Comparative ultrastructural study reveals distinct subcortical vesicles in two sympatric Condylostoma ciliates, indicating species-specific variation in cellular architecture.
SUMMARY Some differences at the ultrastructural level have been demonstrated between two sympatric species of Condylostoma (Ciliata Heterotrichida): C. magnum Spiegel and C. arenarium Spiegel. The most relevant differences are those concerning the subcortical structures described as vesicles and bodies, some of which, namely the mucocyst-like vesicles (mv) are present in both species. Two other types of such subcortical structures called rod-shaped bodies (rsb) and granular vesicles (gv) are found only in C. magnum and C. arenarium respectively. A cytochemical analysis of these structures has also been attempted. The results obtained on the two species are compared and discussed in relation to reports for other heterotrich ciliates.
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Rosati et al. (2013) studied this question.
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