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Figure 1


Fig. 1. (A) Location of fan organs and major chemoreceptors (antennules) of crayfish. The fan organs are multisegmental flagellae (exopodites) of the mouthparts (maxillipeds) and are feathered distally (B). (B,C) Scanning electron micrographs taken during the power stroke (B), showing the extended feathered hairs. During the recovery stroke (C) the feathered hairs are folded in. Scale bars, 1 mm. Reprinted from Breithaupt (Breithaupt, 2001) with permission of The Biological Bulletin.