Arcella hemisphaerica Perty, 1852

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

8. Arcella hemisphaerica Perty, 1852

Material examined: Mi-197, 4 ex., Arasalar estuary,

07.xii.2013; Mi-207, 2 ex., Arasalar estuary , 08.xii.2013; Mi-213, 3ex., Coleron estuary , 08.xii.2013; Mi-232, 3 ex., Pulicat lake , 04.xii.2013; Mi-263, 2 ex., Vettar estuary ,

20.vii.2014.

Diagnosis: Shell brown and slightly oval in apertural view; hemispherical in lateral view; shell surface having slight depressions; aperture invaginated and bordered by a lip; more than 2 nuclei present; diameter of test 42-90 µm; aperture diameter 15 to 20 µm.

Distribution in India: Assam, Andhra Pradesh, Manipur, Odisha, Tamil Nadu (present record), West Bengal.