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Stentor coeruleus Tetrahymena thermophila Tetrahymena borealis Ichthyophthirius multifiliis Pseudocohnilembus persalinus Paramecium tetraurelia Paramecium dodecaurelia Pseudokeronopsis flava Pseudokeronopsis carnea Pseudourostyla cristata Halteria grandinella Stylonychia lemnae Oxytricha trifallax Euplotes aediculatus Euplotes octocarinatus Euplotes vannus Entodinium caudatum
0 300 600 900 1142 Time (MYA)
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