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.

Beginning of observation; one of two nuclei is visible; there is one pseudostome.
The “isthmus” between both cells gets smaller.
One thick lobopodium is present and one pseudostome.
Each cell develops its own pseudostome. It’s not clear how the original pseudostome splits into two new ones.
The arrow points to the collar of the new pseudostome.
Cells move farther away from each other.
Both cells are separated.
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