Microworld

world of amoeboid organisms

Menu
Trinema lineare
Trinema lineare, 32 µm long

 

Trinema lineare Penard, 1890

Diagnosis: Shell elliptic, oval in transverse section; shell composed of approximately fifty, large, circular, incompletely overlapping, shell-plates, and an unknown number of small, oval to circular, shell-plates which either haphazardly fill the interstices or are completely overlaid by the large shell-plates; shell plates hardly visible in bright field; aperture normally circular, invaginated and situated sub-terminally, bordered by an inner circle of from 18 to 28 small, denticulate apertural-plates and one or two rows of small shell-plates; apertural-plates may occasionally be moved from their marginal position to form double rows, or to be displaced out of symmetry. Nucleus with a central nucleolus.

Dimensions: Length 16-30 µm.

Ecology: mosses, Sphagnum, aquatic vegetation, moistened soils. Generally distributed and apparently the commonest form of all Rhizopoda.

Remarks: Cash et al. (1915), Chardez (1956, 1970) and Thomas (1958) have illustrated variation in the position of the aperture, including examples of invaginated apertures. Whilst, in clonal cultures several abnormal forms have been observed (Hedley and Ogden, 1974)

Trinema lineare
Trinema lineare
Shell 30 and 20 µm
Trinema lineare
Trinema lineare
Recent posts

Penardochlamys arcelloides

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

Read More »

Reticulomyxa hannae

R. hannae, plasmodium – photomicrograph Steffen Clauss Reticulomyxa hannae Völcker and Clauß, 2020 Diagnosis: Trophozoites surrounded by a very thin mucous envelope, with slowly moving plasmodia, variable

Read More »

Velamentofex saxonensis

V. saxonensis, feeding (photomicrograph Steffen Clauss) Velamentofex saxonensis Völcker and Clauß, 2020 Diagnosis: Trophozoites ovoid, 30-95 μm, granuloreticulopodia up to 1000 μm long. with a hyaline, thin

Read More »

Velamentofex tyrolensis

V. tyrolensis (photomicrograph Steffen Clauss) Velamentofex tyrolensis Völcker and Clauß, 2020 Diagnosis: Trophozoites ovoid, 98-125 μm, with reticulopodia up to 300 μm long, with a hyaline,

Read More »

Velamentofex berolinensis

V. berolinensis Velamentofex berolinensis Völcker and Clauß, 2020 Diagnosis: Trophozoites ovoid, 50-300 µm, with a hyaline, extremely flexible, membranous test. Nuclei numerous, 11.6-16.2 µm in diameter,

Read More »

Lieberkuehniidae

 Lieberkuehniidae  Siemensma, Holzmann, Apothéloz-Perret-Gentil, Clauß, Voelcker, Bettighofer, Khanipour Roshan, Walden, Dumack and Pawlowski, 2020 Diagnosis: Multinucleate organic-walled monothalamous foraminifera. Test very flexible, elongated to broadly

Read More »