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Lobosea: Testacealobosia: Arcellinida: Difflugina: Heleoperidae

Heleopera petricola
Leidy var. major Cash 1909

Heleopera Genus: Test chitinous, coloured greyish-rose or deep purple, nearly allways rough with adhering sand-grains; pseudostome narrow, elliptic, notched in lateral view, frontal view of pseudostome more or less convex or truncated, with rounded corners; (Cash, The British Freshwater Rhizopoda and Heliozoa vol. II, 1909).
Species [ var. petricola ]: Test variable in shape, 80-100 μm long; lateral margins straight or slightly convex; pseudostome linear or elliptic.
[ var. major ]: Test colorless or lightish grey, 120-125 μm long; lateral margins nearly straight; pseudostome slightly less covex, but narrowed; (Cash, The British Freshwater Rhizopoda and Heliozoa vol. II, 1909).


Heleopera petricola var. major Cash ?, cell body μm long, μm wide, L/W=, x 640, No.3, Chigo-ike marsh (or Yakebitai marsh) at the top of Yakebitai mountain, Shiga highland (Oku-shiga highland), Yamanouchi town, Nagano Pref., Japan, July 20, 2008 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Heleopera petricola Heleopera petricola Heleopera petricola Heleopera petricola

Images of collecting locality: No.3, Chigo-ike marsh (or Yakebitai marsh) at the top of Yakebitai mountain, Shiga highland (Oku-shiga highland), Yamanouchi town, Nagano Pref., Japan, July 20, 2008 by Y. Tsukii


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