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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, test 125 μm long, 84 μm wide, L/W=1.5, pseudostome 45 μm wide, x 640, Hikage marsh, Shiga highland, Yamanouchi town, Nagano Pref., Japan, June 19, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Heleopera Heleopera Heleopera
Test 116 μm long, 85 μm wide, L/W=1.4, pseudostome 50 μm wide, x 640
Heleopera Heleopera
Test μm long, μm wide, L/W=, pseudostome μm wide, x 640
Heleopera Heleopera
Test μm long, μm wide, L/W=, pseudostome μm wide, x 640
Heleopera Heleopera
Test 107 μm long, 72 μm wide, L/W=1.5, pseudostome 50 μm wide, x 640
Heleopera Heleopera
Test 120 μm long, 75 μm wide, L/W=1.6, pseudostome 40 μm wide, x 640
Heleopera Heleopera Heleopera


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