Microworld

world of amoeboid organisms

Menu
Apogromia-verbrugghei
Apogromia-verbrugghei
A. verbrugghei

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

Actinosphaeridium spec.

Actinosphaeridium spec. Actinosphaeridium spec. Diagnosis: Cell surrounded by a kind of membranous shell. Filopodia with granules, sometimes branching. Cell not stalked, at least not observed.

Read More »

Euglyphidion

Euglyphidion enigmaticum – after Bonnet, 1960 Genus Euglyphidion Bonnet, 196 Diagnosis: Shell hyaline, ovoid, pseudostome circular or slightly elliptical. Shell loosely covered with two types of

Read More »

Leptomyxa spec.

Leptomyxa sp., slowly retracting in response to the light of the microscope Leptomyxa sp. Diagnose: This is a very large amoeba which I found in

Read More »

Zivkovicia spec.

Zivkovicia spec., 200 µm long; the right image is viewed through the aperture Zivkovicia spec.  Diagnosis: Shell pyriform, circular in oral view, with a clear

Read More »

Pontigulasia pentangulostoma

P. pentangulostoma, after Quin et al., 2008 Pontigulasia pentangulostoma Quin, Y., Xei, S., Gu, Y. and Zhou, X., 2008 Diagnosis: Shell is brown, laterally uncompressed,

Read More »

Flabellula citata

Flabellula citata, from Dykova et al., 2008 Flabellula citata Schaeffer, 1926 Diagnosis: Length in locomotion 15-75 µm; width 25-55 µm. Shape very variable, from a

Read More »