Abstract
The ciliated protozoa, Pseudourostyla levis was collected from river Yamuna in Delhi (India). Morphometric characterization and cortical morphogenesis during the division cycle was investigated. The ciliate Pseudourostyla measures 274µm × 80 µm in protargol stained preparations. Cortical structures include buccal, frontal and somatic ciliature. The main morphogenetic events during division cycle in P. levisincludes, partial retention of parental adoral membranelles, dedifferentiation of parental midventral cirri to form frontoventral complex and formation of marginal rows on each side from a common marginal primordium. In the present study, the morphometric comparison of the present isolate with congeners is also presented.
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