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The World of Protozoa, Rotifera, Nematoda and Oligochaeta

Microcorycia

Microcorycia Cockerell (ref. ID; 1618)

ref. ID; 1618

Test discoidal or hemispherical, flexible, with a diaphanous continuation or fringe around periphery, being folded together or completely closed; crown of test with circular or radial ridges; body does not fill the test; one to two nuclei; pseudopodia lobular or digitate; fresh water. (ref. ID; 1618)

ref. ID; 1923

Aperture with a membranous frame. (ref. ID; 1923)
  1. Microcorycia bryophila Decloitre (ref. ID; 5112 original paper)
  2. Microcorycia flava (Greeff) (ref. ID; 1618), (Greeff) Cockerell (ref. ID; 3595) or Cockerell (ref. ID; 1923)
  3. Microcorycia husvikensis Beyens & Chardez, 1997 (ref. ID; 2818 original paper)

Microcorycia flava (Greeff) (ref. ID; 1618), (Greeff) Cockerell (ref. ID; 3595) or Cockerell (ref. ID; 1923)

Descriptions

Test yellowish brown; crown with few small foreign bodies; endoplasm with yellowish brown granules; two nuclei; contractile vacuoles; in moss. (ref. ID; 1618)

The membranous covering is dome-shaped but very changeable in form. Pseudopods short and thick. Habitat mosses. (ref. ID; 1923)

Measurements

Diameter 80-100 µm; young individuals as small as 20 µm. (ref. ID; 1618)

Diameter 80-100 µm. (ref. ID; 1923)

Microcorycia husvikensis Beyens & Chardez, 1997 (ref. ID; 2818 original paper)

Descriptions

In side view the shell looks basin-shaped, with a flattened or slightly bulged (swelled) top, forming thus a short conical cylinder, open at the base. The shell wall is composed of a yellowish organic layer. At great magnifications fine alveoli are visible. The shell membrane consists of two agglutinated layers, which are separated near the base. One of these layers forms a thin and hyaline extensive membrane, which is in a circular way displayed around the shell. It can also be transformed like a sail, or be folded to reduce the opening at the base. In our samples, the amoeba fixed with formalin looks like a globular mass attached to the interior wall opposite the opening. The cytoplasm is finely granulated, grey, with an easily observed spherical nucleus containing a central nucleus. (ref. ID; 2818)

Measurements

Diameter of shell 32-34; diameter of the nucleus 2-2.4; diameter of the contracted cytoplasm 18; diameter of the extended membrane 38-40; height of the shell 16-18 µm (n=20). (ref. ID; 2818)