For the first time a taxonomic and ecological study of species belonging to Helicostomella was performed over a mesoscale spatial distribution by examining ca. 3000 loricae collected in argentine shelf waters during the austral autumn. Microscopic and

The hyaline tintinnid Helicostomella subulata (Ehre.) Jorgensen, a dominant member of the summer-fall microzooplankton community in Bedford Basin, Nova Scotia, was cultured in the laboratory over 10 months, on a diet of microflagellates. The cultures

Tintinnids are a large group of planktonic ciliates with diverse morphologies. The range of variability in lorica shapes and sizes can be very high even within a single species depending on life stages and environmental conditions, which makes the delimitation