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Syndesmis aethopharynx sp. nov. (Turbellaria: Neorhabdocoela: Umagillidae), from the sea urchin Paracentrotus lividus, with notes on a probable third species from this host
Westervelt, C.A.; Kozloff, E. (1990). Syndesmis aethopharynx sp. nov. (Turbellaria: Neorhabdocoela: Umagillidae), from the sea urchin Paracentrotus lividus, with notes on a probable third species from this host. Cah. Biol. Mar. 31(4): 431-437
In: Cahiers de Biologie Marine. Station Biologique de Roscoff: Paris. ISSN 0007-9723, more
Peer reviewed article  

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Keyword
    Marine

Authors  Top 
  • Westervelt, C.A.
  • Kozloff, E.

Abstract
    At Banyuls-sur-Mer, Paracentrotus lividus is host to Syndesmis echinorum Francois, 1886 and also to another umagillid, S. aethopharynx sp. nov. This worm is paler and more slender than S. echinorum. Its pharynx, moreover, is a bipartite structure, with a bulbous anterior portion and cylindrical posterior portion. A small part of the common sperm duct is dilated to form a seminal vesicle, and the ejaculatory duct is nearly straight, rather than coiled. The seminal receptacle is exceptionally long and the vagina is correspondingly short. What appears to be a third species of Syndesmis in P. lividu is discussed briefly.

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