Difflugia schuurmani Van Oye, 1932
Diagnosis: Shell elongate ovoid; narrows from the middle towards the pseudostome and to the fundus. Pseudostome three-bladed; blades less pronounced than those of D. gramen, smaller, and pseudostome more open.
Dimensions: Length 50-85 µm, width 36-69 µm, diameter pseudostome 18-30 µm.
Ecology: Freshwater.
Zivkovicia compressoidea, from Jung, 1942 Zivkovicia compressoidea (Jung, 1942) Basionym: Pontigulasia compressoidea Jung, 1942 Diagnosis: Shell ovoid and compressed, without any constriction between neck and
Zivkovicia flexa, from Cash and Hopkinson, 1909 Zivkovicia flexa (Cash and Hopkinson, 1909) Ogden, 1983 Basionym: Pontigulasia compressa var. flexa Cash and Hopkinson, 1909 Diagnosis:
After Chardez, 1984 Lagenodifflugia epiouxi (Chardez, 1983) new comb. Basionym: Pontigulasia epiouxi Chardez, 1983 Diagnosis: Shell elongate, circular in cross-section or very slightly compressed. The
Centropyxis lapponica, after Grospietsch, 1954 Centropyxis lapponica Grospietsch, 1954 Diagnosis: Shell nearly circular in circumference, without spines. Aperture clear square with rounded corners. Shell viewed
Chaos spec., Crailoo, 2021 Chaos spec. This specimen was found in a samples from Crailoo, Netherlands. It was remarkable because of the absence of crystals.
Difflugia lobostoma parasitism I found this Difflugia lanceolata specimen in 2021, in the mud of a shallow pond. A parasite is present in the posterior