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Myzostoma fuscomaculatum (Myzostomida), a new myzostome species from False Bay, South Africa
Lanterbecq, D.; Hempson, T.; Griffiths, C.; Eeckhaut, I. (2009). Myzostoma fuscomaculatum (Myzostomida), a new myzostome species from False Bay, South Africa. Hydrobiologia 619(1): 145-154. dx.doi.org/10.1007/s10750-008-9606-7
In: Hydrobiologia. Springer: The Hague. ISSN 0018-8158; e-ISSN 1573-5117, meer
Peer reviewed article  

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Author keywords
    Myzostomida; Annelida; Taxonomy; South Africa; Atlantic Ocean;

Auteurs  Top 
  • Lanterbecq, D.
  • Hempson, T.
  • Griffiths, C.
  • Eeckhaut, I.

Abstract
    A new myzostome species, described here as Myzostoma fuscomaculatum n. sp. was collected on Tropiometra carinata in False Bay (South Africa), during a survey of symbionts associated with comatulid crinoid species. M. fuscomaculatum n. sp. occurred only on T. carinata and not on the more common crinoid, Comanthus wahlbergi. It infested 61.7% of the 120 host specimens collected, of which 64.9% (48 specimens) hosted more than one individual (maximum of 32). M. fuscomaculatum n. sp. was always located on the host's arms and pinnules and was cryptically coloured, closely matching the colour pattern of the host. This is the first record of myzostomes from the cool temperate waters of South Africa's Atlantic coast. The new species is morphologically close to M. gopalai Subramaniam, 1938, collected on T. encrinus in Madras Harbour. M. fuscomaculatum n. sp. differs from M. gopalai in lacking marginal cirri at the adult stage, the presence of three pairs of digestive diverticula, by the position of its lateral organs and by the shape of the manubrium. Molecular phylogenetic analyses based on 18S and 16S rDNA placed M. fuscomaculatum n. sp. into a clade including Hypomyzostoma, Myzostoma and Mesomyzostoma species.

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