Euglypha acanthophora (Ehrenberg, 1841)
Diagnosis: shell ovoid or slightly elongated towards the aperture, not compressed; fundus with 1-9 long, usually a little bended spines, which are in fact elongated scales; aperture circular, bordered by up to three rows of serrated scales; body scales elliptical or nearly circular with a tooth-like projection on the posterior edge; plasma and pseudopodia normal.
Dimensions: literature 55-84 µm; my measurements 66-97 µm
Ecology: Sphagnum and other mosses, also in sediments and between waterplants.
Remarks: The scales are scutiform, with a small tooth-like projection on the posterior part. The spines are elongated shell scales, tapering towards a sharp point.