Studies on the free-living protozoan fauna of estuaries in the coastal zone of Tamil Nadu, India Author Bindu, L. text Records of the Zoological Survey of India 2021 121 1 61 75 journal article 10.26515/rzsi/v121/i1/2021/141506 2581-8686 13186453 57 . Tintinnopsis tocantinensis Kofoid & Campbell, 1929 Material examined : Mi-173, 5 ex. , Kaliveli estuary, 22.vi.2013 ;Mi-185, 6 ex. , Kaliveli estuary, 22.vi.2013 ;Mi-190, 4 ex. , Arasalar estuary, 07. xii. 2013 ; Mi-289, 11 ex. , Marakkanam estuary, 20.vii.2014 ; Mi-308, 6 ex. , Kaduviyar estuary, 11.x.2015 . Diagnosis : Lorica long and cylindrical, distal end bulb shaped and ends with a stout pointed horn; length 112µm. Distribution in India : Odisha , West Bengal , Tamil Nadu .