Abstract
The development of the ventral papillae ofNotocotylus triserialis was studied by light and electron microscopy. The median row papillae first appeared on 2-day-old worms and the lateral rows on 4-day-old worms. The papillae grew in size and in number and size of constituent cells, with rapid development occurring between days 5 and 8. This rapid growth corresponded with the time of onset of egg production by the worm.
Electron microscopy indicated that the papillae of 3- and 4-day-old worms contained numerous undifferentiated cells with little cytoplasm and extensive Golgi bodies. By days 5 and 6 most of these cells contained developing mitochondria; only a few undifferentiated cells were visible. Muscles and nervous tissue also became more prominent at this time. The ultrastructure of the papillae of 7-and 8-day-old worms was similar to that of papillae from adult worms. After day 9 or 10, the size and number of cells per papilla remained constant until the death of the worm.
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MacKinnon, B.M. The development of the ventral papillae ofNotocotylus triserialis (Digenea: Notocotylidae). Z. Parasitenkd. 68, 279–293 (1982). https://doi.org/10.1007/BF00927406
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DOI: https://doi.org/10.1007/BF00927406