D. pyriformis , all from the same location, 290-297 µm – Nunspeet, oligotrophic pond

 

Difflugia pyriformis Perty, 1849

Description: These shells come from an oligotrophic pond near the city of Nunspeet and an eutrophic pond near Hilversum. The shells were build from relatively large sand grains. The nucleus was filled with a large number of more or less spherical nucleoli of different sizes.

Difflugia pyriformis
Nucleus, 43 µm in diameter – Nunspeet
Pyxidicula patens
Pyxidicula patens
Nucleus, with two different DOF, 56 µm in diameter – from ‘s-Graveland
Difflugia pyriformis
Shell, from ‘s-Graveland

     

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