from China, length 202-274 µm

 

Acuminated Difflugia species

 

All shells were collected in a freshwater pond in China. This overview shows how difficult it is to distinguish between species.

a Difflugia scalpellum  

b Difflugia acutissima

c Difflugia distenda

d Difflugia bicruris = D. distenda?

e Unidentifiable