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Fine structure of the dorsal papillae in the holothurioid Holothuria forskali (Echinodermata)
VandenSpiegel, D.; Flammang, P.; Fourmeau, D.; Jangoux, M. (1995). Fine structure of the dorsal papillae in the holothurioid Holothuria forskali (Echinodermata). Tissue Cell 27(4): 457-465. dx.doi.org/10.1016/S0040-8166(95)80066-2
In: Tissue and cell. Oliver and Boyd: Edinburgh. ISSN 0040-8166; e-ISSN 1532-3072
Peer reviewed article  
Available in  Authors 
Keywords
    Echinodermata [WoRMS]; Holothuria Linnaeus, 1767 [WoRMS]
    Marine/Coastal
Author keywords
    Ultrastructure; sensory organ; ambulacral system; holothurioid; echinodermata
Authors  Top 
  • VandenSpiegel, D.
  • Flammang, P.
  • Fourmeau, D.
  • Jangoux, M., more
Abstract
    The dorsal surface of the holothurioid Holothuria forskali bears several longitudinal rows of modified podia called papillae. Each papilla consists of a conical stem topped by an hemispherical bud. Their gross tissue stratification is the same all along the papilla being made up of four tissue layers, viz. an inner mesothelium, a connective tissue layer, a nerve plexus and an outer epidermis. The latter is differently organized according to whether it belongs to the stem or to the bud. The epidermis of the bud is built up by ciliated cells that intimately contact the nerve plexus and have the classical structure of echinoderm sensory cells. The papillae are thus sensory organs involved in mechanoreception and possibly chemoreception.
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