Analyses of the morphometry of 630 loricae belonging to the described species Cymatocylis affinis and Cymatocylis convallaria retrieved from 21 samples collected in the Weddel Sea (6O–73�S) strongly suggest that both taxa, including the four formae into

Discocilia are observed in the marine ciliate Cymatocylis convallaria fixed with formalin, osmium in sublimate, and glutaraldehyde. They are restricted to the oral ciliature, while the somatic cilia have a normal, cylindrical profile. The swelling of

We characterized six tintinnid ciliates from Antarctic waters using molecular markers and morphological traits: Amphorellopsis quinquealata, Codonellopsis gaussi, Cymatocylis convallaria, Cy. calyciformis, Cy. drygalskii, and Laackmanniella prolongata.

We characterized six tintinnid ciliates from Antarctic waters using molecular markers and morphological traits: Amphorellopsis quinquealata, Codonellopsis gaussi, Cymatocylis convallaria, Cy. calyciformis, Cy. drygalskii, and Laackmanniella prolongata.

Discocilia are observed in the marine ciliate Cymatocylis convallaria fixed with formalin, osmium in sublimate, and glutaraldehyde. They are restricted to the oral ciliature, while the somatic cilia have a normal, cylindrical profile. The swelling of

Tintinnids (Ciliophora) are important microzooplankton grazers. In the Southern Ocean, they are found in the Antarctic Zone, Polar Front and Subantarctic Zone. The Antarctic Zone encompasses large gyres (Weddell Gyre and Ross Gyre) and the Antarctic Slope