Family: Scales round to elliptical, thin.
Genus: Test round or oval in cross-section; pseudostome terminal with dentate scales.
Species: Test oviform without spines, moderately compressed, 22-52 μm long, width 0.5-0.7 of the length; pseudostome circular, 6-12 μm diam.; body scales circular to broadly oval in shape, 5-8 in each row, 2.5-4 μm long (Cash & Herbert, 1915).

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s. = scales

E. rotunda or E. scutigera ? 60 x 25 μm L/W=2.4 s. 10 x 5 μm Scale; L/W= Hakama marsh Madarao highland Niigata, 2005	E. rotunda 53 x 36 μm L/W=1.5 s. μm φ Scale; L/W= Karakemi marsh Yasaka Nagano, 2005	E. rotunda 44 x 25 μm L/W=1.8 s. μm φ Scale; L/W= Shimizu-daira Nasu Tochigi, 2005	E. rotunda 45 x 24 μm L/W=1.9 s. μm φ Scale; L/W= rows Kawaguchi Natural p. Saitama, 2005
E. rotunda 45 x 21 μm L/W=2.1 s. 4.5 x 3 μm φ Scale; L/W= Hakama marsh Madarao highland Niigata, 2005	E. rotunda ? 40 x 18 μm L/W=2.2 s. μm Scale; L/W= rows Omine-numa Tsukiyono Gunma, 2003	E. rotunda ? 40 x 14 μm L/W=2.9 s. μm Scale; L/W= rows Omine-numa Tsukiyono Gunma, 2003	E. rotunda 50 x 27 μm L/W=1.9 s. μm φ Scale; L/W= Numa-no-hara m. Madarao highland Niigata, 2006

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