Comparative Parasitology 68(2) 2001 - Peru State College
Comparative Parasitology 68(2) 2001 - Peru State College
Comparative Parasitology 68(2) 2001 - Peru State College
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254 COMPARATIVE PARASITOLOGY, <strong>68</strong>(2), JULY <strong>2001</strong><br />
Figures 15-17. Tegument of posterior dorsal region<br />
of Lobatostoma jungwirthi. 15. Excretory pore<br />
on the dorsal cone. 16. Type of monociliate papilla<br />
in the posterior cone region. 17. Multiciliate sensory<br />
receptor in the posterior dorsal region. Scales: 15,<br />
17 = 5 (Jim; 16 = 10 fjim.<br />
the 4 types of receptors described by Rohde and<br />
Watson (1992) in the larva of L. manteri. In addition,<br />
a third kind of receptor was observed that<br />
corresponds to the marginal body complex in the<br />
adult. However, the complex formed by the marginal<br />
bodies was observed as described for the<br />
adult, though the pores of these glands are not<br />
yet developed in the posterior region of the ventral<br />
adhesive disc in the preadult.<br />
The most common receptors in the preadult<br />
Copyright © 2011, The Helminthological Society of Washington<br />
and in the adult were the intermediate length<br />
monociliate and the nonciliate dome-shaped papillae.<br />
The monociliate structures may correspond<br />
to some of the types I to V of monociliate<br />
dome-shaped papillae described for adult L.<br />
manteri (Rohde and Watson, 1989a). The nonciliate<br />
dome-shaped papillae may be homologous<br />
to those of type VI A and B found in the<br />
adult of L. manteri. Both types of receptors were<br />
abundant over the entire body, arranged in circles<br />
on the ventral adhesive disc. Longer monociliate<br />
papillae and multiciliate receptors were<br />
found exclusively in the adult. Probably more<br />
than one type of nonciliate and monociliate papillae<br />
may exist. It would be interesting to study<br />
these papillae further under transmission electron<br />
microscopy.<br />
Literature Cited<br />
Fredericksen, D. 1978. The fine structure and phylogenetic<br />
position of the cotylocidium larva of Cotylogaster<br />
occidentalis Nickerson, 1902 (Trematoda,<br />
Aspidogastrea). Journal of <strong>Parasitology</strong> 64:<br />
961-966.<br />
. 1980. Development of Cotylogaster occidentalis<br />
Nickerson, 1902 (Trematoda, Aspidogastridae)<br />
with observations on the growth of the ventral<br />
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Baer, 1827. Journal of <strong>Parasitology</strong> 66:973-984.<br />
Halton, D. W., and R. A. W. Lyness. 1971. Ultrastructure<br />
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Cotylogaster occidentalis (Trematoda: Aspidogastrea).<br />
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, , and I. Weller. 1982. Cotylogaster<br />
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the American Microscopical Society 101:253-<br />
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Kritscher, V. E. 1974. Lobatostoma jungwirthi nov.<br />
spec. (Aspidocotylea, Aspidogastridae) aus Geophagus<br />
brachiurus Cope 1894 (Pise., Cichlidae).<br />
Annalen des Naturhistorischen Museums in Wien<br />
78:381-384.<br />
Lunaschi, L. 1984. Helmintos parasites de peces de<br />
agua dulce de Argentina. II. Presencia de Lobatostoma<br />
jungwirthi Kritscher, 1974 (Trematoda:<br />
Aspidogastrea) en Cichlasoma facetum (Jenyns).<br />
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Rohde, K. 1972. Sinnesrezeptoren von Lobatostoma<br />
n. sp. (Trematoda, Aspidogastrea). Die Naturwissenschaften<br />
59:1<strong>68</strong>-169.<br />
. 1994. The Aspidogastrea, especially Multicotyle<br />
purvisi Dawes, 1941. Advances in <strong>Parasitology</strong><br />
10:78-151.<br />
, and N. Watson. 1989a. Sense receptors in