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From the Bay of Villefranche in December 2013, lugol's-fixed specimen, Z-stack of images made using a 60x objective and DIC optics.
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Drawing from Claparde & Lachmann 1858 (Plate 8, figure 5) of the species now known as Steenstrupiella steenstrupii as "Tintinnus steenstrupii". The scale bar reflects the text description (pg 200) as about 0.2 mm in overall length. The species (and now genus) was presumably named after the Danish biologist Japetus Steenstrup (1813-1897).
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Specimen lugol's-fixed from the Ionian Sea.
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Eutintinnus (you-tin-tin-us), one of the tintinnid ciliates. These are mostly marine choreotrichs in which the cell is located within an open lorica which it drags around while it swims. The different genera and species are mostly distinguished by the different appearances of the lorica. This genus has a conical lorica which is open at both ends. With an adoral zone of membranelles located around the top end of the cell. Differential interference contrast.
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Eutintinnus (you-tin-tin-us), one of the tintinnid ciliates. These are mostly marine choreotrichs in which the cell is located within an open lorica which it drags around while it swims. The different genera and species are mostly distinguished by the different appearances of the lorica. This genus has a conical lorica which is open at both ends. With an adoral zone of membranelles located around the top end of the cell. Phase contrast.
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Lugol's fixed specimen
