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The World of Protozoa, Rotifera, Nematoda and Oligochaeta

Ref ID : 7754

Guy Brugerolle; [Des Trichocystes chez les Bodonides, Un Caractere Phylogenetique Supplementaire entre Kinetoplastida et Euglenida]. Protistologica XXI(3):339-348, 1985

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A fresh-water Bodonid with an anterior rostrum that acts a a cytostome-cytopharynx and two typical flagella (one anteriorly directed, the other posteriorly) is considered as a member of the genus Rhynchobodo Lackey, 1942. The ultrastructural study shows that this polykinetoplastic species exhibits both bodonids features (Brugerolle et al. 1979) and the rod-like trichocysts reported in the euglenids Entosiphon and Isonema. When ejected, the trichocyst wall has the shape of a cylinder made of 24 longitudinal fibres around which helicoidal fibres are tightly twisted thus giving a lattice pattern. Two other bodonids species with similar trichocysts are studied. One of them is characterized by the occurrence of a typical kinetoplast. Such lattice-trichocysts may be considered as a common feature of Kinetoplastida au Euglenida that is therefore added to the list of the following characters previously reported (Kivic and Walne 1984): paraxial rod and long transition zone of flagella, sub-pellicular microtubules, three independant fibres at the level of the flagellar pocket, similar fibres in the cytopharyngial complex, mitochondrial network with discoidal cristae, close mitosis with an intranuclear spindle.