Summary
Species of the amphipod genus Paraceradocus found near the Antarctic Peninsula were observed in aquaria. The animals live under stones in burrows in sediment which they excavate with their gnathopods. During burrowing the animal regularly turns backwards in a somersault-like movement. Paraceradocus feeds on detritus, which is manipulated by the gnathopods and the antennes. The gnathopods are also used for grooming. A dense brush of setae at the medial surface of the carpi of the gnathopods I is used to clean off fine particles from the antennes. These particles are transferred to the maxillipeds and are ingested. The rear appendages are mainly cleaned by the gnathopods II. Young animals sitting between the gnathopods of the adult participate in feeding.
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Coleman, C.O. Burrowing, grooming, and feeding behaviour of Paraceradocus, an antarctic amphipod genus (Crustacea). Polar Biol 10, 43–48 (1989). https://doi.org/10.1007/BF00238289
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DOI: https://doi.org/10.1007/BF00238289