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Marine Biology | 1985

Functional morphology of the podia and ambulacral grooves of the comatulid crinoid Antedon bifida (Echinodermata)

M.C. Lahaye; Michel Jangoux

Feeding units — viz. triplets of unequally-sized podia associated with protective lappets — occur all along the pinnules of adult Antedon bifida (Pennant). Small food particles are trapped by direct mucus impingement to the wall of primary and secondary podia (there are no mucus net or mucus thread helping in this process). Large particles are caught by primary and secondary podia which partly curl over them. Small particles accumulate on the collecting podia before being transferred to the groove, while large particles are transferred one by one. Transfer of particles to the groove occurs by wiping the collecting podia on the ciliary tracts against the ciliary current. When active, tertiary podia always paddle against the ciliary current. They serve in bolus formation (mucus embedding of food particles), but do not participate in bolus compaction or propulsion. Elimination of unwanted particles occur through the action of secondary podia whose movements may disrupt the lappets palisade, thus creating a sideward current that moves particles from the groove to the outside. Typical podial triplets do not occur along brachial and calycinal grooves. Both brachial and calycinal podia function mostly in guiding and regulating particle flow. The feeding structures of early pentacrinoid larvae of Antedon bifida recall to mind those of pinnules of adult individuals. They consist of twenty-five podia arranged in five radial triplets alternating with five interradial pairs. They are similar to the pinnular feeding structures of adults in that they have both collecting (radial) and paddling (interradial) podia.


Proceedings of the 5th international echinoderm Conference | 1985

Post-spawning behavior and early development of the comatulid crinoid, Antedon bifida

M.C. Lahaye; Michel Jangoux; B.F. Keegan; B.D. O'Connor


Archive | 1990

Postmetamorphic development of Myzostomum cirriferum (Annelida) and effects of the symbiote on its crinoid host Antedon bifida (Echinodermata)

Igor Eeckhaut; M.C. Lahaye; Michel Jangoux; Chantal De Ridder; Philippe Dubois


Archive | 1990

Fréquence et causes présumées de la régénération brachiale chez Amphipholis squamata (Echinodermata: Ophiuroidea)

V. Alva; Michel Jangoux; Chantal De Ridder; Philippe Dubois; M.C. Lahaye


Archive | 1990

Unusual sensory structures on the spines and tentacle scales of the brittlestar Ophiocomina nigra (Echinodermata)

Brendan Ball; Michel Jangoux; Chantal De Ridder; Philippe Dubois; M.C. Lahaye


Annales de la Société royale zoologique de Belgique | 1988

Morphologie et comportement des larves doliolaria d' Antedon bifida (Echinodermata, Crinoidea)

M.C. Lahaye; Michel Jangoux


Archive | 1990

Morphologie fonctionnelle des clavules chez le spatangide Echinocardium cordatum (Echinoidea, Echinodermata)

P. Hanot; Chantal De Ridder; Michel Jangoux; Philippe Dubois; M.C. Lahaye


Archive | 1990

Morphologie fonctionnelle des podia penicillés chez l'échinide fouisseur Echinocardium cordatum (Echinodermata)

Patrick Flammang; Chantal De Ridder; Michel Jangoux; Philippe Dubois; M.C. Lahaye


Vie marine. Hors série | 1989

Les structures gonoporales chez la comatule Antedon bifida (Echinodermata, Crinoidea)

M.C. Lahaye; Michel Jangoux


Archive | 1991

The attachment disk of comatulid cystideans (Crinoidea)

M.C. Lahaye; Michel Jangoux; T. Yanagisawa; I. Yasumasu; C. Oguro; N. Suzuki; T. Motokawa

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Michel Jangoux

Université libre de Bruxelles

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Chantal De Ridder

Université libre de Bruxelles

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Marianne Ghyoot

Université libre de Bruxelles

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P. Bulteel

Université libre de Bruxelles

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Didier Jans

Université libre de Bruxelles

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Pierre Coulon

Université libre de Bruxelles

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V. Alva

Université libre de Bruxelles

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