Microworld

world of amoeboid organisms

Menu
Corythium dubium
Corythion dubium
Corythium dubium, 35 and 32 µm

Corythion dubium  Taranek, 1871

Diagnosis: shell ovoid, composed of approximately four hundred oval shell-plates, irregularly arranged, very small and usually overlapping each other; aperture sub-terminal, oval and invaginated; about thirty small, oval, apertural-plates surround the aperture, each carrying a median dorsal tooth.

Dimensions: Length 33-43 µm; breadth 25; mouth 10 µm; shell-plates length 2.9-3.4, width 1.5-1.9; diameter of apertural-plates 0.9-1.1 µm.

Ecology: Sphagnum and mosses.

Remarks: The apertural-plates are similar to those seen in Trinema enchelys and T. lineare. Differences in the size of the shell are illustrated by Cash et al., (1915).

Corythion dubium
Morphometry of Corythion shells in a sample from a Sphagnum bog in Amersfoort, the Netherlands. Three groups can be distinguished. The left shell (C. dubium) represents the middle group and is 35 µm long, the other shell is 56 µm and represents the population to the right (C. constricta).
C. dubium, 39 µm
Corythium dubium
C. dubium, with small scales visible
Corythium dubium
C. dubium, 35 µm, nucleus visible
Corythium dubium
Corythion dubium
Left: Shell 37 µm, in moss on a roof; Right: from Ogden, 1980
Corythium dubium
Corythion dubium
C. dubium, nucleus (L), pseudostome (R)
Recent posts

Bullinularia maxima

Bullinularia maxima – from Bobrov and Mazei, 2020 Bullinularia maxima Bobrov et Mazei, 2020 Diagnosis: Shell brown, opaque, elliptical in ventral view; ventral surface is

Read More »

Bullinularia macroporum

Bullinularia macroporum – from Bobrov and Mazei, 2020 Bullinularia macroporum Bobrov et Mazei, 2020 Diagnosis: Shell yellow-brownish, transparent, circular in ventral view; ventral surface is

Read More »

Nebela golemanskyi

N. golemanskyi, after Todorov, 2010 Nebela golemanskyi Todorov, 2010 Diagnosis: Shell large, colourless and pyriform, with a distinct short neck about one fourth of the

Read More »

Nebela nebeloides

N. nebeloides, after Gauthier-Lièvre and Thomas, 1958 Nebela nebeloides (Gauthier-Lièvre and Thomas, 1958) Todorov et al., 2010 Basionym: Difflugia nebeloides Gauthier-Lièvre and Thomas, 1958 Diagnosis:

Read More »

Difflugia biwae

D. biwae, after Yang and Shen, 2005 Difflugia biwae Kawamura, 1918 Diagnosis: Shell in lateral view fusiform in outline with a straight neck, a conspicuous

Read More »