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Granuloreticulosea: Monothalamida: Amphitremidae

Amphitrema stenostoma
Nüsslin

Amphitrema Genus: Test ovoid, symmetrical, compressed, composed of a transparent membrane with or without adherent extraneous particles (Cash & Wailes, The British Freshwater Rhizopoda and Heliozoa vol. III, 1915).
Species: Test covered with many grains of quartz and various extraneous particles, 55-97 μm long, 31-74 μm wide; pseudostome lacking any collar, cytoplasm containing algal endosymbionts (Cash & Wailes, The British Freshwater Rhizopoda and Heliozoa vol. III, 1915).


Amphitrema stenostoma Nüsslin, test 75 μm long, 50 μm wide, L/W=1.5, x 640, No.3, Yahei-daira-shitsugen (Yahei-daira marsh), North of Higashidaiten, Azuma mountains, Yonezawa city, Yamagata Pref., Japan, July 1, 2007 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Amphitrema stenostoma Amphitrema stenostoma Amphitrema stenostoma

Amphitrema stenostoma Nüsslin, test 75 μm long, 62 μm wide, L/W=1.2, x 640, No.3, Yahei-daira-shitsugen (Yahei-daira marsh), North of Higashidaiten, Azuma mountains, Yonezawa city, Yamagata Pref., Japan, July 1, 2007 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Amphitrema stenostoma Amphitrema stenostoma
Test 78 μm long, 58 μm wide, L/W=1.3, x 400, x 640
Amphitrema stenostoma Amphitrema stenostoma
Test 80 μm long, 60 μm wide, L/W=1.3, x 400, x 640
Amphitrema stenostoma
Test 80 μm long, 63 μm wide, L/W=1.3, x 400, x 640
Amphitrema stenostoma Amphitrema stenostoma Amphitrema stenostoma

Amphitrema stenostoma Nüsslin, test 80 μm long, 60 μm wide, L/W=1.3, x 640, No.3, Yahei-daira-shitsugen (Yahei-daira marsh), North of Higashidaiten, Azuma mountains, Yonezawa city, Yamagata Pref., Japan, July 1, 2007 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Amphitrema stenostoma Amphitrema stenostoma Amphitrema stenostoma

Images of collecting locality: No.3, Yahei-daira-shitsugen (Yahei-daira marsh), North of Higashidaiten, Azuma mountains, Yonezawa city, Yamagata Pref., Japan, July 1, 2007 by Y. Tsukii


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