world of amoeboid organisms

Menu

Genus Pessonella Pussard, 1973

Diagnosis: Locomotive form flattened and broadly lingulate or fan-shaped. Anterior margin clear with many cone-like bosses on hyaloplasm. Floating form with blunt, cylindrical, and frequently bent pseudopodia. No posterior uroid. Cytoplasm finely granular without crystals. Nucleus spherical with 3 to 5 parietal nucleolar pieces. Reported from freshwater and compost.
Monospecific.
Type species: Pessonella marginata Pussard, 1973

Recent posts

Mrabella plicata

M. plicata, after Hoogenraad and De Groot, 1940 Mrabella plicata (Hoogenraad and De Groot, 1940) Diagnosis: Test made of small square plates, between which some

Read More »

Quadrulella alata

Q. alata, after Gauthier-Lièvre, 1957 Quadrulella alata  Gauthier-Lièvre, 1957 Diagnosis: In frontal view, the test is lageniform, with a broadly rounded fundus (subcircular or ovoid)

Read More »

Quadrulella acuminata

Quadrulella acuminata, after Van Oye, 1958 Quadrulella acuminata  Van Oye, 1958 Diagnosis: Test rather pyriform with a stretched base with converging sides, very slightly concave

Read More »

Hyalosphenia gigantea

H. gigantea, after De Graaf, 1952 Hyalosphenia gigantea De Graaf, 1952 Diagnose: The theca is perfectly hyaline as in all other species of the genus.

Read More »