world of amoeboid organisms

Menu

Longitudinal division of a naked Frenzelina cell

December 16 I had several specimens of a large naked Frenzelina species in a wet mount which I had kept for over two weeks in de moisture chamber. I could observe a division of one specimen, at least the last part of it. It’s a longitudinal division, which means that the division starts at the “dorsal” side and ends with the division of the mouth or pseudostome.

14:14:55
Beginning of observation; one of two nuclei is visible; there is one pseudostome.
14:19:46
The “isthmus” between both cells gets smaller.
14:20:14
One thick lobopodium is present and one pseudostome.
14:24:37
Each cell develops its own pseudostome. It’s not clear how the original pseudostome splits into two new ones.
14:26:21
The arrow points to the collar of the new pseudostome.
14:30:05
Cells move farther away from each other.
14:32:53
Both cells are separated.
Recent posts

Quadrulella scutellata

Quadrulella scutellata, after Wailes, 1912 Quadrulella scutellata  Wailes, 1912 Diagnosis: Test moderately large, hyaline, pyriform, compressed; composed of small siliceous, rectangular plates arranged in irregular

Read More »

Mrabella plicata

M. plicata, after Hoogenraad and De Groot, 1940 Mrabella plicata (Hoogenraad and De Groot, 1940) Diagnosis: Test made of small square plates, between which some

Read More »

Quadrulella alata

Q. alata, after Gauthier-Lièvre, 1957 Quadrulella alata  Gauthier-Lièvre, 1957 Diagnosis: In frontal view, the test is lageniform, with a broadly rounded fundus (subcircular or ovoid)

Read More »

Quadrulella acuminata

Quadrulella acuminata, after Van Oye, 1958 Quadrulella acuminata  Van Oye, 1958 Diagnosis: Test rather pyriform with a stretched base with converging sides, very slightly concave

Read More »