Grewingkia

{{Short description|Extinct genus of corals}}

{{Speciesbox

| fossil_range = Ordovician[http://members.wolfram.com/jeffb/Fossils/Cnidaria.shtml Cnidarian Fossils From The Ordovician Period]

| image = RugosaOrdovician.jpg

| parent_authority = Dybowski, 1873

| taxon = Grewingkia canadensis

| authority = (Billings, 1862)[http://www.uga.edu/strata/cincy/fauna/rugosa/Grewingkia.html Cincinnatian Fossils and Stratigraphy]

| synonyms = {{hidden begin|title = List}}

• Grewingkia rustica
• Streptelasma rusticum
• Streptelasma vagans Foerste, 1909
• Streptelasma insolitum Foerste, 1909
• Streptelasma dispandum Foerste, 1909

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Grewingkia is a genus of extinct Paleozoic corals, found in Indiana. It contains at least one species, Grewingkia canadensis.