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Temporal range: Wenlock
Scientific classification e
(unranked): Archaeplastida
Division: Rhodophyta
Class: Florideophyceae
Stem group: Corallinales
Family: Graticulaceae
Genus: Graticula
Brooke & Riding, 1998
  • G. gotlandica (Rothpletz 1908)
  • Craticula Brooke & Riding
  • Solenopora gotlandica Rothpletz 1908
  • Solenopora gracilis Garwood & Goodyear

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.[4][clarification needed]


  1. ^ Brooke, C.; Riding, R. (2000). "Graticula and its derivatives, replacement name for the alga Craticula Brooke". Lethaia. 33 (2): 82–82. doi:10.1080/00241160050150203 
  2. ^ a b Brooke, C.; Riding, R. (1998). "Ordovician and Silurian coralline red algae". Lethaia. 31 (3): 185–195. doi:10.1111/j.1502-3931.1998.tb00506.x 
  3. ^ Nose, M.; Schmid, D.; Leinfelder, R. (2006). "Significance of microbialites, calcimicrobes, and calcareous algae in reefal framework formation from the Silurian of Gotland, Sweden". Sedimentary Geology. 192 (3–4): 243–265. Bibcode:2006SedG..192..243N. doi:10.1016/j.sedgeo.2006.04.009. 
  4. ^ "A new Mississippian red alga from south-western Spain". Sedimentary Geology. 39: 791–803. doi:10.1016/j.geobios.2005.09.002.