Tintinnids play an important role in the microbial food web and consist of neritic and oceanic ones biogeographically. Neritic tintinnid species are mainly present in continental shelf areas. Knowing their community structure is thus critical to better

Samples of the tintinnid genus Cymatocylis were collected at an oceanic site near South Georgia in January 1990. The shapes and sizes of loricae observed included most forms previously reported by other authors and were representative of the entire genius.

An investigation of large tintinnids was carried out during the Arctic-Antarctic cruise aboard the S/V "Croatian Tern" in the period from 1994 to 1997. Samples were collected at 33 stations by vertical tows with a Nansen net with a 53 µm mesh size in