Euglypha brachiata Leidy, 1879
Diagnosis: Shell elongate, slightly constricted near the center, in cross-section round; fundus somewhat acute; pseudostome terminal bordered by a double row of 6-7 dentate scales; neck ornamented with 2-7 long recurved spines, arising from scales situated among the 3 rows adjoining the aperture; spines sometimes ribbon-shaped; body scales circular or sub-circular; nucleus large, placed posteriorly; cytoplasm and filopodia normal.
Dimensions: Leidy (1879): 104—128 µm long. Wailes (1915): length 92—120 µm; width 30—37 µm; aperture 12—15 µm; spines 60—65 µm. My measurements: 138 µm long.
Habitat: Submerged sphagnum, sediments. Rare species.
Infraspecific taxa.
E. brachiata librata Wailes, 1912
Differs from the typical form in that 2-4 parietal scales, bearing long spines directed backwards, are located in the middle part of the shell, and not in the area of the mouth, as in the typical form. The length of the shell is 100-104 µm, the width of the shell is 32-35, the diameter of the mouth is 13 µm, the length of the spines is 35-38 µm.
Remarks: Euglypha brachiata has been confused with E. acanthophora by Penard (1902) and others. However, I own an original slide, mounted by Penard, with the label Euglypha brachiata Leidy non Penard (see below):
