Arcella megastoma Penard, 1902

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

9. Arcella megastoma Penard, 1902

Material examined: Mi-129, 3 ex., Karaikkal estuary,

02.vii.2012; Mi-198, 5 ex., Kaduviyar estuary, 06.xii.2013; Mi-214, 3 ex., Coleron estuary, 06.xii.2013; Mi-219; 6 ex., Arasalar estuary, 06.xii.2013; Mi-253; 4 ex., Kaliveli estuary, 21.vii.2014; Mi-264; 3 ex., Vettar estuary,

20.vii.2014.

Diagnosis: Shell very flattened with a wide aperture; ratio diameter aperture/shell usually 0.45-0.53; with 2 to 200 nuclei; measurements 160-301 µm, diameter of aperture 87-190 µm.

Distribution in India: Andhra Pradesh, Himachal Pradesh, Tamil Nadu (present record).