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Notes on the ultrastructure of the setae on the fourth antennulary segment of the Balanus amphitrite cyprid (Crustacea: Cirripedia: Thoracica)
Lagersson, N.C.; Garm, A.; Høeg, J.T. (2003). Notes on the ultrastructure of the setae on the fourth antennulary segment of the Balanus amphitrite cyprid (Crustacea: Cirripedia: Thoracica). J. Mar. Biol. Ass. U.K. 83(2): 361-365
In: Journal of the Marine Biological Association of the United Kingdom. Cambridge University Press/Marine Biological Association of the United Kingdom: Cambridge. ISSN 0025-3154, more
Peer reviewed article  

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Keywords
    Antennae; Marine crustaceans; Neurons; Setae; Ultrastructure; Balanus amphitrite Darwin, 1854 [WoRMS]; Cirripedia [WoRMS]; Crustacea [WoRMS]; Thoracica [WoRMS]; Marine

Authors  Top 
  • Lagersson, N.C.
  • Garm, A.
  • Høeg, J.T.

Abstract
    This study presents electron microscopy (SEM, TEM) observations on the putative settlement receptors of the fourth antennulary segments. The TEM data from all nine setae are from the outer dendritic segment. Eight of them have morphological characteristics, indicating bimodal sensory properties while one seta (sE) is presumed to be a unimodal mechanoreceptor. We suggest that setae A and B are stimulated by the water flow, seta D is olfactory, seta E detects the topography of the substratum by touch, and the subterminal setae are touch chemoreceptors. No function is suggested for seta C.

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