Microworld

world of amoeboid organisms

Menu
Choanocystis pantopoda
From Siemensma, 1991

Choanocystis pantopoda (Penard, 1904) emend. Dürrschmidt, 1987
Syn.: Acanthocystis pantopoda Penard, 1904

Diagnosis: Periplast, ca. 60-70 µm in diameter, with two kinds of scales. Spine scales straight or slightly curved, 25-30 µm long, tapering slightly to a blunt apex with a toothed margin of 6 triangular teeth. Shaft, cylindrical and hollow, the sides are of irregular thickness (ca. 0.5 µm thick), basal sometimes with siliceous nodules. Base of the spine seated eccentrically on a heart-shaped base-plate, 1.5 µm in diameter. Plate scales patternless, elongated elliptical with a distinct median constriction, 3.5-4.0 x 2.3-2.5 µm.

Remarks: This species is easily recognized, with light- and electron microscopy, by the shape and size of the periplast and the extremely long, strongly built, spine scales, 1.5-2 times the cell diameter in length. C. pantopoda is distinguished from C. cordiformis on the basis of the length and breadth of the spine scales and the appearance of the plate scales, which are thicker than those of C. cordiformis.

Recent posts

Velamentofex

Velamentofex tyrolensis Family Velamentofexidae Völcker and Clauß, 2020 Diagnosis: Multinucleate organic-walled monothalamous foraminifera. Test spherical to pyriform, usually surrounded by a broad layer of mucus-like

Read More »

Claparedellus lachmannii

Claparedellus lachmannii, common shape (Riedensee) Claparedellus lachmannii  Khanipour Roshan and Clauß, 2020 Diagnosis: Multinucleate organic-walled monothalamous foraminifera. Test spherical to elongated pyriform or irregularly shaped, with a

Read More »

Claparedellus

Claparedellus lachmannii Genus Claparedellus Khanipour Roshan and Clauß, 2020 Diagnosis: Multinucleate organic-walled monothalamous foraminifera. Test spherical to elongated pyriform or irregularly shaped, with a hyaline, flexible,

Read More »

Reticulomyxa spec

Main cell body is embedded in debris Reticulomyxa sp.? I found this naked foraminifer in material scratched from submerged rocks at the base of the

Read More »

Edaphoallogromiidae

Edaphoallogromia australica Family Edaphoallogromiidae Siemensma, Holzmann, Apothéloz-Perret-Gentil, Clauß, Voelcker, Bettighofer, Khanipour Roshan, Walden, Dumack and Pawlowski, 2020 Diagnosis: Multinucleate organic-walled monothalamous foraminifera with a spherical

Read More »

Lieberkuehnia spec.

Lieberkuehnia spec., body length 127 µm Lieberkuehnia spec.? I found two cells, size about 125 µm when ovoid, with an organic-walled membranous test and a

Read More »