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A scanning electron microscope study on the tegument of Proalarioides kobayashii Park, 1940 (Trematoda)
J P Chu,I S Im and I D Hwang
Department of Preventive Medicine and Public Health, Medical School, Chonbuk National University, Chonju 560-180, Korea.
Abstract
A SEM study was performed on the surface of adult P. kobayashii Park, 1940, recovered from the snake, Elaphe rufodorsata.
The anterior part of the worms was cup-shape and equipped with oral, ventral suckers, pseudosuckers, and tribocytic organ, and the posterior one was finger-like and round-ended.
The tegument of the anterior body was covered with 3-4 pointed small spines on the mid-ventral surface and 1-2 pointed ones on the lateral surface. Sensory papillae such as type II, dome-shape ones, and papillae with an opening were distributed over the ventral surface of the anterior portion.
The round tribocytic organ was bearing small stout spines laterally, whereas the surface which comes in contact with the host tissues consisted of numerous long fibrillar fibers. The lip of the oral sucker contained type II papillae. Lateral margin of the anterior body revealed type III papillae.
Figures
Figs. 1-4 Fig. 1. Whole worm view of adult P. kobayashii. Bar = 1 mm, ×36.
Fig. 2. Frontal view of the oral sucker. Bar = 10 µm, ×1,000.
Fig. 3. Ventrolateral view of the anterior end of the body showing the oral sucker (OS) and pseudo-suckers(PS). Bar = 10 µm, ×180.
Fig. 4. Ventral view of a pseudosucker's wall. ×600.
Figs. 5-10 Fig. 5. Anterior ventromedian surface of the anterior body showing densely packed spines, ×4,000.
Fig. 6. Anterior ventromedian surface of the anterior body showing type II papillae and those with an opening . ×4,000.
Fig. 7. Anterolateral surface of the anterior body showing densely packed spines and sensory papillae. ×1,000.
Fig. 8.Ibid. Note the spines diverged into 3-4 points and showing dome-shaped papillae(arrows). ×4,000.
Fig. 9.Ibid, higher magnification. ×10,000.
Fig. 10. Lateral margin of the anterior body showing type III papillae. ×4,400.
Figs. 11-16 Fig. 11. Lateral view of the anterior body showing the protruded tribocytic organ. ×100.
Fig. 12. Frontal view of the tribocytic organ. Bar = 10 µm, ×1,000.
Fig. 13. Middle portion of the tribocytic organ covered with fibrillar fibers. ×7,200.
Fig. 14. Mediolateral portion of the tribocytic organ. Note the spines among the fibrillar fibers. ×4,000.
Fig. 15. Lateral margin of the tribocytic organ. Note th sharp-edged spines more marked than Fig. 14. ×4,000.
Fig. 16. Far lateral margin of th tribocytic organ. Note the spines diverged into 2~3 points. ×4,000.
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