Graticula, formerly incorrectly named Craticula,[1] is a genus of Palaeozoic coralline alga.

[2] They form the framework of reef rocks in the Silurian of Gotland, from the Högklint, Slite and Halla groups.

[3] The Graticulaceae closely resemble the Cretaceous Solenoporaceae, and are only really differentiated by their stratigraphic position.

[2] Graticula mineralized with calcite.

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