Sphenoderia pseudominuta
S. pseudominuta, from Chatelain et al, 2013

Sphenoderia pseudominuta Chatelain, Meisterfeld, Roussel-Delif and Lara 2013

Diagnosis: Test acrostome, colorless, rounded, with similar sized ovoid plates; collar scales well-visible under scanning electron microscopy and high power LM; nucleus vesicular.
Very similar to Sphenoderia minuta, except that the scales are slightly smaller and less elongated.

Dimensions: Test length: mean 33.6 µm, width: mean 21.1 µm, length of the collar: mean 4.2 µm, width of the collar (inner): c. 10.1 µm, width of the collar (outer): 9.8 µm. Scale dimensions: 9.3 µm length and 6.2 µm width, as measured over 16 scales from 9 individuals.

Ecology: Sphagnum, Belgium.

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 »