Euglypha strigosa
Euglypha strigosa, 58 µm

 

 

Euglypha strigosa (Ehrenberg, 1848)

 

Diagnosis: shell ovoid, laterally compressed, and composed of oval shell-plates; siliceous spines may project from the junctions of the shell-plates either singly or in pairs, randomly distributed over the whole of the body surface and varying in both size and shape; spines are held in position by organic cement and are often dislodged in preparation; aperture circular and surrounded by ten to thirteen denticulate apertural-plates; each apertural-plate is roughly oval, thickened at the denticulate margin, and carries a large median tooth with either three of four smaller teeth on each side; nucleus large with one or a few small nucleoli; plasma and filopodia normal.

 

Dimensions: literature 60-100 µm.

 

Ecology: Sphagnum and other mosses, also in sediments and between water plants.

 

Remarks: In clonal cultures abnormal forms with a curved neck have been seen. In wild populations differences in shell size and shape were suggested by Chardez and Leclercq (1963) to be related to the type of habitat.
Several fairly stout spines, which project singly or pairwise from the junctions of the shell platelets. Plates thickened, on the anterior end usually broadly rounded, with one median tooth bent sharply towards the interior of the mouth, and 2-4 pairs of lateral teeth, whose size decreases from the center to the edge. Nucleus with a central nucleolus.

 

Euglypha strigosa, from Wailes, 1915
Eyglypha ciliata
Euglypha ciliata
Aperture scales in side view and oral view
Euglypha strigosa
Euglypha strigosa, after Lueftenegger et al, 1988
Euglypha strigosa
Euglypha strigosa, 58 µm
Euglypha strigosa
Euglypha strigosa, 58 µm; same specimen as above
Euglypha strigosa
Euglypha strigosa
Euglypha strigosa, 72 µm
Euglypha strigosa
Euglypha strigosa, 101 µm