Abstract
The cephalic end of the type-species of the pharyngodonid genus Cithariniella, C. citharini Khalil, 1964, a parasite of African freshwater fishes, was studied by scanning electron microscopy. The mouth aperture was found to be triangular, surrounded by four large, elongate cephalic papillae and two small globular amphids; the presence of six oral lamellae was ascertained for the first time in this genus, indicating certain relationships between African and South and Central American pharyngodonid nematodes parasitising freshwater fishes. The paper includes a revised key to the pharyngodonid genera whose species are parasitic in fishes.
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References
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Moravec, F. Structure of the cephalic end in the genus Cithariniella Khalil, 1964 (Nematoda: Pharyngodonidae) as revealed by SEM, with a key to pharyngodonid genera from fishes. Syst Parasitol 27, 133–137 (1994). https://doi.org/10.1007/BF00012271
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DOI: https://doi.org/10.1007/BF00012271