Sexangularia
S. minutissima, from Deflandre, 1931

 

 

Genus Sexangularia Awerintzew, 1906

 

Diagnosis: test organic, sometimes with attached mineral particles; cross-section polygonal, mostly hexagonal. Nucleus vesicular.

Sexangularia minutissima (Penard, 1904) Awerintzew, 1906