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File:Corallochytrium limacisporum - Coenocytic Division+Aggregative Multicellularity.jpg

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Corallochytrium_limacisporum_-_Coenocytic_Division+Aggregative_Multicellularity.jpg (712 × 537 pixels, file size: 61 KB, MIME type: image/jpeg)

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Description
English: Temporally alternating life cycles of unicellular holozoans. Life stages of the corallochytrean Corallochytrium limacisporum. Reproduction in C. limacisporum occurs mainly through binary fission (99% of the cases), during which a binucleated cell divides into two, symmetrical, uninucleate cells. Binucleate cells can form two lobes that can lead to cellular division (forming two monoucleate cells), or can reverse towards spherical cells. At this point (*), cells can transition to coenocytic growth (1% of the cases) and continue dividing their nuclei further forming quadrinucleated cells. Quadrinucleated cells can often form a clover-like shape (similar to bilobed cell), that generates either four mononucleate cells or returns to spherical shape and further divides to an eight, 12 and up to 32 nuclei coenocyte. Coenocytes can release dispersive amoebas to start the cycle over again.
Date
Source The origin of animals: an ancestral reconstruction of the unicellular-to-multicellular transition. In: Open Biology, published by The Royal Society. doi:10.1098/rsob.2003591.
Author Núria Ros-Rocher, Alberto Pérez-Posada, Michelle M. Legerand Iñaki Ruiz-Trillo
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Temporally alternating life cycles of unicellular holozoans. Life stages of the corallochytrean ''Corallochytrium limacisporum''.

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18 June 2022

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