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

Microcorycia spec. 4

Microcorycia spec. , folded Microcorycia spec.? I found this specimen in a sample from moss on a fallen tree in a marsh in the Naardermeer,

Read More »

Microchlamys spec.

Microchlamys spec., the same cell in lateral view Microchlamys spec. Diagnosis: Shell relatively high compared with all described species. The diameter is twice the height.

Read More »

Excentrostoma

Infraorder Excentrostoma Kosakyan et al., 2016   Diagnosis: Testate amoebae with an eccentrically placed aperture; test organic with few or many xenosomes. Family Centropyxidae Jung, 1942  

Read More »

Longithecina

Infraorder Longithecina Kosakyan et al., 2016   Diagnosis: Testate amoebae with a more or less tubular or cylindrical test and a terminal aperture; test with

Read More »