Microworld

world of amoeboid organisms

Menu
Penardeugenia

Penardeugenia

I found one specimen in a sample from Kootwijk, the Netherlands. It resembled in its shape and behaviour the German specimen from the river Weser, but the Dutch specimen was much smaller, showed spines and didn’t have any reddish color. It moved relatively fast (watch the video below) and disappeared in the debris before I could make better images. The cell is surrounded by a flexible membrane which is covered with many small scales, resembling Cochliopodium species. But this species can be distinguished from Cochliopodium by its oval pseudostome which is flexible and its conical fast moving pseudopodia.
Probably it is the one which has been described by Penard (1904) as Pamphagus bathybioticus (Penardeugenia bathybioticus).

Penardeugenia
Penardeugenia
Oval pseudostome, it shows small scales, which are all over the membrane.
Penardeugenia
Penardeugenia
The membrane is covered with spines.
 
Recent posts

Velamentofex

Velamentofex tyrolensis Family Velamentofexidae Völcker and Clauß, 2020 Diagnosis: Multinucleate organic-walled monothalamous foraminifera. Test spherical to pyriform, usually surrounded by a broad layer of mucus-like

Read More »

Claparedellus lachmannii

Claparedellus lachmannii, common shape (Riedensee) Claparedellus lachmannii  Khanipour Roshan and Clauß, 2020 Diagnosis: Multinucleate organic-walled monothalamous foraminifera. Test spherical to elongated pyriform or irregularly shaped, with a

Read More »

Claparedellus

Claparedellus lachmannii Genus Claparedellus Khanipour Roshan and Clauß, 2020 Diagnosis: Multinucleate organic-walled monothalamous foraminifera. Test spherical to elongated pyriform or irregularly shaped, with a hyaline, flexible,

Read More »

Haplomyxa spec

Fig. 1: Main cell body of specimen A, partly hidden by debris Haplomyxa sp. Three specimens were observed in a Petri dish, along with two

Read More »

Edaphoallogromiidae

Edaphoallogromia australica Family Edaphoallogromiidae Siemensma, Holzmann, Apothéloz-Perret-Gentil, Clauß, Voelcker, Bettighofer, Khanipour Roshan, Walden, Dumack and Pawlowski, 2020 Diagnosis: Multinucleate organic-walled monothalamous foraminifera with a spherical

Read More »

Lachmanni spec.

“Lachmanni spec., body length 127 µm “Lachmanni” spec. I found two cells, size about 125 µm when ovoid, with an organic-walled membranous test and a

Read More »