 
 
|  Genus: Pseudostome lacks lobed collar; test round or oval in cross-section; 
pseudostome relatively large, with or lacking a collar (Illustrated Guide, 1985). Species: 70-110 μm long; 55-85 μm diam.; test oval, round cross-section; brown, chitinoid, with imbedded siliceous plates, attached debris (Illustrated Guide). 
 
 | 
 50 μm
 50 μm
 100 μm
 100 μm
 150 μm; x 400 :
 150 μm; x 400 : 
 31 μm
 31 μm
 63 μm
 63 μm
 94 μm; x 640
 94 μm; x 640
 
 
