Arcella discoides Ehrenberg, 1843

Bindu, L., 2021, Studies on the free-living protozoan fauna of estuaries in the coastal zone of Tamil Nadu, India, Records of the Zoological Survey of India 121 (1), pp. 61-75 : 64

6. Arcella discoides Ehrenberg, 1843

Material examined: Mi-116, 7 ex., Marakkanam estuary,

05.vii.2012; Mi-135, 5 ex., Vellar estuary, 08.i.2013; Mi- 151, 5 ex., Karaikkal estuary, 19.vi.2013; Mi-162, 5 ex., Coleron estuary, 21.vi.2013; Mi-193, 7 ex., Arasalar estuary, 07.xii.2013;Mi-212, 4 ex., Coleron estuary,

08.xii.2013; Mi-231, 7 ex., Pulicat lake , 04.xii.2013; Mi-250, 8 ex., Kaliveli estuary , 21.vii.2014.

Diagnosis: Test brown in colour; outline smooth, circular in front view and planoconvex in lateral view; height of the dome about one fourth to one third of the diameter of the test; oral aperture at the centre, large and circular; diameter of the test 100-160µm and aperture diameter 40- 60µm.

Distribution in India: Assam, Andhra Pradesh, Arunachal Pradesh, Chandigarh, Himachal Pradesh, Kerala (Nilgiri Biosphere Reserve), Manipur, Meghalaya, Mizoram, Nagaland, Sikkim, Tamil Nadu, Tripura, Uttarakhand, West Bengal.