Testate amoebae (Protozoa: Rhizopoda) of Deepor Beel (a Ramsar site), Assam, northeastern India Author Sharma, B. K. Author Sharma, Sumita text Journal of Threatened Taxa 2011 2011-07-26 3 7 1947 1950 http://threatenedtaxa.org/index.php/JoTT/article/view/1210 journal article 10.11609/JoTT.o2664.1947-50 0974-7907 5032152 1. Arcella discoides Ehrenberg, 1843 Characters: Test yellow, smooth, flattened, circular in front view and plano-convex in lateral view; height about 1/3 to 1/4 of its diameter. Oral aperture large and circular. Distribution: India - Assam , Meghalaya , Mizoram , Arunachal Pradesh , Tripura , Nagaland , Sikkim and West Bengal .