|  Genus: Test elastic, punctate; pseudostome round; 
few plate-like attached particles (Illustrated Guide, 1985).  
Envelope (test) thin, hyaline, changeable with body form; usually elongate-oval 
with rounded posterior end; narrowed at other half; envelope finely punctated with a few small plates; 
aperture round; cytoplasm clear (Kudo, 1966). Species:
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