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Originally described by Ehrenberg under the name Chlamidodon mnemosyne.
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Chlamydodon mnemosyne
From the collection
Ciliates from Ehrenberg -- 1838
| Description of Chlamydodon mnemosyne: These ciliates are 75-96 microns long with an average breadth of 50-55 microns. The thigmotactic striated band on the ventral side of the organisms is referred to as a 'rail-road track'. This structure forms a continuous band, about 5-6 microns wide, that circumscribes the full perimeter of the cell. The organisms are fully ciliated on the ventral surface but have a short, single row of cilia on the dorsal side. The cells have 32-37 somatic ciliary rows (kineties) plus the short one on the dorsal side. The short kinety has three to four rows of three kinetosomes. These rows are arranged as if they constitute a single split line. The somatic kineties on the right side of the ventral surface bend above the oral aperture, whilst those on the left present a straighter course along the surface. There is a suture where both sets of somatic kineties meet. The oral area has one pre-oral kinety, and two peri-oral kineties. There are four post-oral kineties. The number of contractile vacuoles varies from five to seven, normally three on the right and two on the left side of the cell. Organisms with five have the contractile vacuole pores opening at kineties 9, 10, 12, 24, and 27. Close examination (with Nomarski interference contrast light microscopy) of the oral area shows a large cytopharynx reinforced by robust nematodesmata that plunge into the cytoplasm developing a long cytopharyngeal basket. The nematodesmata vary in number between individuals of the same population, from 10 to 14, with 12 as the typical number. The nuclear apparatus includes one macronucleus and four or five micronuclei. |
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