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Attachment of Dermophthirius carcharhini (Monogenea: Microbothriidae) to the Galapagos Shark Carcharhinus galapagensis

Thomas G. Rand, Michael Wiles and Paul Odense
Transactions of the American Microscopical Society
Vol. 105, No. 2 (Apr., 1986), pp. 158-169
Published by: Wiley on behalf of American Microscopical Society
DOI: 10.2307/3226388
Stable URL: http://www.jstor.org/stable/3226388
Page Count: 12
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Attachment of Dermophthirius carcharhini (Monogenea: Microbothriidae) to the Galapagos Shark Carcharhinus galapagensis
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Abstract

Attachment of Dermophthirius carcharhini is described using light, scanning electron, and transmission electron microscopy. Adult worms place a cup-shaped opisthohaptor over the proximal dorsal surface of a placoid scale and are firmly attached by means of a cement composed of an acellular, tyrosine-rich lipoprotein. Adhesion is further enhanced by a scale-like topography of the cement and by longitudinal furrows on the ventral opisthohaptoral surface that are complementary with the surface structures and pattern of the host's placoid scale. Perhaps a reduced pressure within the opisthohaptoral cup, sealed by a parenchymatous rim, also contributes to attachment. The opisthohaptor depresses and erodes host epidermis and ruptures goblet cells in the area of attachment, presumably making the scale more susceptible to detachment by the worm.

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