Difflugia praestans
D. praestans, 343 µm (Naardermeer, Netherlands)

Difflugia praestans Penard, 1905

Diagnosis: shell slightly yellow, large, long and straight, tubular, not compressed; fundus rounded with a short sharp spine or sometimes with two short spines. Nucleus vesicular, spherical, with one large central homogeneous nucleolus.

Dimensions: Length 350 – 420 µm (average 375 µm).

Ecology: Fresh water; sediment of deep waters.

Difflugia praestans
Difflugia praestans, Pénard Collection, Geneva – Photograph by Thierry Arnet, as part of the Pénard project.
These shells were prepared by Penard and labeled as “Difflugia praestans” (image from Mazei and Warren, 2012). Is it a separate species or just a variation?

Recent posts

Microcorycia spec. 4

Microcorycia spec. , folded Microcorycia spec.? I found this specimen in a sample from moss on a fallen tree in a marsh in the Naardermeer,

Read More »

Microchlamys spec.

Microchlamys spec., the same cell in lateral view Microchlamys spec. Diagnosis: Shell relatively high compared with all described species. The diameter is twice the height.

Read More »

Excentrostoma

Infraorder Excentrostoma Kosakyan et al., 2016   Diagnosis: Testate amoebae with an eccentrically placed aperture; test organic with few or many xenosomes. Family Centropyxidae Jung, 1942  

Read More »

Longithecina

Infraorder Longithecina Kosakyan et al., 2016   Diagnosis: Testate amoebae with a more or less tubular or cylindrical test and a terminal aperture; test with

Read More »