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Postmetamorphic development of Myzostomum cirriferum (Annelida) and effects of the symbiote on its crinoid host, Antedon bifida (Echinodermata)
Eeckhaut, I.; Lahaye, M.-Ch.; Jangoux, M. (1990). Postmetamorphic development of Myzostomum cirriferum (Annelida) and effects of the symbiote on its crinoid host, Antedon bifida (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. 317-321
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
    Development (biological)
    Symbionts
    Antedon bifida (Pennant, 1777) [WoRMS]; Myzostomum cirriferum Leuckart, 1836 [WoRMS]
    Marine/Coastal
Authors  Top 
  • Eeckhaut, I.
  • Lahaye, M.-Ch.
  • Jangoux, M., more
Abstract
    Three postmetamorphic developmental stages (viz. the juvenile, male and hermaphroditic stages) occur in Myzostomum cirriferum, a symbiote of the comatulid Antedon bifida. Juveniles are 100 to 500 µm long without functional gonads, males measure from 500 to 700 um and have functional testes while hermaphroditics (i.e. adult worms) are 700 to 2 000 µm long and possess both functional testes and an ovary. Juvenile and some male worms live attached to the ambulacral grooves of the pinnules of their comatulid host where they produce marked deformation of the lappets and podia, and behave as ectoparasites. Hermaphroditics and other males move freely on the host body wall; they do not produce any deformation of the host's body and behave as ectocommensals.
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