Microworld

world of amoeboid organisms

Menu

Heleopera petricola var. amethystea – stacked image

 

Genus Heleopera Leidy, 1879

Diagnosis: shell always laterally compressed; aperture terminal, lenticular or slit-shaped, with a thin but distinct organic rim; colorless or yellowish, but with reddish or purple species; test composed of collected euglyphid body plates, mineral particles or diatoms, these materials often coated and reinforced  with siliceous material; nucleus ovular.

Ecology: Freshwater sediment, mosses (Sphagnum) and soil.

Key to the species:

1 Shell colorless or yellowish to brownish yellow 2
Shell wine red to purple red or purple
3
2 Shell yellow to brown yellow, hardly covered with xenosomes; protoplasm with zoochlorellae H. sphagni
Shell colorless, usually covered with many xenosomes
3 Shell wine red, with yellow lip H. rosea
Shell purple red to purple, without yellow lip H. petricola var. amethystea

 

Heleopera

Heleopera, with broad slit

Heleopera petricola, with split-shaped pseudostome – stacked image

Heleopera – stacked image

Heleopera petricola – stacked image
Recent posts

Amoeba proteus var.

Amoeba proteus var. Amoeba proteus var.  Diagnosis: This variety differs from the type by its oval nucleus. Dimensions: 250-400 µm (n=2); nucleus 34 x 29

Read More »

Reticulomyxa hannae

R. hannae, plasmodium – photomicrograph Steffen Clauß Reticulomyxa hannae Völcker and Clauß, 2020 Diagnosis: Trophozoites surrounded by a very thin mucous envelope, with slowly moving plasmodia, variable

Read More »

Velamentofex

Velamentofex tyrolensis (photomicrograph Steffen Clauß) Family Velamentofexidae Völcker and Clauß, 2020 Diagnosis: Multinucleate organic-walled monothalamous foraminifera. Test spherical to pyriform, usually surrounded by a broad

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 »

Velamentofex tyrolensis

V. tyrolensis (photomicrograph Steffen Clauß) Velamentofex tyrolensis Völcker and Clauß, 2020 Diagnosis: Trophozoites ovoid, 98-125 μm, with reticulopodia up to 300 μm long, with a hyaline,

Read More »