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Description of Tintinnopsis urnula

Protoplast approximately spherical, diameter 3.5 microns. Single flagellum 4 microns long. Collar composed of approximately 25 tentacles around 2.5 microns long. Lorica barrel-shaped 10 microns long, separated into two chambers. Posterior lorica chamber 3 microns long x 5 microns wide. Anterior lorica chamber 7 microns long and 8 microns wide, transversed by 15-17 longitudinal costae. The anterior chamber is encircled by 4-5 transverse costae where it has its maximum diameter, and terminated by bands of obliquely orientated costal strips; anteriorly about 14 and posteriorly about 25.


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Source: BioPedia

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