Microworld

world of amoeboid organisms

Menu
Pyxidicula
Pyxidicula patens – 39 µm

Genus Pyxidicula Ehrenberg, 1938

Diagnosis: shell patelliform or hemispherical, more or less rigid, transparent, speckled; aperture circular, almost the entire diameter of test, or somewhat contracted by an inward margin; a single nucleus; one or more contractile vacuoles.

1 Shell hemispherical 2
Shell flattened, like a disc 4
2 Aperture with a narrow recurved margin P. operculata
Aperture with two narrow margins or collars, one curved inwards, the other curved outwards 3
3 Outer collar broader than the inner rim, hyaline, thinner than the rest of the shell and somewhat undulated P. patens
Both collars relatively small with the same structure and color as the rest of the shell, not undulated Pyxidicula spec.
4 Shell with a flat margin P. cymbalum
Shell with a hollow or tube shaped margin P. invisitata
Pyxidicula operculata
Recent posts

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 »

Actinosphaeridium spec.

Actinosphaeridium spec. Diagnosis: Cell surrounded by a membranous shell, with an outer mucous layer. Filopodia with granules, sometimes branching. Cell stalked. Ecology: I found this

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 »