A study of the genus Trachelomonas Ehr. (Euglenophyceae) in 26 water bodies at Jacuí Delta State Park near the state capital of Rio Grande do Sul (29º56', 30º03'S; 51º12', 51º18'W) revealed nine new records of Trachelomonas species for this state, as follows: Trachelomonas abrupta Swir. emend. Defl. var. obesa (Playf.) Defl., T. conica Playf., Trachelomonas duquei Conf. & Nudelman, Trachelomonas megalacantha Cunha var. crenulatocollis Bour. & Manguin, Trachelomonas verrucosa Stockes var. granulosa (Playf.) Hub.-Pest., Trachelomonas zingeri Roll; three are new records for Brazil: Trachelomonas cylindraceae f. cylindraceae (Playf.) Pop., Trachelomonas helvetica Lemm. emend. Defl. and Trachelomonas splendidissima Middelhoek. Descriptions, illustrations, comments, geographic distribution and the range of environmental conditions in which each taxon was found are presented.
Trachelomonas; Euglenophyceae; new records; southern Brazil
