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Fine structure of the anterior adhesive apparatus (head organs) of Bravohollisia gussevi Lim, 1995 (Monogenea: Ancyrocephalidae)

Published online by Cambridge University Press:  28 November 2005

W. L. WONG ,
G. P. BRENNAN ,
D. W. HALTON  and
L. H. S. LIM
W. L. WONG
Affiliation:
Institute of Biological Sciences, University of Malaya, 50603 Kuala Lumpur, Malaysia
G. P. BRENNAN
Affiliation:
School of Biology and Biochemistry, Queen's University Belfast, Belfast BT9 7BL, UK
D. W. HALTON
Affiliation:
School of Biology and Biochemistry, Queen's University Belfast, Belfast BT9 7BL, UK
L. H. S. LIM
Affiliation:
Institute of Biological Sciences, University of Malaya, 50603 Kuala Lumpur, Malaysia
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Abstract

A study of the anterior adhesive apparatus (head organs) of Bravohollisia gussevi Lim, 1995 was carried out using light and electron microscopy. The anterior adhesive apparatus or head organs in B. gussevi comprise 6 circular openings or apertures in the antero-lateral region, associated pits lined with specialized microvillous tegument that differ from the general body tegument, a bundle of ducts, and uninucleate gland cells located lateral to the pharynx. The uninucleate glands of the anterior adhesive apparatus (head organs) comprise 2 types of cells, one kind of cell producing rod-like bodies (S1) and the other oval bodies (S2). The S1 bodies are filled with numerous, less electron-dense vesicles in an electron-dense matrix, while S2 bodies have no vesicles but contain a more homogeneous electron-dense matrix. Interlinking band-like structures were observed between S1 bodies. Similar band-like structures were found between S2 bodies. The formation of S1 bodies was followed by transmission electron microscopy. However, the formation of S2 bodies was unclear and could not be resolved. Uniciliated structures were also observed around the openings of the anterior adhesive apparatus. Each uniciliated structure is usually associated with an opening of a gland cell producing granular, electron-dense, secretory bodies, which differ from the secretions produced by the lateral gland cells of the anterior adhesive apparatus.

Keywords

MonogeneaBravohollisia gussevianterior adhesive apparatushead organsadhesionultrastructure
Type
Research Article
Information
Parasitology , Volume 132 , Issue 3 , March 2006 , pp. 427 - 438
Copyright
© 2005 Cambridge University Press

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