image_list image_listE

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, 75 μm wide, L/W=1.7, pseudostome 45 μm wide, x 400, x 640, No.1, Tanohara marsh, Shiga highland, Yamanouchi town, Nagano Pref., Japan, June 17, 2007 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Heleopera petricola Heleopera petricola Heleopera petricola Heleopera petricola Heleopera petricola
test 115 μm long, 72 μm wide, L/W=1.6, pseudostome 33 μm wide, x 640
Heleopera petricola Heleopera petricola

Images of collecting locality: No.1, Tanohara marsh, Shiga highland, Yamanouchi town, Nagano Pref., Japan, June 17, 2007 by Y. Tsukii

Please click on images for viewing enlarged.
Copyright Protist Information Server