Microworld

world of amoeboid organisms

Menu
Paramphitrema lemanense
Paramphitrema lemanense, shell 30 µm

Genus Paramphitrema Valkanov, 1970

Diagnosis: shell elliptical, in cross section compressed or circular, with two apertures at opposite poles, more or less ending in two tubes. Shell covered with small mineral particles. Two types of filopodia, either thin and branching or thicker with only one per pseudostome during rapid locomotion. Plasma fills the shell completely.

Type species: Paramphitrema pontica Valkanov (1970)

Ecology: marine and freshwater, algivorous.

Remarks: Further investigations are needed to clear its taxonomic status. In its behaviour and the presence of flagella-like filopodia, Paramphitrema species closely resemble Artodiscus saltans.
Species in this genus:

  • Paramphitrema rhenanum (Lauterborn, 1896)
  • Paramphitrema lemanense (Penard, 1903)
  • Paramphitrema pontica Valkanov (1970): 35-56 µm
  • Paramphitrema muelleri Kiss and Török (2009): 13-17 µm
  • Paramphitrema n. sp. 10-20 µm
Paramphitrema lemanense
Paramphitrema lemanense
Paramphitrema lemanense, 44 µm long and 13.6 µm broad, Naardermeer
Recent posts

Actinosphaeridium spec.

Actinosphaeridium spec. Actinosphaeridium spec. Diagnosis: Cell surrounded by a kind of membranous shell. Filopodia with granules, sometimes branching. Cell not stalked, at least not observed.

Read More »

Euglyphidion

Euglyphidion enigmaticum – after Bonnet, 1960 Genus Euglyphidion Bonnet, 196 Diagnosis: Shell hyaline, ovoid, pseudostome circular or slightly elliptical. Shell loosely covered with two types of

Read More »

Leptomyxa spec.

Leptomyxa sp., slowly retracting in response to the light of the microscope Leptomyxa sp. Diagnose: This is a very large amoeba which I found in

Read More »

Zivkovicia spec.

Zivkovicia spec., 200 µm long; the right image is viewed through the aperture Zivkovicia spec.  Diagnosis: Shell pyriform, circular in oral view, with a clear

Read More »

Pontigulasia pentangulostoma

P. pentangulostoma, after Quin et al., 2008 Pontigulasia pentangulostoma Quin et al., 2008 Diagnosis: Shell is brown, laterally uncompressed, parted to neck and body regions

Read More »

Flabellula citata

Flabellula citata, from Dykova et al., 2008 Flabellula citata Schaeffer, 1926 Diagnosis: Length in locomotion 15-75 µm; width 25-55 µm. Shape very variable, from a

Read More »