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

Cyclopyxis kahli oblonga

C. kahli f. oblonga , after Tarnogradskii, 1959 Cyclopyxis kahli f. oblonga  (Tarnogradskii, 1959) Centropyxis kahli f. oblonga Tarnogradskii, 1959 Diagnosis:  Test with all the

Read More »

Cyclopyxis leclercqi

Cyclopyxis leclercqi – from Beyens and Chardez, 1986 Cyclopyxis leclercqi Beyens and Chardez, 1986 Diagnosis: Shell circular in apertural view, dorso-ventrally compressed with a swollen

Read More »

Haplomyxa saranae

Haplomyxa saranae Dellinger, 2014 Diagnosis: cell body from small rounded (0.1 mm) to large elongated shape (up to 3.5 x 0.3 mm), usually flat but

Read More »

Haplomyxa spec.

Main cell body Haplomyxa spec. Description: The cell has a central body from which numerous granuloreticulopodia emerge. The cell body can be small or large,

Read More »

Haplomyxa spec.

Haplomyxa spec. These video’s show an undescribed Haplomyxa species which was collected from a mesotrophic freshwater pond in the Netherlands, January 2020, and kept in Petri

Read More »

Chlamydophrys-schaudinn

Fritz Schaudinn (1871 – 1906) was a German zoologist. He was the co-discoverer of the causative agent of syphilis and did research on amoebas, particularly

Read More »