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Lobosea: Testacealobosia: Arcellinida: Centropyxidae

 Centropyxis aculeata ?
Ehrenberg, 1838

Centropyxis Genus: Test circular, ovoid or discoid; pseudostome eccentric, circular or ovoidal; with or without spines (Kudo, 1966).
Species: Test variable in shape and size; diameter 100-150 μm; pseudostome 50-60 μm; with 4-6 spines (?); opaque or semitransparent; with fine sand-grains or diatom shells (Kudo, 1966). 138-200 μm in diameter, 48-60 height; several spines; pseudostome 30-60 μm, recurved, invaginated (Illustrated Guide, 1985).

Centropyxis sp. (C. aculeata ?), test 140 μm long, 100 μm wide, L/W=1.4, pseudostome 35 μm long, 77 μm wide, spiny projections 25 μm long, x 400, x 640, a small pond at Obihiro University of Agriculture and Veterinary Medicine, Obihiro city, Hokkaido, Japan, October 13, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Centropyxis Centropyxis

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