Microworld

world of amoeboid organisms

Menu
Trinema galeata
Trinema galeata, after Todorov and Bankov, 2019 (l) and Jung, 1942 (r)

Trinema galeata (Penard, 1890) Jung, 1942

Diagnosis: Shell small, colourless, transparent, ovoid, compressed, with oval transverse section; composed of two types of shell-plates: large, circular, slightly overlapping, of about 10 µm in diameter, and small, oval, of about 3,1-3,4 x 2,4-2,7 µm, which haphazardly fill interstices between large plates. Aperture oval, sub-terminal, oblique, invaginated, surrounded by two or three rows small, circular, denticulate apertural-plates and three to four rows of small shell-plates, which clearly indicate the place of junction of the wide apertural visor with the main body. Cytoplasm granular, fills almost the whole shell; one large nucleus, placed posteriorly in the cell, with single central nucleolus. Pseudopodia numerous, thin, long, sometimes branching, usually well visible.

Dimensions: 41-84 um long; 22-49 µm wide; large scales about 10 µm in diameter, small ones 3,1-3,4 x 2,4-2,7 µm.  diameter of large shell-plates 5.6-10.3; aperture 11-24 µm (Todorov and Bankov, 2019).

Ecology: Mosses and soils, rare in Sphagnum. Probably cosmopolitan.

Remarks: Trinema galeata differs from T. complanatum by the well visible line indicating the place of junction of the wide apertural visor with the main body.

Trinema galeata
Trinema galeata
Trinema galeata, wet moss in my garden pond, the Netherlands 2019
Trinema galeata
Trinema galeata
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 »