Microworld

world of amoeboid organisms

Menu
Apogromia-verbrugghei
Apogromia-verbrugghei
A. verbrugghei

Genus Apogromia De Saedeleer, 1934

Diagnosis: Test hyaline, small, flask-shaped, with single terminal aperture, with or without a distinct neck; outline circular, sometimes irregular or angular. No septum. Test composed of an organic material without any embedded xenosomes; color usually yellow-brown till dark-brown. Cytoplasm with symmetrical bundle of granulopodia (peduncle or “Pseudopodienstiel”), very thin, suppressed to the substrate and able to branch and anastomose, thus forming a network or reticulum. Nucleus relatively large, globular with a central nucleolus. One contractile vacuole.

Ecology: freshwater and marine; shallow, ironrich water, Spagnum.

Remarks: the main difference between Microgromia and Apogromia is the presence of a septum in the first one. De Saedeleer describes three species, but I’m unable to distinguish between A. flandriensis and A. lemercieri. The distinction is only based on the visibility of the pseudopodia, which in my opinion isn’t very useful as a diagnostic character.

Test spherical or ovoid, symmetrical, with distinct neck A. mucicola
Test asymmetrical, with broad neck A. flandriensis
Test pyriform or ovoid, with or without distinct neck A. verbrugghei
Test pyriform or ovoid, without distinct neck Apogromia spec.
Test balloon-shaped, with tubular neck; neck not fastened to the substrate Apogromia spec.
Test balloon-shaped or broad ovoid, without neck Apogromia spec.
Test globular or broadly bell-shaped, with short tubular neck A. pagei
Test pear-shaped with a wide aperture, with typical Y-shaped pseudopodium stalk Apogromia spec.
Test elongated ovoid, like a sausage Apogromia spec.

Apogromia spec.
Apogromia verbrugghei
Apogromia spec.
Recent posts

Arcella marginata

Arcella marginata, after Deflandre, 1929 Arcella marginata Daday, 1905 Diagnosis: Shell roughly hemispherical, rather overhanging, with a flattened, smooth edge. In dorsal view showing a

Read More »

Arcella lobostoma

Arcella lobostoma, after Deflandre, 1929 Arcella lobostoma Deflandre, 1929 Diagnosis: Shell hemispherical. In ventral view, irregular circular outline, often a little elliptical; pseudostome irregularly lobed:

Read More »

Pelomyxa video

Pelomyxa palustris Pelomyxa palustris, found below decaying leaves in the hollow of a beech Pelomyxa palustris, found below decaying leaves in the hollow of a

Read More »

Hoogenraadia galeata

H. galeata – from Stepanek, 1963 Hoogenraadia galeata  (Stepanek, 1963) n. comb. Gillardella galeata Stepanek, 1963 Diagnosis: Shell somewhat similar to the shell of Corythion dubium

Read More »

Arcella grospietschi

Arcella grospietschi, after Stepanek, 1963 Arcella grospietschi  Stepanek, 1963 Diagnosis: Shell disc-shaped, yellow-brown, in ventral view with a undulated border, with seven large and seven smaller

Read More »

Arcella oyei

Arcella oyei, after Stepanek, 1963 Arcella oyei  Stepanek, 1963 Diagnosis: In dorsal view, the shell is circular, with 10 apparent broken lobes on the surface. In

Read More »