Coactilum Maslov, 1956 Rothpletzella is a genus of calcimicrobe known from the Silurian of Gotland, the Devonian of France, as well as the Ordovician of China.

[3][4][2] It has been hypothesised to be a cyanobacterium, and shares morphological similarities with extant cyanobacteria.

[5] The genus is named in honor of August Rothpletz.

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