Microworld

world of amoeboid organisms

Menu
Acanthocystis drakena
From Zlatogursky, 2016

Acanthocystis drakena Zlatogursky, 2016

Diagnosis: Cells are 21.1-30.5 µm (ca. 26.7) in diameter. Cell is covered with oval plate-scales having a margin inflexed to the outer surface. The size of scales is 3.6-8.6 х 2.1-5.0 µm; length/width ratio – 1.1-1.9. Usually scales form a more or less thick and friable layer on the cell surface. Cells passively lay on the substrate or float.

Ecology: An algae-rich ditch. Drakensbergen, Monks Cowl, South Africa.

Remarks: Several species of Raphidiophrys have oval plate-scales: R. intermedia, R. ovalis and R. elegans. R. elegans differs from R. drakena in having curved scales and a tendency for colony-formation. Cells of R. ovalis are twice as large in cell diameter and have much bigger and more elongated scales. The most similar species is R. intermedia, although it has bigger, more elongated scales and larger cell diameter. Also, almost round scales (L/W ratio 1.1) were never observed in R. intermedia, but are present in R. drakena.

Recent posts

Penardochlamys arcelloides

P. arcelloides – from Penard, 1904 Penardochlamys arcelloides  (Penard, 1904) Deflandre, 1953 Diagnosis: Colorless or very slightly yellowish envelope, bag or cauldron-shaped, very thin, chitinous,

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 saxonensis

V. saxonensis, feeding (photomicrograph Steffen Clauss) Velamentofex saxonensis Völcker and Clauß, 2020 Diagnosis: Trophozoites ovoid, 30-95 μm, granuloreticulopodia up to 1000 μm long. with a hyaline, thin

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 »

Velamentofex berolinensis

V. berolinensis Velamentofex berolinensis Völcker and Clauß, 2020 Diagnosis: Trophozoites ovoid, 50-300 µm, with a hyaline, extremely flexible, membranous test. Nuclei numerous, 11.6-16.2 µm in diameter,

Read More »

Lieberkuehniidae

 Lieberkuehniidae  Siemensma, Holzmann, Apothéloz-Perret-Gentil, Clauß, Voelcker, Bettighofer, Khanipour Roshan, Walden, Dumack and Pawlowski, 2020 Diagnosis: Multinucleate organic-walled monothalamous foraminifera. Test very flexible, elongated to broadly

Read More »