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 13. Difflugia urceolata Carter, 1864 Characters: Test ovoid-spherical, composed of angular quartz crystals and diatoms. Oral aperture circular; its collar around re-curved or rolled towards exterior. Distribution: India - Assam , Manipur and West Bengal .