Family: Scales round to elliptical, thin.
Genus: Test round or oval in cross-section; pseudostome terminal with dentate scales.
Species: Test elongate-oviform with hemispherical crown, not compressed, 45-100 μm long, 24-50 μm wide; pseudostome circular, 10-20 μm diam.; body scales circular to broadly oval in shape, 8-12 in each row, 10-16 μm long (Cash & Herbert, 1915).

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s. = scales

Scales more than 10 μm in diam.
E. tuberculata or E. brachiata ? 115 x 54 μm Test; L/W=2.1 s. 15 x 15 μm Scale; L/W=1.0 rows Hakama marsh Madarao highland Niigata, 2005	E. tuberculata 100 x 57 μm Test; L/W=1.8 s. 10.5 x 8.5 μm Scale; L/W=1.2 rows Onnenai Kushiro marsh Hokkaido, 2005	E. tuberculata 87 x 45 μm Test; L/W=1.9 s. 10-12 x 8 μm Scale; L/W=1.3-1.5 12 rows Showa-machi G.M. Showa Saitama, 2003	E. tuberculata 90 x 37 μm Test; L/W=2.4 s. 12-14 x 7-9 μm Scale; L/W=1.6 ? rows Nagaike park Hachioji Tokyo, 2005
E. tuberculata ? 70 x 35 μm Test; L/W=2.0 s. 12 x 6 μm Scale; L/W=2.0 Nidanuma Tsuchiyu-onsen Fukushima, 2005	E. tuberculata ? 79 x 41 μm Test; L/W=1.9 s. 10 x 5.5 μm Scale; L/W=1.8 15 rows ? Imou bog Toyohashi Aichi, 2004	E. tuberculata 76 x 44 μm Test; L/W=1.7 s. 11 x 8 μm Scale; L/W=1.4 ? rows Chaya-numa p. Fukushima Fukushima, 2005	E. tuberculata 69-76 x 40-42 μm Test; L/W=1.7-1.9 s. 8-11 x 6-9 μm Scale; L/W=1.2-1.4 ? rows Tokachi river Obihiro Hokkaido, 2005
E. tuberculata 66 x 38 μm Test; L/W=1.7 s. 10 x 8 μm Scale; L/W=1.3 Toyonodai park Otone Saitama, 2006	E. tuberculata ? 50 x 29 μm Test; L/W=1.7 s. 11 x 8 μm Scale; L/W=1.4 Nidanuma Tsuchiyu-onsen Fukushima, 2005
Scales 8-10 μm in diam.
E. tuberculata ? 80 x 51 μm Test; L/W=1.6 s. 8 x 3.5 μm Scale; L/W=2.3 28 rows ? Imou bog Toyohashi Aichi, 2004	E. tuberculata 66 x 40 μm Test; L/W=1.7 s. 9 μm φ Scale; L/W=1.0 10 rows Japan, 1998	E. tuberculata 70 x 31 μm Test; L/W=2.3 s. 9 x 8 μm Scale; L/W=1.1 rows near Watarase wetland Oyama Tochigi, 2005	E. tuberculata 68 x 33 μm Test; L/W=2.1 s. 9 μm Scale; L/W=1.0 10 rows Hanyu Saitama, 2003
E. tuberculata 66 x 33 μm Test; L/W=2.1 s. 9 x 7 μm Scale; L/W=1.3 Kannon-numa Hanyu Saitama, 2003	E. tuberculata 63 x 31 μm Test; L/W=2.0 s. 8 μm φ Scale; L/W=1.0 rows Japan, 1998	E. tuberculata 60 x 33 μm Test; L/W=1.8 s. 9 x 7 μm Scale; L/W=1.3 9 rows ? Japan, 1999	E. tuberculata 60 x 35 μm Test; L/W=1.7 s. 9 x 5.5 μm Scale; L/W=1.6 rows Fujimi Saitama, 2004
E. tuberculata 61 x 30 μm Test; L/W=2.0 s. 9 μm φ Scale; L/W=1.0 10 rows Japan, 1998	E. tuberculata 66 x 30 μm Test; L/W=2.2 s. ?? μm Scale; L/W=? ? rows Uruguay, 1999	E. tuberculata 63 x 33 μm Test; L/W=1.9 s. 8 μm φ Scale; L/W=1.0 8 rows Nan-ko Shirakawa Fukushima, 2003	E. tuberculata 57,74 x μm Test; L/W=1.8 s. 10 x 8 μm Scale; L/W=1.3 9 rows Kawaguchi Natural p. Kawaguchi Saitama, 2005
E. tuberculata 62 x 35 μm Test; L/W=1.8 s. 9 x 7 μm Scale; L/W=1.3 12 rows Mizuko Fujimi Saitama, 2003	E. tuberculata 58,62 x μm Test; L/W=1.9,2.0 s. 9-10 x 8 μm Scale; L/W=1.1,1.3 rows Tane-ike Togakushi highland Nagano, 2005	E. tuberculata 60 x 32 μm Test; L/W=1.9 s. 10 x 7 μm Scale; L/W=1.4 12 rows water treatment c. Sakado Saitama, 2003	E. tuberculata 59 x 32 μm Test; L/W=1.8 s. 9 x 8 μm Scale; L/W=1.1 9 rows Showa-machi G.P. Showa Saitama, 2003
E. tuberculata 57 x 31 μm Test; L/W=1.8 s. 9 x 7 μm Scale; L/W=1.3 rows Sagiyama m.p. Saitama Saitama, 2005	E. tuberculata 55 x 34 μm Test; L/W=1.6 s. μm Scale; L/W= rows Tsutsuji-ga-oka Tatebayashi Gunma, 2006	E. tuberculata 58 x 35 μm Test; L/W=1.7 s. μm Scale; L/W= rows Kumakubo Nasu-shiobara Tochigi, 2005	E. tuberculata 48 x 37 μm Test; L/W=1.3 s. μm φ Tsutsuji-ga-oka p. Tatebayashi Gunma, 2006
E. tuberculata 48 x 21 μm Test; L/W=2.3 s. 7-8 μm φ Scale; L/W=1.0 8 rows Uruguay, 1999	E. tuberculata 44 x 24 μm Test; L/W=1.8 s. 8.5 μm φ Scale; L/W=1.0 8 rows Senjo-ga-hara Nikko Tochigi, 2003
Scales 6-8 μm in diam.
E. tuberculata 74 x 44 μm Test; L/W=1.7 s. 8 x 5 μm φ Scale; L/W=1.6 Tanohara marsh Shiga highland Nagano, 2007	E. tuberculata 55 x 30 μm Test; L/W=1.8 s. 6 μm φ Scale; L/W=1.0 rows Saitama, 1999	E. tuberculata 39-42 x 21 μm Test; L/W=1.9-2 s. 6.5 μm φ Scale; L/W=1.0 rows Mizuko-kaizuka p. Fujimi Saitama, 2003	E. tuberculata 50 x 20 μm Test; L/W=2.5 s. 6 μm φ Scale; L/W=1.0 7 rows near Imou marsh Toyohashi Aichi, 2004
E. tuberculata 50 x 19 μm Test; L/W=2.6 s. 7 μm φ Scale; L/W=1.0 ? rows Suiren-numa Hakkoda mountain Aomori, 2005	E. tuberculata 44 x 24 μm Test; L/W=1.8 s. 7.5 μm φ Scale; L/W=1.0 8 rows ? Kannon-numa Shimogo Fukushima, 2005	E. tuberculata 59 x 30 μm Test; L/W=2.0 s. ellipsoid, 6-7 μm Scale; L/W=1.0 9 rows Japan, 1998	E. tuberculata 56 x 36 μm Test; L/W=1.6 s. 6 μm φ ? Scale; L/W=1.0 12 rows Kejo-numa Furukawa Miyagi, 2003
Scales less than 6 μm in diam.
E. tuberculata 44 x 20 μm Test; L/W=2.2 s. 4 μm φ Scale; L/W=1.0 10 rows Japan, 1998

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