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Lobosea: Testacealobosia: Arcellinida: Centropyxidae

 Centropyxis constricta
(Ehrenberg, 1841)

Centropyxis constricta Genus: Test circular, ovoid or discoid; pseudostome eccentric, circular or ovoidal; with or without spines (Kudo, 1966).
Species: Test 120-150 x 75-100 μm, 60-75 μm in hight, pouch-shaped in oral view, round in lateral, tapered toward anterior; pseudostome 25-30 μm with incurved lips; several similar species (Illustrated Guide, 1985).

Centropyxis constricta (Ehrenberg) ?, test 88 μm long, 75 μm wide, L/W=, pseudostome 23 μm long, 47 μm wide, L/W=, x 640, No.4, Chigo-ike (marsh pond) at the top of Yakebitai mountain, Shiga highland (Oku-shiga highland), Yamanouchi town, Nagano Pref., Japan, October 9, 2006 by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400
Difflugia constricta Difflugia constricta

Images of collecting locality: No. 4, Chigo-ike marsh at the top of Yakebitai mountain, Shiga highland (Oku-shiga highland), Yamanouchi town, Nagano Pref., Japan, October 9, 2006 by Y. Tsukii

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