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Morphologie fonctionnelle des podia pénicillés chez l'échinide fouisseur Echinocardium cordatum (Echinodermata)
Flammang, P.; De Ridder, C.; Jangoux, M. (1990). Morphologie fonctionnelle des podia pénicillés chez l'échinide fouisseur Echinocardium cordatum (Echinodermata), in: De Ridder, C. et al. (Ed.) Echinoderm Research. Proceedings of the Second European Conference on Echinoderms, Brussels, Belgium, 18-21 September 1989. pp. 233-238
In: De Ridder, C. et al. (1990). Echinoderm Research: Proceedings of the Second European Conference on Echinoderms, Brussels, Belgium, 18-21 September 1989. A.A. Balkema: Rotterdam, Brookfield. ISBN 90-6191-141-9. 343 pp.
Available in  Authors 
Document type: Conference paper
Keywords
    Biology > Organism morphology > Animal morphology
    Echinocardium cordatum (Pennant, 1777) [WoRMS]
    Marine/Coastal
Authors  Top 
  • Flammang, P., more
  • De Ridder, C.
  • Jangoux, M., more
Abstract
    Functional morphology of the penicillate podia of the burrowing echinoid Echinocardium cordatum (Echinodermata). Phyllopodes and preapical podia are the two main types of penicillate podia of Echinocardium cordatum. They basically consist of an extensible shaft topped by a disc with slender digitate extensions. Phyllopodes are food-collecting podia; their disc surfaces are covered by densely packed club-shaped digitations. Preapical podia build up the burrow's funnel and undertake the maintenance of its wall; their disc surfaces are flat with blunt-tiped digitations located at the disc margin. A thick and well innervated glandular epiderm occurs either at the tip of the digitations (phyllopodes) or on the whole disc surface and the inner side of digitations (preapical podia). It is suggested that these particular epidermal areas could produce adhesive/de-adhesive secretions that would facilitate sediment handling by penicillate podia.
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