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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PAOLA AND DAMBORENEA—TEGUMENT OF LOBATOSTOMA JUNGWIRTHI 253<br />
Figures 11-14. Ventral adhesive disc of adult Lobatostoma jungwirthi. 11. General view of the marginal<br />
alveoli on the marginal region at midbody level of the ventral adhesive disc. 12. Walls of the marginal<br />
alveoli showing 2 circles of dome-shaped papillae (arrow) and marginal gland pore. 13. Detail of the<br />
internal wall with almost 1 complete circle of monociliate papillae (arrows). 14. Ventral view: transverse<br />
septum with monociliate (black arrow) and nonciliate papillae (white arrow). Scales: 11 = 50 u,m; 12 =<br />
25 u,m; 13, 14 = 10 jrni.<br />
observed in the posterior third of the dorsal region<br />
of the adult of L. jungwirthi. Paired multiciliate<br />
receptor complexes with 10 short cilia<br />
were described by Rohde and Watson (1990d)<br />
to be located dorsally to the mouth cavity of<br />
larval M. purvisi, but our record is the first of a<br />
surface multiciliate receptor in aspidogastreans.<br />
However, multiciliate receptors are found in other<br />
groups of parasitic Platyhelminthes, i.e., in the<br />
taste organ of the buccal complex of Pricea tnultae<br />
Chauhan, 1945 (Monogenea, Gastrocotylidae).<br />
Rohde and Watson (1996) found these receptors<br />
concentrated in small pits. Additionally,<br />
multiciliate pit-receptors were observed in the<br />
buccal complex of Polylabroides australis (Rohde<br />
and Watson, 1995b) and in specimens of an<br />
undescribed species of Proseriata (Monocelididae:<br />
Minonidae) (Rohde and Watson, 1995a).<br />
Pores of the marginal bodies were observed<br />
on the external border between the marginal alveoli<br />
of juveniles and adults of L. jungwirthi.<br />
Kritscher (1974) found similar structures in the<br />
adult of the species. These pores were described<br />
as part of a glandular system in the adhesive disc<br />
of aspidogastrids (Rohde, 1994).<br />
Unlike the preadult, the youngest juvenile<br />
does not have oral lobules. A few less-developed<br />
alveoli were observed on the ventral adhesive<br />
disc. Two sensory receptors were found in the<br />
preadult of L. jungwirthi'. a ciliate receptor with<br />
a cilium of intermediate length, and a nonciliate<br />
dome-shaped receptor. These correspond to 2 of<br />
Copyright © 2011, The Helminthological Society of Washington