Microworld

world of amoeboid organisms

Menu
Paralieberkuehnia elegantula
Paralieberkuehnia elegantula, 21 µm

Paralieberkuehnia elegantula (Penard, 1904)

Diagnosis: Shell spherical with short tubular neck, composed of organic material, finely granulated, without any embedded xenosomes; hyaline, colorless, older shells yellow till dark-brown. Cytoplasm pear-shaped with an asymmetrical bundle of filopodia (“Pseudopodienstiel”) which are granular (extrusomes),  thin, usually very straight, not resting on any substrate, sometimes branching and anastomosing. Nucleus relatively large, globular with a central nucleolus. One or two contractile vacuoles. Division in the shell, a ciliated swarmer leaves the cell.

Dimensions: Penard: 20-25 µm; my measurements: 18-26 µm.

Ecology: Freshwater; shallow, iron rich water, between Sphagnum and in sediments, but also in small rivers and ponds.

Paralieberkuehnia elegantula
Paralieberkuehnia elegantula
Paralieberkuehnia elegantula with cilium and after Penard, 1904
Shell of Paralieberkuehnia elegantula
Paralieberkuehnia elegantula
Paralieberkuehnia elegantula
Shell, 21 µm, with collar visible; same specimen as below – Crailoo and shell, 16 µm, with granular wall – Tirol, Austria, probably another species.
Paralieberkuehnia elegantula
Paralieberkuehnia elegantula, 21 µm – Crailoo, Netherlands
Paralieberkuehnia elegantula
Paralieberkuehnia elegantula
Paralieberkuehnia elegantula, – Kromme Rade, Netherlands
Paralieberkuehnia elegantula
Recent posts

Apolimia

A. rotundistoma, from Korganova, 1987 Genus Apolimia Korganova, 1987 Diagnosis: Shell ovoid, quite large, opaque, round in cross section, densely covered with round or oval

Read More »

Erugomicula

E. bidens, 315 and 270 µm, Naardermeer, the Netherlands Genus Erugomicula Nasser, Gregory, Singer, Patterson and Roe, 2021 Typespecies: Erugomicula bidens (Penard, 1902) Diagnosis: laterally-compressed,

Read More »

Erugomicula bidens

Two shells from the same sample, 310 µm (Naardermeer, Netherlands) Erugomicula bidens (Penard, 1902) Basionym: Difflugia bidens Penard, 1902 Diagnosis: Test ovoid, compressed in cross-section,

Read More »

Cylindrothecina

Infraorder Cylindrothecina González-Miguéns et al., 2022   Diagnosis:  can be diagnosed by its specific sequences of the mitochondrial and nuclear DNA  markers (COI, NADH and

Read More »

Organic-walled species

Specimen with an optical cross-section of the peduncle (left) Organic-walled species Diagnosis: Multinucleated organic-walled monothalamous foraminifera. Test spherical to oval shaped, with a hyaline, flexible,

Read More »

Velamentofex tyrolensis

V. tyrolensis, two specimens Velamentofex tyrolensis Völcker and Clauß, 2020 April 2022, I found two specimens in a sample from the pond in Crailoo, Netherlands. I could

Read More »

Raphidiophrys spec. nov.

Raphidiophrys n. sp. Raphidiophrys n. sp. Diagnosis: Plate-scales canoe-shaped, elongated, with tapering, rounded poles, slightly curved upwardly. Light microscopically, these plate-scales show a clear rim;

Read More »

Lacogromia spec. Naardermeer

Lacogromia sp., Naardermeer, the Netherlands, 2022 (n=nucleus) Lacogromia sp. Six living specimens were found in an old sediment sample from a freshwater ditch in nature

Read More »

Sphenoderia rhombophora

S. rhombophora , after Bonnet, 1966 Sphenoderia rhombophora Bonnet, 1966 Diagnosis: Test hyaline, ellipsoidal, very slightly compressed. Fundus relatively narrow. Pseudostome largely truncated. Neck very

Read More »

Sphenoderia ovoidea

S. ovoidea , after Jung, 1942 Sphenoderia ovoidea Jung, 1942 Diagnosis: Shell with four layers of plate-scales. Distinguished from S. fissirostris by the ovoid tapering

Read More »