Microworld

world of amoeboid organisms

Menu
Trinema enchelys – 77 µm long

Trinema enchelys (Ehrenberg, 1838)

Diagnosis: shell ovoid and flattened slightly in the apertural region, composed of approximately fifty, large, circular, incompletely overlapping shell-plates and an unknown number of smaller, oval, shell-plates. Aperture circular, sub-terminal and invaginated, bordered by an inner circle of about forty denticulate apertural-plates, and two or three rows of small, oval, shell-plates. Each apertural-plate is circular, and carries a median, dorsal tooth. One to two contractile vacuoles; pseudopodia few, attenuate and long.

Dimensions: 30-100 um long; 15-60 µm wide; scales 4-12 µm in diameter.  diameter of large shell-plates 5.6-10.3, diameter of small shell-plates 1.9-4.3; diameter of apertural plates 0.9-1.8 µm. My measurements: up to 155 µm!

Ecology: very common in mosses and aquatic vegetation.

Remarks: Distinction between T. enchelys and the very similar T. lineare only by their size. Both Chardez (1956) and Thomas (1958) have shown the differences in shape and size of the shell of this species.

Trinema enchelys
Trinema enchelys
Trinema enchelys
Large shell, c. 155 µm, with several rows of teeth in its pseudostome – Ecuador (= T. grandis?)
Trinema enchelys, 91 µm – Tirol,Austria
Trinema enchelys, living specimen
Living specimen
Trinema enchelys in division
Trinema enchelys, dividing
Trinema enchelys
Trinema enchelys, DIC
Trinema enchelys
Trinema enchelys
Pseudostome
Granules at the base of some filopodia
Trinema enchelys, after Lueftenegger et al, 1988
Trinema enchelys
Trinema enchelys
Very large shell from Ecuador, mosses, 155 µm; shell 104 µm
Trinema enchelys
Shell structure
Recent posts

Penardochlamys arcelloides

P. arcelloides – after Penard, 1904 Penardochlamys arcelloides  (Penard, 1904) Deflandre, 1953 Diagnosis: Colorless or very slightly yellowish envelope, bag or cauldron-shaped, very thin, chitinous,

Read More »

Haplomyxa spec

Fig. 1: Main cell body of specimen A, partly hidden by debris Haplomyxa sp. Three specimens were observed in a Petri dish, along with two

Read More »

Diplophrys spec. 7

Diplophrys spec., with three tufts of filopodia Diplophrys spec. These cells are granular, never seen before. I found them in a sample from the Bert

Read More »

Psammonobiotus spec.

I found this specimen in a sample from the Oppad, near Hilversum, 2020. It is similar to Psammonobiotus linearis, but lacks a clear spine at

Read More »

Sphenoderia compressa

Sphenoderia compressa, after Badewitz, 2002 Sphenoderia compressa Badewitz, 2002 Diagnosis: Test ovoid, oval in cross section, hyaline, covered with relatively small, oval, rather irregularly arranged

Read More »

Tracheleuglypha elongata

T. elongata, A-C after Thomas and Gauthier-Lièvre, 1959; D after Van Oye, 1959 Tracheleuglypha elongata Van Oye, 1959 Diagnosis: Test similar to T. dentata, but

Read More »