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Lobosea: Testacealobosia: Arcellinida: Difflugiidae

 Difflugia acuminata
var. curvata Cash 1909

Difflugia acuminata Genus: Pseudostome lacks lobed collar; test round or oval in cross-section; with or lacking a collar (Illustrated Guide, 1985).
Species: Size, 200-400 μm long, 55-100 μm diam; test, cylindroid, narrowed toward pseudostome, tapered at base to spinelike tip; round cross-section; clear; imbedded quartz particles. Pseudostome truncate, round 40-90 μm, no neck, no collar (Illustrated Guide, 1985).
[ var. curvata ]: Test pyriform, curved, with a short cylindrical neck, a blunt mamillary projection on the crown, 240 μm long, 110 μm wide (Cash, The British Freshwater Rhizopoda and Heliozoa vol. II, 1909).

Difflugia acuminata var. curvata Cash or D. claviformis?, cell body μm long, μm wide, L/W=, x 400, x 640, No.2, Kannon-numa Forest Park (pond), Shimogo town, Fukushima Pref., Japan, November 15, 2008, by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400 : scale 31 μm scale 63 μm scale 94 μm; x 640
Difflugia Difflugia Difflugia Difflugia Difflugia Difflugia

Difflugia accuminata Ehrenberg , cell body μm long, μm wide, L/W=, x 640, No.11, Kannon-numa Forest Park (pond), Shimogo town, Fukushima Pref., Japan, November 15, 2008, by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400 : scale 31 μm scale 63 μm scale 94 μm; x 640
Difflugia accuminata Difflugia accuminata Difflugia accuminata

Images of collecting locality: No.2, Kannon-numa Forest Park (pond), Shimogo town, Fukushima Pref., Japan, November 15, 2008, by Y. Tsukii

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