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The World of Protozoa, Rotifera, Nematoda and Oligochaeta

Ref ID : 7568

C.A. Groliere, Pierre de Puytorac, and R. Detcheva; [A Propos D'observations sur la Stomatogenese et L'ultrastructure du Cilie Protocruzia tuzeti Villeneuve-Brachon, 1940]. Protistologica XVI(3):453-466, 1980

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This species has 10-11 somatic kineties. They are formed by successive pairs of ciliated kinetosomes. The posterior kinetosome bears: a) a postciliary ribbon extending posteriad in a microtubular subpellicular bundle which lies along the right side of each kinetie, b) retrodesmal fibers, c) 1 or 2 transverse(s) microtubule(s), d) a catethodesma. The anterior kinetosome has only transverse fibers. The kinetosomes of the same pair are united by 2 types of desmoses. On the left side, buccal ciliature is formed by 6 adoral organelles. Each organelles composed by 2, 3 or 4 rows of kinetosomes. The posterior (right) row of each organelle has postciliary ribbons, the anterior one would have possibly transverse microtubules. Longitudinal, transversal and oblique desmoses connect the kinetosomes of an organelle and the different organelles are connected by a microfibrillar system. On the right side, paroral ciliature is composed by 2 rows of ciliated kinetosomes, connected by a microfibrillar system. Kinetosomes of the inner row bear postciliary microtubules. Some toxicysts (?) are present. The macronucleus consists of a cluster of several vesicles which surround the micronucleus in the center. A kinetosomal proliferation in the cortical region between the 1th and Nth Kineties, forms the adoral organelles. A distinct kinetosomal proliferation of the stomatogeneous 1 kinetic forms the paraoral organelle. A kind of scuticus is present. By the buccal and cortical ultrastructures Protocruzia belongs to the Heterotrichida. Some cortical characteristics are very similar inside Protocruzia, Loxodidae, Geleiidae, Climacostomoidea.