.iaees.org/publications/journals/arthropods/articles/2024-13(1)/morphology-and-function-of-mechanoreceptors.pdf