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Note sur l’association entre le mollusque parasite Thyca crystallina (Gould) (Gasteropoda, Prosobranchia) et l’astérie Linckia laevigata (L.) (Echinodermata) sur le récif de l'île de Laing (Papouasie Nouvelle-Guinée)
Bouillon, J.; Jangoux, M. (1984). Note sur l’association entre le mollusque parasite Thyca crystallina (Gould) (Gasteropoda, Prosobranchia) et l’astérie Linckia laevigata (L.) (Echinodermata) sur le récif de l'île de Laing (Papouasie Nouvelle-Guinée). Ann. Soc. R. Zool. Bel. 114(2): 249-256
In: Annales de la Société Royale Zoologique de Belgique = Annalen van de Koninklijke Belgische Vereniging voor Dierkunde. Société Royale Zoologique de Belgique: Bruxelles. ISSN 0771-5528, more
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Keywords
    Linckia laevigata (Linnaeus, 1758) [WoRMS]; Thyca crystallina (Gould, 1846) [WoRMS]; Papua New Guinea [Marine Regions]; Marine

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Abstract
    An infestation rate of 22.3 % characterizes the parasitic association between the blue starfish Linckia laevigata and the prosobranch mollusc Thyca crystallina around Laing Island. Infestation rate varies significantly with the degree of water movement. The smallest molluscs occur on the upper and lateral faces of the starfish arms; their orientation with regard to the starfish mouth is seemingly not at random. The largest molluscs are found on the oral arm surface on the right hand side of the ambulacral groove and facing the starfish mouth. The Thyca/Linckia association of Laing Island is compared with that occurring around the Banda Islands.

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