Microworld

world of amoeboid organisms

Menu

Genus Vampyrella West 1901, emend. Hess et al. 2012
  
Diagnosis: Exclusively heterotrophic, naked, phagotrophic amoeboid organisms; life cycle includes amoeboid, free moving trophozoites alternating with an obligatory digestive cyst, in which cell division usually take place; several taxa can fuse to form plasmodia and reach considerable sizes; sexual processes unknown; cytoplasm often differentiated into a finely granular, sometimes highly vacuolated part and structureless hyaloplasm, the latter often surrounding the main cell body, but at least constituting the pseudopodia; free-living in freshwater, soil, or marine environments.

Detail of filopodia with “dancing” granules.

 

This very instructive and beautiful video was made by Norbert Hülsmann and shows the development and mode of nutrition in Vampyrella lateritia, with following comment: “There are three strains of Vampyrella lateritia which are known to feed on green algae. One attacks Spirogyra, a second Closterium and the third Mougeotia. V. lateritia bores a hole through the algal cell wall and surrounds the protoplast with an ingestion pseudopodium. Vampyrella encysts after phagocytosis has been completed. Vegetative swarmers are subsequently released from the cyst.”

Recent posts

Nebela golemanskyi

N. golemanskyi, after Todorov, 2010 Nebela golemanskyi Todorov, 2010 Diagnosis: Shell large, colourless and pyriform, with a distinct short neck about one fourth of the

Read More »

Nebela nebeloides

N. nebeloides, after Gauthier-Lièvre and Thomas, 1958 Nebela nebeloides (Gauthier-Lièvre and Thomas, 1958) Todorov et al., 2010 Basionym: Difflugia nebeloides Gauthier-Lièvre and Thomas, 1958 Diagnosis:

Read More »

Difflugia biwae

D. biwae, after Yang and Shen, 2005 Difflugia biwae Kawamura, 1918 Diagnosis: Shell in lateral view fusiform in outline with a straight neck, a conspicuous

Read More »

Difflugia mulanensis

D. mulanensis, after Yang et al., 2015 Difflugia mulanensis Yang, Meisterfeld, Zhang and Shen, 2015 Diagnosis: Shell elongate ovoid like a vase, with a distinct

Read More »

Euglypha bryophila

Euglypha bryophila, after Brown, 1911 (L), from Ecuador (R) Euglypha bryophila  Brown, 1911 Diagnosis: (Original description) The test is very regular in form and subject

Read More »

Vernalophrys

(A) A Scenedesmus cell (arrow) is engulfed by a trophozoite. (B) Several Scenedesmus cells adhere to the surface of a plasmodium that has numerous vacuoles

Read More »