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 24. Cyclopyxis kahli (Deflandre, 1929) Material examined : Mi-451, 5 ex. , Marakkanam estuary, 22.vi.2013 . Diagnosis : Test yellowish, circular in ventral and dorsal view, in lateral view hemispherical; aperture centered, distinctly invaginated, roughly circular with irregular edge, xenosomes present; test diameter 70-85µm. Distribution in India : Assam , Himachal Pradesh , Mizoram , Tamil Nadu (present record), Uttarakhand , West Bengal .