Abstract
Abstract Marine isopods of the genus Bathynomus are important scavengers. We studied the microscopic structure of setae on the antennule and antenna of Bathynomus pelor using scanning electron microscopy. The animals were caught in baited traps off the Northwest Shelf of Australia and brought to the surface by a remotely operated vehicle (ROV). The peduncles of the antennule and antenna displayed pits with simple setae and some penicillate setae located outside these pits. The ventral side of the antennule flagella houses a furrow, bordered by knob shaped projections and filled with aesthetascs. Bifurcated and penicillate setae are also present on this flagellum. Clustered and branched setae were found on the flagellum of the antenna. These structures indicate that B. pelor possesses a set of complex setae on its antennule and antenna that it may use for sensory perception.
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