This study follows a previous work on the taxonomic survey on tintinnids (Suborder Tintinnina) collected in subtropical waters of the Southern Brazil (22°S-34°S). Samples were based in different oceanographic cruises covering shelf and oceanic waters. Here, the species belonging to Families Dictyocystidae, Rhabdonellidae, Tintinnidae and Xystonellidae were described, and a general discussion regarding the tintinnid biogeography and the vertical distribution observed in some of the oceanographic cruises were carried out. For all of species the descriptions, measurements and drawings, as well comments on the taxonomy and results on horizontal and vertical distributions on the water column were furnished. The species richness was high (87 infrageneric taxa), and some species like Climacocylis scalaria, Eutintinnus spp., Salpingacantha spp., Salpingella spp. and Steenstrupiella gracilis were not previously recorded in the region. Nineteen species are new records for the Southwestern Atlantic Ocean.
Microzooplankton; Southwestern Atlantic Ocean; taxonomy
