image_list image_listE

Lobosea: Testacealobosia: Arcellinida: Arcellidae

 Arcella megastoma
(Penard 1902) emend Wailes 1913

Arcella Genus: Test variable, chitinoid; binucleate (Illustrated Guide, 1985).
Species: Diam. 180-360 μm, height 36-55 μm; pseudostome, round, 70-190 μm; with ring of pores (Illustrated Guide, 1985).

Arcella megastoma (Penard) emend Wailes, test 316 μm in diam., pseudostome about 160 μm wide, x 200, x 400, x 640, Toneri Park, Adachi-ku, Tokyo, Japan, November 27, 2005 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
Arcella megastoma Arcella megastoma Arcella megastoma Arcella megastoma Arcella megastoma

Arcella megastoma (Penard) emend Wailes, test 280 μm in diam., pseudostome 130 x 150 μm, x 200, x 400, x 640, Toneri Park, Adachi-ku, Tokyo, Japan, November 27, 2005 by Y. Tsukii
Arcella megastoma Arcella megastoma Arcella megastoma

Arcella discoides Ehrenberg, 1871: Diam. 90-150 μm, height 25-30 μm; pseudostome, round, 30-40 μm; with or without ring of pores (Illustrated Guide, 1985).

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