Rhizaspis spec.
Rhizaspis spec.
Rhizaspis spec., with minute spines (arrows)
 

Rhizaspis spec.

Diagnosis: Sometimes I find specimens of R. scutiformis and R. marginata, with minute spines along the edge and the fundus region. The spines originate from minute conical protrusions. Maybe these spines are species specific, but maybe they are only present under certain conditions.

Rhizaspis
Rhizaspis
Arrows point to some spines, detail
Rhizaspis spec.
Rhizaspis spec.
Arrows point to some spines. Test with spines at the fundus.
Plagiophrys spec.
Plagiophrys scutiformis with some spines at the edge – Neer-river, Limburg.
Plagiophrys scutiformis
The same cell as before, but now with some distinct dots at the fundus. These dots are spines.
Plagiophrys scutiformis
Test 52 µm – Neerriver, Limburg
Recent posts

Difflugia key ovoid

Difflugia Ovoid Group Key characters: Test ovoid, in cross section rounded. Pseudostome circular. 1 Test with collar or short neck 2 1′ Test without collar

Read More »

Difflugia: ovoid tests

Difflugia – group 1 Test < 60 µm. Test in cross section rounded. Test with rounded fundus. Pseudostome with smooth circular edge. Test not spherical

Read More »

Difflugia ampla

Difflugia ampla, after Rampi, 1950 (l) and Gauthier-Lièvre et Thomas, 1958 (r) Difflugia ampla Rampi, 1950 Diagnosis: Test broadly pyriform, with a wide and rounded

Read More »