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 100 μm 150 μm; x 400