Microworld

world of amoeboid organisms

Menu

Choanocystis cf. lepidula

Genus Choanocystis  Penard, 1904
  
Diagnosis: Centroheliozoa with a periplast with tangential plate-scales and radial spine-scales. The radial spine-scales have a cylindrical shaft, which inserts eccentrically at the apex of an invagination or incision of a heart-shaped base-plate.
Thirteen species, mostly freshwater.
References: Mikrjukov (1995b), Siemensma and Roijackers (1988a).
Type species: Choanocystis lepidula Penard, 1904
  
Choanocystis
  

Typical Choanocystis scales

Choanocystis aculeata - Ferry Siemensma

Spine-scales of C. aculeata in phase contrast
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 »